What Is a Crown Saw?

Legend has it that Luban invented the saw because he was scratched by a blade of grass. It is said that July 12th, 2007 was Luban's 2514th birthday. So, was the invention of the saw less than 2,500 years ago? But according to archeological findings, the invention of the saw took much longer.

[jù]

Radicals: crotch strokes: 8 total strokes: 13

Wubi 86: QNDG Wubi 98: QNDG

Saw # jù [Interpretation]

Used to cut wood,

Kangxi dictionary

"Tang Yun", "Ji Yun", "Yun Hui" and "Zheng Yun" have their homes cut and sounded. "Said the text" gun Tang also. From Jin Jusheng. "Guang Yun" knife and saw. "Ancient History Examination" Mencius saw. "Orthodox Word" iron leaves are , its teeth one left and one right, with a piece of solution wood stone also. The poem "Zhou Song · Establishment and Essays" industry, Jie industry, such as sawtooth. In "Qian Han · Fang Fa Zhi", I used a knife and saw. "Note" knife, cut off. Saw, slap too.
And "Jade articles" interpretation also. ^[2]

Saw <; name>

Knife saw

Wind discipline buckle, fly

Power is divided into two categories, namely manual saws and external power saws; and external power saws vary according to the age.

How to choose the right saw blade

1. Basic data: machine spindle speed, processed workpiece thickness and material, outer diameter and diameter (shaft diameter) of the saw blade;

2. Selection basis: Calculated by the spindle rotation speed and the diameter of the quasi-matching saw blade. Cutting speed: V = × outer diameter D × revolution N / 60 (m / s). Reasonable cutting speed is generally 60-90 m / second,

Specific recommendations:

Material cutting speed

Cork 60-90 (m / s)

Hardwood 50-70 (m / s)

Particleboard, plywood 60-80 (m / s)

Excessive cutting speed, large machine vibration and noise, reduced saw blade stability, reduced processing quality, reduced cutting speed, and reduced production efficiency. At the same feeding speed, the cutting amount per tooth increases, which affects the machining quality and the life of the knife and saw. Because the saw blade diameter D and the spindle speed N are power functions, in practical applications, it is most economical to increase the rotation speed reasonably and reduce the saw blade diameter.

3. Quality-price ratio:

As the saying goes: "Cheap is not good, good is not cheap." It may be true for other products, but it may not be true for cutting tools; the key is matching. Many factors on the job site: such as equipment cutting objects, quality requirements, personnel quality, etc. Carry out a comprehensive assessment, and choose the best use of things rationally, just to save expenses, reduce costs, and participate in industry competition. This depends on the mastery of professional knowledge and understanding of similar product information.