Page 425 - THREADING CATALOG
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USER GUIDE
THREAD DRILLING
Regrinding Instructions for AH Geometry
For each grinding operation, rotate the drill 180° and repeat the grinding procedure.
1 Primary Clearance
2 Secondary Clearance
3 Chisel
4 Edge Preparation
Grinding Wheel Recommended Specifications:
1 Diameter grinding wheel: GA2.
2 Grinding wheel bond: synthetic resin.
3 Grit size: 325/400 mesh (45/38µ).
4 Diamond concentration: C-75 (3.3 carat/cm ).
3
5 Cutting fluid emulsion 3%.
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