Description
Overview:
The Timco Step Drill Bit 4-30mm HSS is a cone-profile bit for drilling, enlarging, and de-burring holes in thin sheet materials. Made from high-speed steel (HSS), it offers a good balance of durability and sharp cutting performance for repetitive site and workshop tasks. The stepped design covers diameters from 4mm to 30mm (0.16 to 1.18 inches), so you can create several hole sizes without changing bits. It is suitable for use in cordless drill drivers, corded drills, and drill presses with variable speed control. Ideal for thin sheet metal up to 4mm (0.16 inches) such as mild steel, aluminium, brass, and copper, and it can also be used on plastics where a clean, round hole is needed. For best results, use a suitable cutting lubricant.
Key Features:
- Wide size range: 4-30mm (0.16-1.18 inches) in one bit for versatile hole sizing and fewer tool changes.
- Drills, enlarges, and de-burrs in a single operation to save time and produce neat finishes.
- HSS construction for reliable edge retention and long service life under proper use.
- Optimised for thin sheet up to 4mm (0.16 inches) to reduce grabbing and distortion of the workpiece.
- Stepped geometry helps control cutting pressure and reduces chatter for smoother, round holes.
- Ideal for enlarging existing holes accurately without tearing thin metal.
- Works with variable-speed corded/cordless drills and drill presses; effective at low to moderate RPM.
- Use with cutting oil or spray lubricant to improve hole quality and extend tool life.
- Compact, multi-size solution that reduces the need to carry multiple individual twist drills.
- Practical choice for on-site and workshop metalworking where quick, clean hole preparation is required.
Typical Applications:
Automotive bodywork and repairs, HVAC ducting and ventilation installs, electrical enclosures and control panels, conduit and grommet holes, roofing and cladding sheets, trailer and machinery guards, brackets, and general fabrication in light-gauge steel, aluminium, copper alloys, and suitable plastics. Ideal for starting new holes in thin sheet and for accurately enlarging pre-cut or punched holes with minimal burr.
Also known as:
Step bit, cone drill, unibit, multi-diameter drill, progressive hole cutter, sheet-metal step cutter, tapered step cutter, stepped cone bit.
Product Specifications
| L&S Part No. | 902 0747 |
|---|---|
| Manufacturer | Timco |
| OEM No. | SD430 |
| Unit of Sale | 1 |
| Machine Type | Handheld Construction Tools |
| Key Features | - Covers hole sizes from 4mm to 30mm - HSS construction for durability and sharpness - Suitable for thin sheets up to 4mm - Compatible with variable-speed drills - Drills, enlarges, and de-burrs in one step |
