1) Be sure to choose the right
wheel and grinding conditions. When
in doubt, always use a softer wheel
and lower circumferential speed.
2) Always grind against the
cutting edge and keep pressure low.
3) The grinding sequence should
be as follows; rake face, minor clearance
face, major clearance face, cutting
edge corner, chip breaker (chip groove)
and chamfers (lands).
4) The shaft clearance angle
should exceed that of the carbide
tip by 2°
5) Wet grinding is letter than
dry grinding. The cutting edge needs
an abundant, continuous flow of coolant.
6) In dry grinding, use moderate
pressure in order to prevent tool
heatup. Never quench a hot tool!
7) When grinding with periphery
wheels, use a big wheel size and tilt
fool up and down to prevent concavity.
Grinding the clearence face with a
periphery wheel
Incorrect:
Clearance face concavity produced
by grinding ruduces lip angle.
Correct:
Grinding by produces a fiat clearance
face.
Clearance angle
Lip angle
True rake angle
8) Grind the BÖHLER tip in
two stages: a) Pregrind with a medium-mesh
SIC wheel b) Pinish grind with a fine-mesh
SIC cup wneel, if possible wth a diamond
wheel.
9) Dress the edges tools intended
for steel machining.
10) Check with template it
tool angles have been ground as specified.
11) Keep wheels in good grinding
and true running condition on by trueing
them in time.
Brazing
Carbide Tips
Clearance angle
Lip angle
True rake angle
