
| Regrinding Instructions for SCDT | GYRO Auxiliary Devices for Lathe Machines |
| Pre-Thread Solid Drills | |
| Designed to Correct Misalignment | |
| For each grinding operation, rotate the drill | on Stationary Operation |
| 180° and repeat the grinding procedure. | |
| Drills can be used on sloped surfaces up to 6°. | |
| When drilling sloped surfaces of more than 6°, | |
| reduce feed by 30-50% during penetration of up | |
| 45° to 5 mm depth, or use a spot or pre-hole drill to | |
| 7°ÊspiralÊrelief avoid drill deviation or poor drill performance. |
1 Primary Clearance T.I.R. max. 0.02
a° D Range 7 0.8-6.0 10 >6.1 2 Secondary Clearance
Angular Adj. 1°
Radial Adj. D2.0
3 Chisel
| a° | D Range |
| 100 | 3.0-4.8 |
| 105 | 4.9-10 |
| 95 | 10.1-20 |
4 Edge Preparation
| R | D Range |
| 0.02 | 0.8-6.0 |
| 0.03 | 6.1-18.0 |
| 0.04 | 18.1>UP |
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%