Products
Technical Specifications

The rake angle influences the quality of the cut, feed and required cutting power. It always correlates to the desired entry and exit angles to the work surface.
The size of the front rake angle depends on:

• The material to be processed (front rake angle decreasing: softwoods - hardwoods - chip materials - NE-metals)
• The respective cutting quality required on one or both edges
• The blade projection and tool diameter

Positive Rake Angle:

• Easy cutting action - fast cutting
• Cutting power in direction of the worktable (handheld circular saw)
• Work surface edge clean on the underside (without splinter) poor on the upside

Negative rake angle:

• Clean cutting action – requires more cutting power from the motor
• Cutting power in direction of the work piece support (crosscut saws)
• Work piece edge on the upside better than on the underside

If the clearance angle is too low, chip removal by the next tooth is not possible. Large clearance angles facilitate large chip removals. This is necessary for fast feed rates. Small clearance angles allow only minor chip removal, give smoother cuts and require slower feed rates.

In most cases (primarily with circular saws) the exit angle is unfavourable in contrast to the entry angle. For this reason the „good side“ should be placed so it is opposite to that of the saw blade exit side.

With increasing saw blade projection, the quality on the exit side decreases. It does not however improve on the entry side, due to the lack of blade guidance effect. The optimum saw blade projection above the work piece ranges from approx. 8 to 10 mm.