Page 34 - HOLE MAKING CATALOG p149-184

SOLID CARBIDE DRILLS USER GUIDE

Regrinding Instructions Regrinding Instructions for 3 Flute SCCD Drills
Regrinding Instructions for AH Geometry
For each grinding operation, rotate the drill
For each grinding operation, rotate the drill 180° and repeat the grinding procedure.
180° and repeat the grinding procedure.
1 Primary Clearance 1 Primary Clearance DAT

2 Secondary Clearance DAT

3 Chisel 20°
10˚
4 Edge Preparation
2 Secondary Clearance  0.02 Shank
Grinding Wheel Recommended Specifications:
1 Diameter grinding wheel: GA2 DAT DAT
2 Grinding wheel bond: synthetic resin
3 Grit size: 325/400 mesh (45/38µ) 20°
4 Diamond concentration: C-75 (3.3 carat/cm3) 25°
5 Cutting fluid emulsion 3%
3 Grind chisel (Thinning) 35°

30°
C
40°

C Ø0.25- 0.55 mm
0.3 - 0.4
0.5 - 0.6 D range
4.00 - 8.00
4 Edge Preparation (Honing) 8.01-12.00

DAT R
A
A

R D Range
0.035-0.045 4.00-6.00
0.045-0.055 6.01-12.00

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/cm3)
5 Cutting fluid emulsion 3

182 ISCAR