
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/cm3) 5 Cutting fluid emulsion 3%
For each grinding operation, rotate the drill 180° and repeat the grinding procedure. 1 Primary Clearance DAT DATDAT
20° 10˚ 0.02 Shank 2 Secondary Clearance DAT DAT
20°20° 25°25°
3 Grind chisel (Thinning) 35° 30° C 40°
Ø0.25- 0.55 mm C D range 0.3-0.4 4.00-8.00 0.5-0.6 8.01-12.00 4 Edge Preparation (Honing)
| 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