Alpha Onsite+ Step Tip Step Cutter Range
The Alpha Onsite+ Step Tip Step Cutter represents the next evolution in drilling technology, designed to solve the two biggest limitations of standard step drills: speed and depth. Unlike conventional step bits which top out at 4mm thickness, this cutter can power through materials up to **10mm thick**. Driven by four high-performance cutting edges and a patented "Step Tip" that eliminates pre-drilling, it drills up to **6x faster** while automatically deburring as you go. Coated with premium AlCrN for extreme heat resistance, this is the ultimate tool for heavy-duty onsite fabrication.
Features:
10mm Cutting Depth: Engineered with extended step heights that allow you to drill through thick workpieces (up to 10mm), unlike standard step drills which are limited to thin sheet metal.
6x Faster Drilling: Features four high-performance cutting edges instead of the standard two, allowing the bit to remove material rapidly with significantly less feed pressure required.
Patented Step Tip: The unique tip geometry bites instantly into the material, completely eliminating the need to centre punch or drill a pilot hole, even on curved surfaces.
AlCrN Multi-Layer Coating: Coated with Aluminium Chromium Nitride (AlCrN) to provide superior thermal stability and wear resistance, ensuring the cutting edges stay sharp even when drilling stainless steel.
3-Flat Shank: Designed with a 3-flat shank that locks securely into the chuck jaws, ensuring optimal power transmission and preventing the bit from spinning under high torque.
Available Models:
4 - 12mm (9STM4-12DSD)
Steps: 8 (4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 11.0, 12.0mm)
8 - 20mm (9STM8-20DSD)
Steps: 7 (8.0, 10.0, 12.0, 14.0, 16.0, 18.0, 20.0mm)
9 - 19mm (9STM9-19DSD) Cable Gland Sizing
Steps: 6 (9.0, 11.0, 13.0, 15.0, 17.0, 19.0mm)
3.3 - 10.2mm (9STM3.3-10.2DSD) - Tapping Drill Sizes
Steps: 6 (3.3, 4.2, 5.0, 6.8, 8.5, 10.2mm)
Perfect for pre-drilling holes for M4 to M12 taps.
Important: The use of quality cutting fluid is mandatory when drilling metals to prevent heat buildup and maximize tool life.