RUKO Step Drill Bit HSS TiAlN 8 Steps 6-30.5mm PG

Drilling clean, perfectly round holes in thin sheet metal for cable glands can be frustrating—standard twist bits wander, grab, and leave burrs. This step drill bit solves that by combining a self-centering tip with eight precisely graduated steps, letting you create smooth, burr-free holes from 6 mm up to 30.5 mm in a single tool.

Who is it for

Electricians, panel builders, and metalworkers who regularly install PG cable glands in enclosures, cabinets, or sheet metal. If you need multiple hole sizes without changing bits, this is the tool for you.

Main features

• High-speed steel (HSS) body with titanium aluminum nitride (TiAlN) coating for high wear resistance and longer life.
• Eight steps covering diameters 6, 8, 10, 12, 16, 20, 25, and 30.5 mm—perfect for PG 7, PG 9, PG 11, PG 13.5, PG 16, and PG 21 cable glands.
• Self-centering split point eliminates the need for a pilot drill and prevents walking.
• 3-flat shank (10 mm diameter) ensures a secure, non-slip grip in the drill chuck.
• Right-hand cutting direction with a 118° point angle for efficient drilling in sheet metal, non-ferrous metals, and plastics up to 4 mm thick.

Specifications

• Tool type: Step drill bit
• Material: High-speed steel (HSS)
• Coating: Titanium aluminum nitride (TiAlN)
• Drilling diameter range: 6 - 30.5 mm
• Number of steps: 8
• Suitable PG cable gland sizes: PG 7, PG 9, PG 11, PG 13.5, PG 16, PG 21
• Maximum material thickness: 4 mm
• Shank type: 3-flat shank
• Shank diameter: 10 mm
• Overall length: 100 mm
• Point angle: 118°
• Cutting direction: Right-hand cutting
• Application materials: Sheet metal, non-ferrous metals, plastics

Tips

Use a low to medium speed and light, steady pressure. Apply cutting oil when drilling steel to prolong bit life and improve hole quality. The step markings are engraved for quick reference, so you can stop at the exact diameter you need.