Spiral Step Drill, Improves Sharpness and Stability
Spiral Drill Features
Material: Cobalt High Speed Steel HSS-CO (TiAIN Titanium Nitride Aluminum Coating)
Titanium Nitride Aluminum Coating: Outstanding abrasion resistance and heat resistance, no coolant water needed.It is excellent even without cutting oil, but we recommend using cutting oil for long lasting use.
Reference RPM:
Soft Iron, 2400-320 Stainless Steel, 1200-160 Copper, Coating, 4800-640 Plastic 1200-160