Description
- Step drill bits Size: 6-60mm (12 steps: 6,10,15,20,25,30,35,40,45,50,55,60mm). Shank diameter: 13mm.
- Step drill Material: HSS 4241 High hardness.
- Application: The step suitable for workpieces with hardness under 25° workpiece, such as carbon steel, sheet iron, insulation boards, PVC boards, planks, and wood. The workpiece thickness under 5mm.
- Notice:Use water cooling in drilling to extend bit life.Recommended drill speed 250-400rpm.
- Spiral grooved Cutting Flute: 135 Split point tip and double fluted design for self-centering and deburring, Spiral groove helps to clear chips while drilling.
