13
Cross- or facet drills
Main cutting edge:
Let the drill project outside the prism, depending on it’s diameter as writen on page 10
but align the
cutting edge parallel to the straight marking
line (see pic. 12 pos. 2)
Clearance angle adjustment (Pic 15) to 0 and fix
with star knob screw in hole A. (Pic 6)). Prism
support to 118º prism rest to 0. Now move
forward with prism feed and sharpen the first
edge. ote the number. Move back, turn the prism
for 180 ° and go forward to the same No.
Grinding of the back.
: Fix star knob screw in
hole B and repeat the grinding operation.
Web thinning:
Fix star knob screw in hole C (pic. 6) and prism rest to –30. By moving the prism feed and
left outer side of the grinding wheel, thin the web on both sides of the drill.
Содержание BSG 60
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