Sutton Step Drill HSS Spiral 4-12mm, 4-20mm and 4-30mm (9 to 14 Steps)

Sutton Tools is an Australian-owned manufacturer of precision cutting tools and threading accessories, supplying tradespeople, engineers, and manufacturing operations across Australia and internationally. Their product range spans taps, dies, drills, endmills, holesaws, and related tooling — all engineered to perform consistently under real industrial conditions. AIMS Industrial supplies the Sutton Tools range to Australian businesses as part of our commitment to stocking quality, trusted brands.

Sutton step drill bits produce multiple hole sizes with a single tool in sheet metal and thin material, reducing the need for multiple drill changes in trade and electrical installation work.

Where this product is used

Used in electrical, HVAC, and sheet-metal fabrication for producing clean, burr-free holes in thin steel, aluminium, and stainless sheet without pilot drilling.

• Drilling cable entry, conduit, and gland holes in electrical switchboards, junction boxes, and enclosures in sheet steel and aluminium.
• Producing stepped or sized holes in thin sheet metal during HVAC duct fabrication, stainless benchtop work, and light structural fabrication.
• Enlarging existing holes to a precise size in sheet materials without the need to change to a larger standard drill.

Key specifications

Selecting the right option

Step drills are designed for thin material — their stepped profile is less effective in plate over about 3–4 mm thick. Use at lower speeds than a standard drill bit, with light feed pressure and no cutting fluid required for most applications. Select the step size range that covers the hole sizes you most commonly need.