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Sharpening, machining and maintaining circular saw blades correctly Know how – circular saws
Professional care and maintenance is the key to an effective and productive use of your carbide or high-speed steel circular saws. With the correct grinding technique and machine this is no problem.
As a rule, tooth faces are sharpened straight; however sometimes they are also sharpened at an angle.
Tooth face machining also includes hollow face grinding. This is carried out using a grinding point at high speed. However, this method cannot be used for every circular saw blade. There must be a certain amount of chip space available in order to be able to sharpen the tooth face using peripheral grinding. In particular, it must be ensured that the grinding point is positioned exactly in the middle of the saw blade diameter and the cutting width.
With the correct grinding machines for machining tooth faces and tooth tops, you can achieve perfect grinding results!
Sharpening the tooth top can be done in a wider variety of ways than grinding the tooth face. The geometries can be designed to be straight to almost round, depending on the range of applications of the carbide-tipped circular saw blade. The tooth top is sharpened with a face grinding or peripheral grinding process.
Sharpening using a face grinding process is particularly time-saving. Using this method, the grinding wheel must simply be turned through a certain angle in order to produce a wide range of tooth shapes (such as trapezoidal, roof, etc.).
Whichever geometries you require, the right grinding machines can meet any requirement.
The flanks of a saw tooth are ground to a tapered shape in the cutting and feed direction, in order to prevent the cutting edges from pressing into the material. The precision of the tooth flanks significantly influences the surface quality. Grinding is carried out once when the circular saw is manufactured using a face grinding or peripheral grinding process.
The body of carbide-tipped circular saw blades consists of pretensioned tool steel. Raw saws have a tip groove, onto which no cutting plates made of carbide can be precisely soldered. Soldering takes place during production using automatic machines. However, for service work, it is carried out manually with the aid of machines, as this only involves replacing individual broken cutting edges. Silver or a sandwich alloy is used as solder.
Resistive-soldering equipment is used most frequently during repairs on circular saw blades. Defective teeth can also be removed with this equipment.
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