DESCRIPTION
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Features:
- High hardness, unique stepped structure, a drill can open a variety of size aperture.
- Suitable for these work-pieces that hardness is lower than 25 degree and the thickness is beyond 4mm, such as aluminum parts, insulation board, PVC plate, etc.
- The central punch is not needed, small shaking, hard to be broken.
- Used with pistol drill or bench drill, water it to cool while working to prolong its life, the proper drilling speed is 250-400 rpm.
Specifications:
- Material: HSS 4241
- Shank: hex shank
- Shank diameter: 6mm
- Groove: spiral
- Surface treatment: Nitriding black
- Step quantities Step diameter Net weight
- 001 5 steps 4, 6, 8, 10, 12mm approx. 20g
- 002 9 steps 4, 6, 8, 10, 12, 14, 16, 18, 20mm approx. 42g
Package Included:
- HSS Hex Shank Nitriding Black Spiral Groove Step Drill Bit (2/3PCS choose your need)
Some key words about the product:
Step Drill Bits
HSS Industrial Drill Bits
HSS Industrial Drill Bit Drill Bits
Unbranded Drill Bit Power Drill Bits
Power Drill Bits
Diamond Drill Bits