SOLID CARBIDE DRILLS 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 DAT DAT 20° 10˚  0.02 Shank 2 Secondary Clearance 2 Secondary Clearance DAT DAT 20° 25° 3 Chisel 3 Grind chisel (Thinning) 35° 30° C 40° 4 Edge Preparation 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 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/cm3) 5 Cutting fluid emulsion 3% 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