DIY Knowledge - Router bits

Router bits

Fräser

Fresas

Fraises

Application tools with one or several flutes. They rotate at motor speed and are connected to the motor shaft by a collet.

The production and use of router bits is governed by rules laid down by the employer?s liability insurance associations.

The router bit geometry largely determines its properties:

Flutes
Router bits with one flute were
developed to improve chip clearance
on bits with very small diameters.
Two flutes are standard for average
and large Ø. Here TC tips can be
brazed on. 3-flute bits can produce
very smooth results at low power.

Angles on router bits
Interaction of different angles:
The hook angle g affects the chip
clearance, the chip pocket b on the cutter
affects the service life and the radial relief
a affects the quality of the cut.
The cutting angle results from b and g.

Router bits, cutting depth limitation
The regulations of the German
Woodworkers Association specify:
Limitation of the chip gap a (dependent
on tool diameter). Limitation of chip
depth b to 1.1 mm and ?more or less
circular shape? (C = 0.6 x Ø max) for
safe working with little kick-back.