China Long Wood Drill Bit Countersink SDS Plus Drill Bits Max Hammer Threaded Drill Bit, Find details about China Drill Bit, Plus Chuck Drill Bits from Long Wood Drill Bit Countersink SDS Plus Drill Bits Max Hammer Threaded Drill Bit
Main details:
HSS straight/taper shank drill bits
1. Standard: DIN338, DIN1897, DIN340; 1/16"-1" for ASME, screw machine, taper length. |
2. Steel material: M2(6542), M35, M42, HSS9341, HSS4341, HSS 4241 |
3. Process: Fully ground, milled, polished, roll forged |
4. Point angel: 118degree, 118degree split point, 135degree split point |
5. Surfce finishing: Bright finished, black oxide, Tin-coated, black & white, black & gold, coffee color. |
6. Shank: Straight shank, reduced shank, taper shank |
7. Hardness: 63-66HRC |