Step drill bit Yato YT-44741 75 mm 1 pc

The Yato YT-44741 step drill bit 75 mm is a single-piece cutting tool designed for creating and enlarging round holes in sheet materials. With a stepped profile along its length, this drill bit permits multiple hole diameters to be produced with one tool, reducing the need to change bits during work. The 75 mm overall length provides sufficient reach for most panel and thin-plate applications while maintaining rigidity for accurate, clean cuts.

Advantages

This step drill bit offers gradual, progressive cutting action that produces smoothly finished holes without extensive deburring. Its single-piece construction ensures better concentricity and lower runout compared with multi-piece designs. The stepped geometry minimizes chatter and allows controlled chip evacuation for faster drilling through metal, plastic, and laminates. The compact 75 mm length balances accessibility and stiffness for repeatable results.

Suitable for

• Drilling and enlarging holes in thin sheet metal and aluminium panels
• Creating cable and conduit entry holes in electrical enclosures
• Working with plastic, fiberglass or composite panels
• Workshop and on-site maintenance tasks requiring multiple hole sizes

Key specifications

• Tool type: step drill bit for creating multiple hole diameters
• Length: 75 mm overall length suitable for sheet materials
• Construction: single-piece cutting geometry for improved concentricity
• Applicable materials: sheet steel, aluminium, non-ferrous metals, plastics, laminates
• Cutting action: stepped profile allowing progressive diameter increases

How to use

Mount the step drill bit in a suitable drill or drill press with a securely tightened chuck. Start drilling at low speed to establish the pilot contact point, then increase speed within the recommended range for the work material while applying steady feed pressure. Advance the bit until the required step diameter is reached, then withdraw to clear chips. For larger final hole diameters, progress through the intermediate steps rather than forcing the cut at a single step to maintain hole quality and extend tool life.

Usage recommendations

Use cutting fluid or lubricant when drilling metals to reduce heat buildup and prolong tool life. Secure thin workpieces with clamps or backing to prevent flexing and ensure concentric holes. Observe appropriate drill speeds for the material being worked and replace the bit once wear degrades hole quality.