Page 426 - THREADING CATALOG
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USER GUIDE
THREAD DRILLING 1 for each grinding operation, rotate the drill 180° and repeat the grinding procedure
Regrinding Instructions for SCDT Pre-Thread SOLIDDRILL
45°
7°ÊspiralÊrelief
Primary Clearance
a° D Range
7 0.8-6.0
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/cm ).
3
5 Cutting fluid emulsion 3%.
ISCAR
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