What Are Thermal Fuses?

The use and maintenance of power tools 960 is a book published by Machinery Industry Press, author Yang Hongjun.

Question 960

This book answers the related questions encountered in the use, maintenance and repair, sales and purchase, management and manufacturing of power tools. The content involves the basic knowledge of power tools, practical application skills, selection points, maintenance and repair technology, quick reference information, etc. Knowledge and skills. This book explains the profound things in a simple way, is simple and concise, and is highly targeted and practical. It is a companion for readers to answer questions.

This book is suitable for tool maintenance personnel, home appliance maintenance personnel, electromechanical maintenance personnel, electrical equipment maintenance personnel, and general electricians and electrical personnel. It can also be used as a reference for teachers and students of colleges and universities, and training courses.

Preface Chapter 1 Overview 1
1.1 Basic Concepts 1
Q1 What is a power tool? 1
Q2 What is a handheld power tool? 1
Q3 What are portable power tools and what are their characteristics? 1
Q4 What is the classification and characteristics of power tools? 1
Q5 What are the metal cutting tools? 2
Q6 What are the sanding tools? 2
Q7 What are the assembly work tools? 2
Q8 What are the forest tools? 2
Q9 What are the garden tools? 2
Q10 What are the construction and road tools? 3
Q11 What are the mining tools? 3
Q12 What is a work tool? 3
Q13 What is the type II structure of electric tools? 3
Q14 What is the type III structure of electric tools? 3
Question 15 What is a class III appliance? 3
Q16 What are the accessible parts or surfaces of a power tool? 3
Q17 What are the non-removable parts of a power tool? 3
Q18 What is a non-removable flexible cable or cord? 3
Q19 What are the removable parts of a power tool? 3
Q20 What is a detachable flexible cable or wire? 4
Q21 What are the power connection methods? 4
Q22 What is a power cord? 4
Q23 What is the internal wiring? 4
Q24 What is an interconnecting wire? 4
Q25 What is the concept of power circuit, control circuit and electronic circuit? 4
Question 26 What is a clamping mechanism? 4
Q27 What is engineering plastics? 5
Q28 What is internal stress? 5
Question 29 What is stress cracking? 5
Q30 What are the types of insulation? 5
Q31 What are accessories and accessories? 5
Q32 what is the normal use of power tools? 6
Ask 33 what is the live part? 6
Question 34 What is all-pole disconnection? 6
Ask 35 what is the creepage distance? 6
Q36 What is the electrical clearance? 6
Q37 What is the insulation penetration distance? 6
Q38 What is extra low voltage? 6
Q39 What is a safety extra-low voltage? 6
Q40 What is a safety isolation transformer? 6
Q41 What is the protection impedance? 6
Q42 What is a grounding device? 7
Q43 What is a protective device? 7
Q44 What is a thermostat? 7
Q45 What is a thermal circuit breaker? 7
Q46 What is a self-resetting thermal circuit breaker? 7
Q47 What is a non-self-resetting thermal circuit breaker? 7
Q48 What is a thermal fuse? 7
Q49 What is a control device? 7
Question 50 What is a residual current action protector? 7
Q51 What is a protective device? 7
Question 52 What is a forward and reverse device? 8
Question 53 What is electromagnetic compatibility? 8
Q54 What is electromagnetic disturbance? 8
Q55 What is continuous harassment? 8
Q56 What is the disturbance power limit? 8
Q57 what is the harmonic current limit? 8
Q58 What are the voltage fluctuation and flicker limits? 8
Q59 what is the immunity level? 8
Q60 What is the immunity limit? 8
Q61 What is electromagnetic interference? 8
Q62 What is electromagnetic emission? 9
Q63 what is the emission limit? 9
Q64 What is a radio and TV interference suppressor? 9
Q65 what is the terminal voltage limit? 9
Q66 what is the terminal voltage measurement method? 9
Q67 What is pollution? 9
Question 68 What is a tiny environment? 9
Q69 What are the states in a tiny environment? 9
Q 70 What is a clutch? 9
1.2 Specifications and parameters 10
Q71 What are the types of tools? 10
Q72 What are the types of power tools? 10
Q73 What is the comparison between pneumatic tools and electric tools? 11
What is the composition of 74 electric tool models? 12
Q. What does the 75 Bosch power tool model mean? 12
What is the composition of the 76 power tool assembly? 14
Q77 What are the ratings and parameters of 77 electric tools? 15
What are the basic parameters of 78 electric tools? 16
Q79 Is there any regulation for the deviation of the rated input power of the tool? 16
Q 80 Is there any regulation for the rated current and rated voltage of the tool? 16
Q81 Is there any requirement for the insulation resistance of the tool? 16
Q82 Is there any requirement for the test voltage and test points of the tool? 16
1.3 Certifications and Marks 17
Q83 What are the common certification marks? 17
Q84 What is CCC certification? 18
Q What are the rules for the 85 tool mark? 18
Q. What are the rules for symbols used in 86 tool signs? 19
Q. What are the rules for the position of the adjustment device and switch on the 87 tool? 20
Q 88 how to detect the mark on the tool? 20
1.4 Use and Requirements 20
Q89 What are the requirements that electric tools need to meet? 20
Q90 What are the electrical safety requirements for using electric tools? twenty one
Q91 What are the environmental requirements for using electric tools? twenty one
Q92 What are the requirements for the working site of electric tools? twenty one
Q93 What are the personal safety requirements for using power tools? twenty one
Ask 94 how to choose the electrical safety protection of the tool reasonably? twenty two
Q. What are the differences, uses, and choices of 95 hand drills, impact drills, hammers, and picks? twenty two
Q96 how to buy power tools? twenty two
Q97 What are some precautions for using power tools? twenty three
Q98 What items need to be checked before operating electric tools? 25
Q99 how to keep power tools? 25
Q100 how to maintain and repair power tools? 26
Q101 What special effects do some electric tools have? 26
Q102 What are the common reasons that tools installed on the machine are easily caught? 27
Q103 What are the main protections of power tools? 27
Ask 104 what is a rebound and how can I prevent it? 27
1.5 Others 27
Q105 What are the common labor protection articles? 27
Question 106 What is electronic speed control? 27
Q107 What are the main reasons for electric shock accidents when using tools? 27
Q. What is the contrast between Chinese and English for 108 electric tools? 28
Chapter 2 Accessories and Attachments 29
2.1 Leads, plugs and terminals 29
Q1 What are the requirements for the safety of flexible cables or cords? 29
Q2 What are the characteristics of the general power tool connection method? 29
Q3 What are the requirements and characteristics of the power tool power cord? 29
Q4 What are the requirements for the cross-section of the power tool power cord? 30
Q5 What is the type and identification of the wire? 31
Q6 What are the characteristics of power rubber cords for power tools? 31
Q7 How do I choose the color of the power tool power cord? 31
Q8 How to choose the color of the wire in the power tool? 31
Q9 What are the specifications of flexible cables commonly used in power tools? 32
Q10 Under what circumstances does PVC wire not be selected on power tools? 32
Q11 What are the materials and requirements of the power tool wire sheath? 32
Q12 What are the power cord specifications for some power tools? 32
Q13 What are the safety requirements for power tool plugs and sockets? 33
Q14 What are the types of power tool power cord plugs? 33
Q15 How to judge the phase line, neutral line and ground line based on the power cord socket? 34
Q16 How to check the quality of the power cord? 35
Q17 What are the characteristics and specifications of the power tool sheath? 35
Q18 What are the characteristics and requirements of the internal wiring of power tools? 36
Q. What are the requirements for the cross-sectional area of the connection terminals of 19X type connection terminals? 37
Q. What are the dimensions of the 20-pin terminal block? 37
What is the size specification of 21 screw hole type terminal? 37
What is the size specification of the 22-bolt terminal? 38
2.2 Fasteners 38
Q23 What are the common length measurement units and how are they converted? 38
Q24 What are standard parts and what are fasteners? 38
Q25 What are some terms, terms and concepts related to fasteners? 38
Q What types of 26 threads are divided into? 40
What are the elements of 27 threads? 40
Q28 What are the characteristic codes and uses of several threads? 41
Q29 What are the labels for some fasteners? 41
Q What are the forms of 30 thread fastener heads? 42
Q. What are the structural forms of 31 thread ends? 43
Q32 What is the common pitch? 43
Q33 What are the differences between standard metric nuts? 44
Q. What are the common types of 34 nut threads? 44
Q35 What are the common nuts of power tools? 44
Q36 What are the common screws for power tools? 44
Q 37 What is the quick check of the power tool round head screws in the tool? 45
Q 38 What is the quick check of self-tapping screws for electric tools in tools? 46
Q 39 What is the quick check of the power tool bolt in the tool? 47
Q40 What are the common power tool circles? 49
Q41 What are the common power tool washers? 49
Q 42 What is the quick check of the power tool retaining ring in the tool? 49
2.3 Plastic 51
Q43 How do some plastic abbreviations compare with their names? 51
Q. What are some nouns of 44 plastic? 52
2.4 Motor 55
Q45 What are the characteristics of some motors? 55
Q46 What is a capacitor single-phase motor and what are its characteristics? 56
Q47 What are the types of single-phase asynchronous capacitor motors? 56
Question 48 How to judge the main winding and auxiliary winding of a three-terminal outgoing single-phase capacitor motor? 56
Question 49 How to judge the main winding and auxiliary winding of a general single-phase capacitor starter motor? 57
How does the 50 tool motor cool? 57
Q. What are the types of 51 series excitation motors and what are their characteristics? 57
What is the working principle of 52 series excitation motor? 57
Q. What are the main characteristics of 53 series motors? 57
What is the basic structure of a 54 single-phase series motor? 58
What is the role and characteristics of each part of the 55 series motor? 58
Q. What are the 56 series ways of field winding and armature winding? 58
Ask 57 how to realize the reverse of single-phase series motor? 58
Q 58 Single-phase series motors are not allowed to start and run at no load. Why are power tools OK? 59
Q 59 What are the types of speed regulation of single-phase series motors? 59
Question 60 How to repair the stator winding and armature winding of a single-phase series-excited motor? 60
Q61 How to check the stator coil of a single-phase series motor? 60
Q62 How to repair the stator coil of a single-phase series motor? 60
Q63 How to check the short-circuit of the stator coil of a single-phase series motor? 60
Q64 How to check the grounding of the stator coil of a single-phase series motor? 61
Ask 65 how to check the armature winding for open circuit? 61
Q 66 how to repair armature winding open circuit? 61
Ask 67 how to find the commutator copper sheet connected to the short-circuit coil? 61
Q68 how to repair armature winding short circuit? 62
Question 69 What are the common faults and maintenance methods of single-phase series motors? 62
Q. What are the common causes of 70 series motors? 64
Q71 How to judge the spark level of a single-phase series motor? 64
Q72 What are the disadvantages of using poor steel sheets? 64
Ask 73 how to judge the quality of steel sheet? 64
Q. How good is the copper wire wound inside the 74 rotor? 64
Q. What are the losses of 75 motors? 64
What is the power equation of the 76 motor? 65
Q 77 how to correct the curved rotor shaft of the capacitor motor? 65
Q 78 how to organize the motor armature? 65
Q79 how to repair the motor rotor shaft loose? 66
Ask 80 how to check whether the motor is leaking? 66
Q. What are the main reasons for 81 rotor winding short circuit? 66
Ask 82 how to judge the short circuit of the rotor winding? 66
Ask 83 what kind of motor winding structure? 66
Ask 84 what is the expanded view of the winding? 66
Q. What is the role of 85 winding unrolled figure? 66
Ask 86 what is the pole pitch and what is the pitch? 67
Q. What are the ways of 87 single-phase motor capacitor wiring? 67
Q. What is the matching of 88 Kellett electric screwdriver motor parts? 68
2.5 Gear 68
Q. What is the role of 89 gear? 68
Q What are the commonly used materials for 90 gears? 68
Q91 What are the types of gears, and what are the common gears for power tools? 69
What are the requirements for the hardness of 92 gears? 69
2.6 Brushes and Commutators 69
2.6.1 Brushes
Q What are the properties of 93 carbon? 69
Ask 94 what is a brush? 69
Q. What does the 95 brush do? 70
What is the structure of 96 brushes? 70
Q. What are the performance and parameters of 97 brushes? 70
Q. How does the main physical parameters of the 98 brushes affect performance? 71
Q. What are the requirements of 99 brushes for springs? 71
Q. What are the requirements for commutator for 100 brushes? 71
What is the pressure of 101 brush springs? 72
Q. What is the required clearance between the 102 brush and the brush holder? 72
Q. What are the characteristics and requirements of the 103 commutator film? 72
Q. What are the types of 104 brushes? 72
Q. What are the characteristics of 105 different brushes? 73
Q. What is the working mechanism of 106 safety brushes? 73
Q107 What are the physical parameters of the main brush materials for 107 electric tool motors? 73
Q. What is the relationship between 108EMI and brushes? 74
Q. What is the relationship between 109EMI and brush post-processing? 74
Q. What is the relationship between 110EMI and other related parts? 75
Ask 111 how to judge the quality of brushes? 75
Q. What should I pay attention to when installing 112 brushes? 75
Q. What are the characteristics of the 113 brush performance mark? 75
Q114 What should I pay attention to before using the brush? 76
Q 115 how to check the brush? 76
Q 116 how to replace the brush? 76
Q. What is the comparison of 117 Morgan Electric refreshing old brushes? 76
Ask 118 what are the application characteristics of some brushes? 77
Q119 What are the appearance characteristics of some brushes? 77
Q. What is the quick check of the application of 120 Qili speed electric screwdriver brush? 78
Q 121 What is the quick check of the application of some brushes in power tools? 79
Ask 122 what is the brush holder? 83
Q. What is the structure of the 123 brush holder? 83
Q124 What are the requirements for brush holders? 84
Q. What is the application of 125 electric tool brush grip? 84
Question 126 What is the quick check of the application of the electric tool brush cover? 85
Q. What is the application of 127 Qili speed electric screwdriver brush holder? 86
What is the cause and treatment of 128 brush chatter? 86
Question 129 What are the causes and treatment methods of uneven brush wear? 87
Q130 How to troubleshoot brush faults related to single-phase series motor? 87
2.6.2 Commutator
Ask 131 what is a commutator? 87
Q132 What is the structure of the 132 power tool commutator? 88
Q. How does the 133 commutator work? 88
What is the role of 134 commutator? 89
Q135 Is there a rule for the diameter of the 135 power tool commutator? 89
Q 136 What is the model naming rule for the 136 power tool commutator? 89
Q. What are the types of 137 commutator? 89
Q. What is the difference between the 138 copper wire hook commutator and the ordinary pressed commutator? 89
Ask 139 what are the requirements for commutator? 89
Q 140 What are the causes of sparks? 90
Q. What is the quick check of the application of 141 commutator in power tools? 90
2.7 Bearing 92
Ask 142 what is a bearing and what does it do? 92
Ask 143 bearing to lubricate? 92
Q. What are the types of 144 bearings and what are their characteristics? 92
Q. What are the characteristics of 145 bearing parts? 95
Question 146 What are the sealing devices for rolling bearings? 98
Q147 What are the common bearing types of power tools? 98
What is the difference between 148 608 bearing and 626 bearing? 98
Q149 What are some bearings for power tools? 98
Q. What are the differences between 150 high quality rocker bearings and low quality rocker bearings? 102
Q151 What are the commonly used tools for mounting bearings? 103
Q 152 What are the common testing tools for bearings? 103
Q 153 What are the methods for installing bearings? 103
Q 154 What are the precautions for the use and maintenance of bearings? 103
2.8 Switch 104
Q What types of switches can be divided into 155? 104
Q. What are the characteristics of 156 common switches? 106
Q. What are the types of 157 switch terminals? 107
Q. What are the signs related to switch 158? 107
Q 159 What are the related concepts and terminology of some switches? 108
Q. What are the main types of 160 power tool switches? 111
Q161 What are the English names and terms of common certifications for power tool switches? 112
Q162 What are the main components of a power tool switch? 112
Question 163 What is the wiring of the built-in controller of the seesaw switch? 113
What is the wiring of the built-in controller of the 1648 hole switch? 113
Q. What is the wiring of the 1658 hole switch external controller? 113
Q 166 how to choose a power tool switch? 114
Question 167 What is the characteristic of the special switch C3C for electric tools? 114
Q. How does the on-off power switch work? 114
What is the main function of the 169 forward and reverse switch? 115
Ask 170 how to judge the quality of the positive and negative switches? 115
What are the parameters of the 171 DC switch for battery-powered tools? 115
Question 172 What are the specifications of the rated current of the DC switch for battery-powered electric tools? 115
Q 173 What are the classifications of DC switches for battery-powered tools? 116
Q. What is the model name of the 174 DC switch for battery-powered tools? 116
Q. What is the representation of the rated temperature of a DC switch for a 175 battery-powered tool? 118
Q. What is the wiring and passing current of the 176 DC switch terminals for battery-powered electric tools? 118
Q. What are the types of screw terminals for 177 DC switches for battery-powered tools? 119
Q. What is the size of the 178 DC switch screw terminals for battery-powered tools? 119
Q. What is the size of the washer or compression plate used in the 179 DC switch screws and bolt terminals for battery-powered power tools? 120
Q What is the size of the DC switch pole terminal block for 180 battery-powered tools? 120
Q. What is the size of 181 DC switch chip terminal blocks for battery-powered power tools? 121
Question 182 What is an electronic speed switch for general power tools? 121
Q183 What is the rated value of the electronic speed switch for general power tools? 121
Q. What are the main faults of the 184 non-speed power switch? 121
Q. What are the characteristics of the 185 speed switch? 121
What is the circuit principle of the 186 speed switch? 122
Question 187 What are the types of electronic speed switches for general power tools? 122
Question 188 What is the type and specification code of the electronic speed switch for general power tools? 123
Q 189 What are the main faults of the speed regulating power switch? 123
Question 190 What is the disconnection mark of the electronic non-automatic reset speed switch for general power tools? 124
Ask 191 how to detect the quality of the switch? 124
Ask 192 how to detect the quality of the start switch? 124
Q. What is the forward and reverse switch and color of 193 Qilisu electric screwdriver? 125
Q. What is the application of 194 Kellett electric screwdriver start switch? 128
Ask 195 what is the quick check of some electric tool application switch models? 128
2.9 Drills, Holes, Chucks, Bits 132
Ask 196 what is a drill? 132
Q. What are the types of 197 drill bits and what are their characteristics? 132
Q. What are the types and uses of 198 engineering thin-wall drills? 136
Question 199 How to solve the impact of engineering thin-walled drills when opening holes? 136
Q. What are the skills of 200 manual sharpening twist drills? 137
Ask 201 how to maintain and maintain the impact drill bit? 137
Q. What are the types of 202 power tool drill chucks? 138
Q. What are the basic requirements for 203 drill chucks? 138
Q 204 What is a batch header and what are its types? 139
2.10 Saw Blades 139
Q. What are the types of 205 sintered circular saw blades? 139
Q. What are the types of 206 welding circular saw blades? 140
Q What are the types of 207 metalworking circular saw blades? 140
Q What are the types of 208 diamond circular saw blades? 141
Q 209 how to choose diamond saw blades? 141
Q 210 how to choose alloy wheels? 141
Q211 What are the characteristics of different tooth saw blades? 142
Ask 212 what is the dynamic working stability of circular saw blades? 142
Q213 What are the factors that affect the dynamic working stability of circular saw blades? 142
Q 214 What are the methods to improve the dynamic stability of the saw blade? 143
Q 215 how to choose a saw blade? 143
Ask 216 how to choose 40 teeth and 60 teeth hard alloy woodworking saw blades? 143
Q. What is the difference between 21730 teeth and 40 teeth cemented carbide woodworking saw blades? 143
Q. What are the differences between 218 multi-tooth and few-tooth wood saw blades? 144
Q. What are the types of 219 wood saw blades? 144
Q 220 What are the factors to consider when choosing an alloy saw blade? 144
Ask 221 how to choose the type of cemented carbide? 145
Question 222 What is the function of several grooves on the outer edge of some diamond cutting blades? 145
Q. Is there a difference in temperature resistance between the 223 dry cutting blade and the wet cutting blade? 145
Q 224 how to choose the matrix of carbide saw blades? 145
Q. What are the types of 225 alloy saw blades? 145
Q 226 how to choose the diameter and outer diameter of the carbide saw blade? 146
Q 227 how to choose the tooth shape of carbide saw blades? 146
Q 228 How to choose the correct saw blade based on the material of the workpiece being cut? 146
Question 229 What is the angle characteristic of the saw tooth? 147
Q 230 how to identify cemented carbide saw blades? 147
Q. Why should 231 alloy saw blades be opened? 147
Q What are the types of wear on the 232 alloy circular saw blade? 147
Q 233 What are the common anomalies of saw blades? 148
Q 234 how to maintain carbide saw blades? 148
Q 235 What are the basic requirements for using alloy saw blades? 148
Q. What are the installation requirements for the 236 alloy saw blade? 149
Q. What are the requirements for the use of 237 alloy saw blades? 149
2.11 Components
Q 238 How does electromagnetic interference of power tools occur? 150
Q 239 how to suppress electromagnetic interference in power tools? 150
Ask 240 how to detect the quality of the fuse? 151
Q241 How to detect fixed resistance? 151
Ask 242 how to detect the chip resistance? 152
Question 243 how to detect a negative temperature coefficient thermistor? 152
Ask 244 how to detect the quality of the potentiometer? 152
Ask 245 how to detect fixed capacitance below 10pF? 152
Ask 246 how to detect electrolytic capacitors? 153
Ask 247 how to detect the starting capacitor? 153
Q Can the capacitors used in 248 motors be replaced by electrolytic capacitors? 153
Ask 249 how to detect a small-capacity chip capacitor? 153
Ask 250 how to judge the quality of large-capacity electrolytic capacitors? 154
Ask 251 how to detect inductance? 154
Q 252 how to detect the chip inductance? 154
Ask 253 how to judge the positive and negative of ordinary diodes? 154
Q 254 how to detect Zener diode? 154
Ask 255 how to judge the quality of the diode? 154
Ask 256 how to use the multimeter method to detect and judge the quality of LEDs? 155
Ask 257 how to judge the polarity of small power full bridge? 155
Ask 258 how to judge the quality of the bridge rectifier? 155
Ask 259 how to judge the transistor is in the amplification, saturation, off state? 155
Ask 260 how to detect the quality of online transistors? 155
Q261 how to detect the quality of the chip transistor? 156
Q262 how to judge the performance of unidirectional thyristors? 156
Ask 263 how to judge the performance of a bidirectional thyristor? 156
Ask 264 how to judge the electrodes of MOS field effect transistors? 156
Ask 265 how to detect the quality of field effect transistors? 156
Q 266 how to detect integrated circuits? 157
Q 267 how to detect the relay? 158
Q 268 how to identify the quality of the battery? 158
2.12 Others 159
Q269 What are the functions and characteristics of the electric hammer conversion electric drill connecting rod? 159
Q. How does the 270 steel ball clutch work? 159
Q. What are the characteristics of some basic components of a 271 power tool? 160
Q 272 What are the application of some basic components of power tools? 160
Chapter 3 Basics of Charging 162
Question 1 What is ampere-hour? 162
Q2 Is there a difference between electricity and energy? 162
Q3 What is power? 162
Q4 What is the battery charging time? 162
Question 5 What is deep discharge? 162
Question 6 What is a cycle? 162
Question 7 What are ECP and EMP? 162
Q8 Why does the battery self-discharge? 163
Q9 What is the principle of the battery circuit board for power tools? 163
Q. What is the performance parameter comparison between Hitachi rechargeable electric tool battery and charger? 163
Q11 What is the performance parameter comparison between Hitachi's rechargeable lithium-ion power tools and chargers? 164
Chapter 4 Electric and Impact Electric Drills 165
4.1 Overview
Q1 What is an electric drill? 165
Q2 What are the concepts of some electric drills? 165
Q3 What is an impact drill? 165
Q4 What are the basic parameters of general electric drills to meet? 165
Q5 How does the electric drill work? 166
Q6 What are the types of electric drill motors? 166
Q7 What are the characteristics of the electric drill handle? 166
Q8 What are the characteristics of the electric drill fan? 167
Q9 How do I troubleshoot the cooling fan? 167
Q10 What are the characteristics of the electric drill reducer? 167
Q11 What are the characteristics of electric drill speed? 167
Q12 What are the characteristics of the electric drill working system? 168
Q13 What are the types of connection methods for the stator coil of the drill and the armature winding? 168
Q14 What are the common accessories for electric drills? 168
Q15 What are the common models and types of electric drills? 168
Q16 What is the relationship between the speed of the drill and the material processed? 169
Q17 How do I know the maximum drilling diameter of an electric drill? 169
Q18 What are the precautions for maintenance electric drills? 169
Question 19 How to check the mechanical failure of the electric drill? 169
Q20How to check electric drill leakage fault? 170
Q21 How to check the circuit fault of electric drill? 170
Q22 What are the causes of common phenomena in electric drill drilling? 170
Q23 How to check the ground fault of electric drill? 170
Q24 How to repair the short circuit of the armature winding of the drill? 170
Q25 How to repair the short-circuit fault of the stator coil winding of single-phase series electric drill? 171
Q26 How to repair the short circuit of the armature winding of a single-phase series drill? 171
Q27 How to detect the ground fault of the armature winding of the drill? 171
Q28 How to repair the ground fault of the armature winding of the drill? 172
Q29 What are the types of the phenomenon that the electric drill brush grip is grounded? 172
Q30 How to check the internal winding of the drill for moisture? 173
Q31 How to repair the damp of the internal winding of the drill? 173
Q32 how to repair the electric drill circuit is open, but can not start under no load? 174
Q33 How to repair the electric drill circuit is open, but can not start when the load? 174
Q34 how to repair the electric drill brush sparks? 174
Q35 How to repair the abnormal spark of commutator of electric drill? 174
Q36 how to assemble bearings? 174
Q37 What is the inspection method for the damage of electric drill bearings? 175
Q38 how to repair electric drill bearings? 175
Q 39 how to remove the damaged bearing of the electric drill? 175
Q40 How to repair the armature spindle gear and reduction gear damage? 176
4.2 Ordinary Electric Drills
Q41 What are the main structures of ordinary hand drills? 176
Q. What is the main structure of the 42 speed drill with forward and reverse rotation? 177
Q43 What is the main structure of light electric drill? 177
What is the internal structure of the 44 hand drill? 177
What is the internal structure of the 45 multi-function hand drill? 179
Q46 What are the common accessories of the multi-function hand drill? 179
Q47 What are the precautions for using a hand drill? 179
Q48 how to choose electric drill? 181
Q49 Can electric drills be used to lift screws? 181
4.3 Rechargeable Electric Drill 181
Q What is the shape of the 50 electric drill? 181
Q. What is the internal structure of a 51 electric drill? 181
Q. What are the types of 52 electric drill reducer and charger? 182
Q53 What are the types of charging drill switch? 182
Q54 What are the characteristics of the rechargeable electric drill? 182
What are the characteristics of 55 lithium battery rechargeable drills? 182
Q 56 how to use a cordless drill? 183
Q57 how to maintain the rechargeable nickel-cadmium battery drill? 183
Q58 how to repair the failure of the battery charging drill? 184
4.4 Impact Electric Drill 184
Q 59 in which fields do electric shock drills have applications? 184
Q. What is the external structure of the 60 impact drill? 184
What is the internal structure of the 61 impact drill? 184
Q. What are the adjustable structures of 62 impact drills? 185
What are the specifications of 63 impact drills? 185
Q. What are the impact mechanisms of 64 impact drills? 187
Q. How does the 65-tooth impact drill work? 187
What is the working principle of the 66 ball impact drill? 187
Q67 What is the difference between an electric hammer and an electric hammer? 187
What are the basic parameters of 68 impact drills? 187
Q69 What are the requirements for the initial starting current of a 69 impact drill? 188
Ask 70 how to judge the strength of the impact drill impact structure? 188
Q71 In what ways do you judge the quality of impact drills? 188
Q72 how to choose the impact drill? 188
Q. What are the common functions of 73 multi-function impact drills? 189
Q 74 how to use the impact drill? 189
Q. How does the 75 multi-function impact drill use a drill? 191
Ask 76 how to use the electric drill to hit tiles? 191
Q77 How much pressure does it take to use an impact drill? 191
Q. How long does the 78 impact drill need to be ground? 192
Q. What are the characteristics of 79 impact drills? 192
Q80 What are the precautions for using impact drills? 192
What should I do if the internal cooling fan of the 81 impact drill turns black? 194
Q82 how to repair the electric motor does not run after the impact drill is connected? 194
Question 83 How can I repair the impact drill to receive abnormal sounds and not rotate or rotate slowly? 194
Q84 How to repair the excessive heat of the impact drill casing? 194
Q85 how to repair the surface of the impact drill rig heat? 194
Q86 how to repair ring fire or large sparks on the impact drill commutator? 195
4.5 Quick Check on Use and Maintenance 195
Q. What are the specifications of 87 Hitachi D6SH electric drills? 195
Q. What are the specifications of 88 Hitachi hand drill D13VH? 195
Q. What are the specifications of some Hitachi D10VG hand drills? 195
Q. What are the specifications of 90 Hitachi D13 spare parts? 196
What is the structural diagram of 91 Makita 6412 electric drill? 196
What is the structure diagram of 92 Makita DP4001 electric drill? 197
Q. What is the structure of the 93 Makita DS4010 electric drill? 197
What is the structure diagram of 94 Makita DS5000 electric drills? 199
Q. What is the structure drawing of 95 Makita DA3010 angle drill? 199
Chapter 5 Electric Hammer and Electric Pick 201
5.1 Electric Hammer 201
Q1 What is an electric hammer? 201
Q2 What does an electric hammer do? 201
Q3 What are the common accessories and structures of the electric hammer? 201
Q4 What is the function of the overload protection device of the electric hammer and what types are there? 203
Ask 5 What is the form and function of the electric hammer safety clutch? 203
Q6 What are the common accessories for hammer drills? 203
Q7 What is the working principle of the crank link air cushion electric hammer? 203
Q8 What is the working principle of the electric hammer of the pendulum mechanism? 204
Q9 What are the working characteristics of electric hammer to break concrete or rock? 204
Q10 What are the types of electric hammer? 204
Q11 What are the requirements for the hammer power connection and external flexible cables and cords? 206
Q12 What are the requirements for basic parameters of electric hammers, and the classification and grouping of electric hammer drills that are unqualified? 206
Q. What is the classification and grouping of 13 sets of electric hammer drills? 207
Q14 What are the main differences between electric hammers and picks? 207
Q15 What are the main differences between electric hammers and electric drills? 207
Q16 What are the differences between electric hammers and impact drills? 208
Q17 What are the characteristics of a good electric hammer? 208
Q18 How to choose an electric hammer? 209
Q19 How to install an electric hammer drill? 209
Q20How to install electric hammer core drill? 210
Q21 How do I remove an electric core drill? 211
Q22 How to drill with an electric hammer? 211
Q23 How to use the electric hammer to drill and drive self-drilling anchors? 211
Q24 How to use the switch of the electric hammer? 212
Q25 How to use the electric hammer auxiliary handle assembly? 212
Q26 How to use the dust cover of the hammer? 212
Q27 How to use a hammer to groove? 212
Q28 How to use an electric hammer to ream? 212
Q29 How to use electric hammer to punch holes in tiles? 213
Q30 How to use electric hammer to punch holes in wood? 213
Q31 How to use a dual-purpose electric hammer? 213
Ask 32 how to prevent the electric hammer from being overloaded? 213
Q33 What are the precautions for using an electric hammer? 213
Q34 how to repair the electrical fault of the hammer? 215
Q35 how to repair the mechanical failure of the electric hammer? 215
Q36 How to repair the reduction of the impact energy of the hammer? 215
Q37 How to repair the abnormal sound of the electric hammer? 216
Q38 How to repair the abnormal sound after the hammer is connected to the power, and the rotation is slow or does not rotate? 216
Q39 How to repair the abnormal start or non-rotation of the motor after the power of the electric hammer is turned on? 216
Q40 how to repair the electric hammer motor overheating or ring fire? 216
Q41 How to repair the electric hammer tool without rotating or impacting abnormally? 216
Ask 42 how to repair the electric hammer only impact and not rotate? 217
Question 43 How to repair the slippage of the electric hammer overload protection device? 217
Q44 How to repair the motor does not run after the hammer is connected to the power? 217
Q45 Why should we use good quality when replacing electric needle bearings? 217
Q46 Why should I clean up the failure point when replacing electric hammer parts? 217
Q47 What is the adaptation of the hammer rotor and stator? 217
Q. What are the specifications of 48 Hitachi Electric Hammer DH30PC2? 218
Q. What are the specifications of 49 Hitachi Hammer DH40MR? 218
Q. What is the structure diagram of 50 Makita BHR200 rechargeable electric hammers? 218
5.2 Electric Pick 220
Q51 What is an electric pick? 220
Ask 52 what is a sleeper electric pick? 220
Q. What are the types of 53 electric picks? 220
Q54 Is there a difference between the electric pick and the hydraulic pump pick? 220
What is the role of the cylinder in the 55 electric pick? 220
How to adjust the 56 electric pick-up governor? 221
Q57 What is the difference between a grease-lubricated and oil-lubricated electric pick? 221
Q 58 how to add grease to the electric pick cylinder? 221
Q59 What are the precautions for using electric picks? 222
Q. What should I do if the 60 electric pick cannot reach the rated input power? 222
Q61 What are the reasons for the electric motor not running after the electric pick-up is connected? 222
Question 62 What are the reasons for abnormal sounds after the electric pick-up, and they do not rotate or rotate slowly? 223
Q. What are the reasons for excessive heat in the 63 electric pick-up gearbox? 223
Q. What are the reasons for the excessive heat on the surface of the 64 electric pickaxe? 223
Q. What are the causes of ring fire or large sparks on the 65 electric picket commutator? 223
Question 66 What are the reasons why the electric pickaxle motor rotates without the impact of the drill or the impact force weakens? 223
Q67 how to repair electric pick-up? 223
Q. What is the structure diagram of 68 Makita HM1801 electric picks? 223
Chapter 6 Cutting Machine 226
6.1 Stone cutting machine 226
Q1 What is an electric stone cutting machine? 226
Q2 What is the structure of electric stone cutting machine? 226
Q3 What are the common accessories for stone cutting machine? 226
Q4 What are the common models of stone cutting machine? 227
Q5 What is the working principle of electric stone cutting machine? 227
Q6 What are the basic parameters of electric stone cutting machine? 227
Q7 What is the meaning of the model of electric stone cutting machine? 227
Q8 What is the common rated voltage and frequency of electric stone cutting machine? 227
Q9 What is the size requirement of the cutting board of the electric stone cutter? 228
Q10 What are the characteristics of the switch operation of a general electric stone cutting machine? 228
Q11 What should I pay attention to when cutting edges of stone cutter blades? 228
Q12 What should be paid attention to when using electric stone cutting machine? 228
Q13 How to repair common faults of marble cutting machine? 230
Q14 What are the specifications of Jinding JD3600C marble cutting machine spare parts? 231
Q15 What are the specifications of Nippon Stone Cutting Machine 96110 and 93110A? 231
Q16 What are the specifications of Hitachi cutting machine CM4SB2 parts? 231
6.2 Profile cutting machine 231
Question 17 What is a profile cutting machine? 231
What is the structure of the 18 profile cutting machine? 231
Q19 What are the characteristics of small steel cutting machines? 232
What are the characteristics of 20 electric aluminum alloy cutting saws? 233
Q21 What is a miter cutting machine? 233
Q22 How do I remove the cutting blade of a profile cutter? 233
Q23 How to install the cutting blade of profile cutting machine? 234
Q24 How to unlock the profile cutter? 234
Q25 How to adjust the bevel angle of the profile cutting machine? 234
Question 26 How to fix and relax the workpiece cut by the profile cutting machine? 234
Q27 How to start and close the profile cutting machine? 234
Q28 How to adjust the depth scale of the profile cutting machine? 235
Q29 What are the safety regulations for cutting machines with movable protective covers? 235
Q What are the spare parts for Hitachi Profile Cutting Machine CC14SF? 237
Q31 What are the spare parts for Hitachi Profile Cutting Machine CC16SB? 237
Q What is the structure drawing of 32 Guoqiang profile cutting machine J1G-NG-355? 237
Q. What is the structure of 33 Makita profile cutting machine LC1230? 239
Chapter 7 Polishers, Polishers, and Sanders 243
7.1 Angle grinder 243
Q1 What are the characteristics of the angle grinding process? 243
Q2 What are the characteristics of abrasives? 243
Q3 What is an electric hand-held angle grinder and what is its application? 243
Q. How does the 4 angle grinder work? 245
Q What are the types of 5 angle grinders? 245
Q6 What is the basis of the specifications of the electric angle grinder? 245
Q7 What are the advantages of speed regulating angle grinder? 246
Q8 How to choose an electric angle grinder? 246
Q What is the internal structure of the 9 angle grinder? 246
Q. What is the application of some structural parts of the 10 angle grinder? 248
Q11 How to choose the grinding plate and slice of the angle grinder? 251
How does a 12 angle grinder turn into an electric drill? 252
Q13 How to realize the fixed operation of the angle grinder? 252
Q14 How to choose the grinding wheel of an angle grinder? 252
Q15 What are the precautions for installing and removing the wheel cover? 252
Q16 How to install a grinding wheel? 253
Q17 How to install the side handle and operation switch? 253
Q18 What are the precautions for installing angle grinders? 253
Q19 What are the precautions for using an angle grinder? 253
Q20 How to maintain the angle grinder? 255
Q21 How to judge the leakage of the angle grinder? 255
Q22 How to solve the tingling of the hand caused by the strong vibration of the angle grinder? 256
Q23 What is the reason why the angle grinder generates heat in 2 minutes? 256
Q. What is the reason why the 24 angle grinder does not respond when plugged in? 256
Q. What are the specifications of 25 Nippon Angle Grinder LGC106 parts? 256
Q26 What are the specifications of Hitachi Angle Grinder PDA100K parts? 256
Q27 What is the structure diagram of Jinding angle grinder JD3029C? 257
7.2 Electric Grinders and Polishers 258
Q28 What are the common parts and accessories of the polishing machine? 258
What is the role of 29 electric belt sander? 258
Q30 What are the main structural parts of electric belt sander? 258
Q31 What is the classification of the electric belt sander specifications? 258
Q32 how to choose the belt of electric belt sander? 259
Q33 how to choose the speed of electric belt sander? 259
Q34 What are the precautions for using an electric belt sander? 259
Q35 How to repair the motor does not turn after the electric belt sander is powered on? 259
Q36 How to repair the commutator of electric belt sander with large sparks or ring fire? 259
Question 37 How to maintain the belt of the electric belt sander motor without turning? 260
Q38 What is a wet sander? 260
39260
40260
41 261
42 261
43 261
44 262
45 262
46 262
47 264
48 264
49 265
50 266
51 266
52 266
53 266
54 266
55 266
56 266
57GD0601 267
58903 268
59JD3322C 268
7.3271
60 271
61 272
62 273
63 273
64 273
65JD2665C 1-2 274
66GV6000 274
679032 274
68BO3700 278
7.4280
69 280
70 281
71 282
72 282
73 283
74 283
75 283
76PV7000C 283
8286
1 286
2 286
3 287
4 287
5 288
6 288
7 288
8 289
9 289
10 290
11 290
12 292
13 293
14 293
15 294
16 295
9296
9.1296
1 296
2 296
3 297
9.2297
4 297
5 299
6 300
7 300
8 302
9 302
10 302
11 303
12 303
13 303
14CJ110M 304
15CJ110MV 304
16JD2839C 65 304
9.3306
17 306
18 307
19 308
20 308
21 308
22 309
23 309
24 309
25 309
26 310
27 310
28 310
29 310
30 311
31 311
32 313
33 313
34 314
35 314
36 314
37 314
38 314
39 315
40 315
41 315
42C10FCH 315
43C18DMR 316
44C6DD 316
45C7U 317
46C9U 317
475900BR 317
9.4320
48 320
49 320
50 320
51UC3030A 320
9.5322
52 322
53 323
54 323
55 324
56 325
57 325
58 325
59 326
60CR18DV 326
61CR24DV 326
62JR3070CT 326
10329
1 329
2 330
3 330
4 331
5 332
6 333
7 333
8 334
92 334
10 335
11 335
12 335
13 335
14 335
15 335
16 336
17 336
18 336
19 336
20 336
21 336
22GR20282 336
231911B 337
11338
11.1338
1 338
2 338
3 338
4 339
5 339
6 340
7 341
8 342
9 343
10 343
11 343
12 344
13 344
14 344
15 344
16 345
17 345
18 345
19 345
20 345
21 346
22 346
23 346
24 346
25 347
26 347
27 347
28 347
29 347
30348
31AP348
32ZW280 349
11.2349
33 349
34 349
35 350
36 350
37 350
38 350
39DAADOA 351
12353
12.1353
1 353
2 355
3 355
4 355
5 355
6 356
7 356
8 357
9 358
10 358
11 358
12 358
12.2359
13 359
14 359
15 360
16 361
17 361
18 361
19 362
20 362
21 363
12.3363
22 363
23 364
24 364
25 364
26 365
12.4365
27 365
28 365
29 366
30 367
31 367
32 367
33 367
13368
1 368
2 368
3 368
4 369
5 369
6 370
7 370
8 371
9 371
10 371
11 371
12 371
13WKS8000 371
14373
1 373
2 373
3 373
4 373
5 374
6 374
7 374
8 375
9 375
10 376
11 376
12 376
13 377
14 377
15 377
15379
1 379
2 379
3 379
4 380
5 380
6 380
7 380
8 382
9CE16SA 382
10CN16SA 383
16384
1 384
2 384
3 384
4 385
5 386
6 386
7 386
8 386
9 387
10 387
11 387
12 388
13 388
14 388
15 388
16 388
17 389
18 389
19 389
20 390
21 391
22 392
23PCB 392
24PCB 392
25 392
26 392
27 393
28 393
29 394
30 394
31 394
32 395
33 395
34 395
35 395
36 396
37EMC BOX 396
38 396
39 396
40 396
41 398
42 401
43() 403
44 403
45 404
46// 405
47 406
48 406
49 407
50 407
51 408
52 408
53 409
54 409
55 410
56 410
57 411
58 411
59 414
60 P1L-BSD-1000 414
61BTS130RFE 415
62TD020DS 416
63HIMAX CLT-50/ CLT-50S 417
17418
1 418
2 419
3 419
4 420
5 420
6 420
7 421
8 421
9 422
10TW1000 422
18425
1 425
2 426
3B13S 427
43901 427
53612C 427
63703 427
7JD2543C 427
8JD2517C 431
9UB1100 431
10MT400 431
11BCL140 434
12UT2204 434
136924N 434

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