What Is a Bench Grinder?

The desktop grinder is a common equipment for sharpening various tools and tools. In addition to some common requirements of grinding machine tools, the grinding machine also has the characteristics of high speed, simple structure, wide application area, and generally manual operation. The grinding machine is frequently used in the production of cutting tools, and generally does not have fixed personnel to operate. The maintenance is poor, and injuries caused by failure to comply with safe operating procedures during grinding operations also account for a considerable proportion.

Desktop grinder

"Grinding Machinery Safety Regulations (GB4674-84)"

"General Rules for Safety of Abrasives (GB2494-2003)"

1. The user must abide by the "General Rules for Operation of Metal Cutting Safety Technology"

2. The user must be familiar with

The motor does not rotate (there is an electromagnetic sound)

Causes: 1. The starting capacitor is damaged; 2. The three-phase power is out of phase; 3. The power switch is damaged; 4. The bearing is stuck; 5. The winding is burned out

Exclusion method: 1. Replace new capacitor; 2. Check circuit; 3. Replace power switch; 4. Replace bearing; 5. Repair winding

Motor does not rotate (no electromagnetic sound)

Causes: 1. Power switch is damaged; 2. Power failure; 3. Winding is burned out

Remedy: 1. Replace the power switch; 2. Wait for power; 3. Repair the windings

Grinding wheels are fragile or worn too fast

Causes: 1. Incorrect grinding wheel type; 2. Expired or poor quality grinding wheel; 3. Bearing damage; 4. Incorrect installation

Exclusion method: 1. Replace the grinding wheel corresponding to the type; 2. Replace the qualified grinding wheel; 3. Replace the bearing; 4. Correctly install

The sound is abnormal

Causes: 1. Serious bearing wear; 2. Incorrect installation of the grinding wheel; 3. True phase operation; 4. Winding failure

Exclusion method: 1. Replace the bearing; 2. Install the grinding wheel correctly; 3. Check the power supply; 4. Check the winding

Winding burned out

Causes: 1. Stator and rotor scavenging; 2. Three-phase motor running out of phase; 3. Single-phase motor incorrectly connected to 380V power supply

Exclusion method: 1. Replace the bearing; 2. Check the power supply; 3. Check the power supply