Page 35 - HOLE MAKING CATALOG p149-184
P. 35
USER GUIDE SOLID CARBIDE DRILLS
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°,
45° 7°ÊspiralÊrelief reduce feed by 30-50% during penetration of up
1 Primary Clearance to 5 mm depth, or use a spot or pre-hole drill to
avoid drill deviation or poor drill performance.
T.I.R. max. 0.02
a° D Range Angular Adj. 1°
7 0.8-6.0 Radial Adj. D2.0
10 >6.1
2 Secondary Clearance
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%
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