• Made of HSS-G high-speed steel.
• Spiral flutes for efficient chip evacuation.
• Stepped design for progressive drilling with a single tool.
• Smoother, more stable cutting in sheet metal.
• Visible diameter marking for quick identification.

The HSS-G step drill with spiral flutes is a high-performance professional tool designed to offer greater cutting efficiency and chip evacuation in progressive drilling of sheet metal.

Made of HSS-G high-speed steel, it allows multiple diameters to be drilled with a single tool thanks to its stepped conical geometry. The helical flutes improve chip evacuation compared to straight-flute versions, giving a smoother drilling action and reducing material build-up. Its design favours cutting stability and a good hole finish. It is aimed at professional work requiring repeatability and dimensional control in thin-gauge drilling.

Technical specifications:
· Split Point cutting geometry to DIN 1412 C.
· Accurate centring and stable cutting start.
· CBN-ground with spiral chip-evacuation flutes.
· Smooth cutting with less noise, vibration and burr formation.
· Radially adjusted, CBN-ground steps.
· Laser-marked steps for controlled drilling.
· Suitable for sheet metal up to 4 mm thick.
· Bright finish.
· Cutting angle 118°.
· Cone angle 90°.
· Right-hand cutting.
· 3-flat shank.
· Range: Superior.

Recommended applications:
· Main: steel, aluminium, nickel silver, PVC.
· Secondary: cast iron, bronze.