Frequently asked questions.

Frequently asked questions.

Sharpening of woodworking carbide insert welding tooth saw blade?

Cemented carbide is hard and brittle, so great attention should be paid in the process of transportation, installation and disassembly to avoid damaging the serrated blade and personal injury. Usually, the grinding work of the woodworking saw blade is completed by the maintenance workers of the buyer, but it is very important to know the necessary knowledge.

Circular saw blades
Woodworking saw blade corresponding to the front angle Type of saw blade Universal saw Electronic cutting saw Single stroke Double stroke Solid wood saw Solid wood slitting saw Solid wood cross-cutting saw Slotting saw
Front angleα 12 15 0 12 18 15 15 15

When does woodworking saw blade need sharpening?

  • If the sawing quality does not meet the requirements, such as burr or roughness on the surface of the product, it needs to be sharpened immediately.
  • When the alloy edge is worn to 0.2mm, it must be ground.
  • Push material hard, paste time.
  • Abnormal noise.
  • When cutting, the saw blade has the phenomenon of sticking teeth, dropping teeth and chipping teeth.

How to sharpen woodworking circular saw blade?

  • The grinding is based on grinding the back of the tooth, and the front of the tooth is paved. There is no special requirement on the side of the tooth.
  • After grinding, the condition that the front and back angles remain unchanged is that the angle between the working face of the grinding wheel and the front and rear tooth surfaces to be grinded is equal to the grinding angle, and the distance that the grinding wheel moves is equal to the grinding amount. To make the working surface of the grinding wheel parallel to the serrated surface to be ground, and then gently contact, and then make the working surface of the grinding wheel away from the tooth surface, then adjust the working surface angle of the grinding wheel according to the grinding angle, and finally make the working surface of the grinding wheel contact with the tooth surface.
  • The grinding depth is 0.01-0.05 mm in rough grinding; The feed rate is suggested to be 1-2 m/min.
  • Manual fine grinding of serrations: after a small amount of wear and chipping on the tooth edge and grinding the serrations with silicon chloride sand wheel, if it is still necessary to grind the serrations, hand grinder can be used to fine grind the serrations to make the tooth edge sharper. In fine grinding, the force should be uniform, and the working face of the grinding tool should be kept parallel when the grinding tool moves back and forth. The grinding amount should be consistent to ensure that all tooth tips are in the same plane.

Front angle grinding

Remove gum and impurities

Rear angle grinding

Rear angle grinding

Comparison of grinding durability of woodworking saw blade

Comparison of grinding durability of woodworking saw blade

What is used to sharpen woodworking saw blades?

A professional automatic grinding and sawing machine, resin CBN grinding wheel, manual grinding and sawing machine and universal grinding machine.


  • Before grinding, remove the resin, debris and other debris stuck on the saw blade.
  • The original geometric design angle of the saw blade should be strictly followed to avoid damage to the tool caused by improper grinding. After grinding, it can be put into use only after passing the inspection, so as to avoid personal injury.
  • If manual grinding equipment is used, it is necessary to have an accurate limit device and detect the tooth surface and tooth top of the saw blade.
  • Special coolants should be used for lubrication and cooling during grinding, otherwise, the service life of the tool will be reduced, and even the alloy tool head will have an internal crack, which will lead to dangerous situations.

In a word, the grinding process of cemented carbide saw blade is different from that of the ordinary circular saw blade. When the grinding rate is high, the grinding heat is high, which not only makes the cemented carbide crack but also has poor grinding quality. Through reasonable grinding and use, the service life of the saw blade can be greatly extended (generally about 30 times of regrinding), the requirements of processing technology can be better met, the manufacturing cost can be effectively reduced, and the production efficiency can be improved.