Page 49 - HOLE_MAKING_CATALOG_INCH_2022_P187-P236

USER GUIDE

Regrinding Instructions

Regrinding Instructions for AH Geometry Regrinding Instructions for 3 Flute SCCD Drills
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 SOLID CARBIDE DRILLS
DAT
DAT
AT
D
20°
10˚
 .0008” Shank
2 Secondary Clearance
2 Secondary Clearance
DAT DAT

20°
20°
25°
25°
3 Chisel
3 Grind chisel (Thinning)

35°
30°
C
40°

4 Edge Preparation
Ø.0098-.021”
C D range
0.011-0.015 0.157-0.314
R .0004-.0008”
0.019-0.023 0.315-0.472
4 Edge Preparation (Honing)
DAT R
Grinding Wheel Recommended Specifications: A
1 Diameter grinding wheel: GA2 A
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% R D Range
.0013-.0017 0.157-0.236
.0017-.0021 0.236-0.472
Grinding Wheel Recommended Specifications:
1 Diameter grinding wheel: GA2
2 Grinding wheel bond: synthetic resin
3 Grit size: 325/400 mesh (45/38µ)
3
4 Diamond concentration: C-75 (3.3 carat/cm )
5 Cutting fluid emulsion 3

233