Step Drill Bit Set Rockforce RF-44706 6 pcs Ø4–32 mm

Step Drill Bit Set Rockforce RF-44706 6 pcs Ø4–32 mm is a compact set of stepped cutting tools designed for drilling and enlarging circular holes in thin materials. Each bit covers a sequence of diameters between 4 mm and 32 mm, reducing the need to change tools when producing progressive hole sizes. The set is intended for use in handheld drills and drill presses where controlled, de-burred holes in sheet metal, plastics and laminates are required.

Advantages

The step drill bits combine multiple cutting diameters on a single flute body, enabling fast transitions between hole sizes and fewer tool changes. Their geometry delivers efficient chip evacuation and reduced snagging on thin materials. The set’s size range from small pilot holes to larger openings covers common installation and maintenance requirements, and the bits are suitable for both portable and stationary drilling setups.

Suitable for

• Drilling and enlarging holes in sheet metal and thin metal panels
• Creating holes in plastic panels, PVC and acrylic sheets
• Working with laminates and composite panels
• Electrical installation, HVAC ductwork and mounting hardware
• Workshop prototypes, light fabrication and maintenance tasks

Key specifications

• Set composition: 6 step drill bits covering progressive diameters from 4 mm up to 32 mm
• Material suitability: designed for thin metals, plastics and laminates
• Mounting: suitable for use in handheld drills and drill presses with compatible chucks
• Cutting form: stepped single-piece flute design for sequential hole sizes
• Application range: from small pilot holes to larger through-holes without frequent tool changes

How to use

Select the bit that includes the required target diameter and secure it in the drill chuck. Start drilling at low speed to establish the initial hole, applying steady pressure and keeping the drill perpendicular to the workpiece. For metal workpieces, use cutting lubricant where appropriate to reduce heat and prolong bit life. Advance until the step corresponding to the desired diameter passes through the material; withdraw the bit and clear chips before continuing. For larger diameters, progressively step up as necessary rather than forcing the bit at excessive feed rate.

Usage recommendations

Use appropriate personal protective equipment, clamp the workpiece securely, and select drill speed according to material thickness. For cleaner edges in plastics and laminates, reduce speed and avoid excessive feed; for thin metal sheets, apply light cutting oil and moderate speed to extend tool life.