Step Drill Bit MODECO MN-61-802 — cylindrical stepped set, steps: 7, 5, 10, 13, 16, 19, 31, 33, 29, 21, 23, 26, 35 mm

MODECO MN-61-802 is a cylindrical step drill bit designed to create a range of hole diameters with one tool. The stepped profile contains the specified diameters 7, 5, 10, 13, 16, 19, 31, 33, 29, 21, 23, 26 and 35 mm, enabling progressive enlargement of holes in thin metal sheets, plastics and similar materials. The bit is intended for use with handheld electric drills and drill presses where multiple hole sizes are required without frequent bit changes.

Advantages

The stepped geometry provides quick access to several diameters while maintaining concentricity and reducing the need to switch tools. A single cylindrical stepped bit simplifies workflow when working with sheet materials and thin-walled components. The design allows controlled cutting depth for each step, helping achieve clean edges and consistent hole size. Compatibility with standard drill chucks makes the bit suitable for common workshop and on-site drilling tasks.

Suitable for

• Enlarging or creating holes in thin metal sheets
• Drilling holes in plastics and composite panels
• On-site drilling with handheld electric drills
• Workshop use on drill presses for rapid size changes

Key specifications

• Stepped diameters: 7 mm, 5 mm, 10 mm, 13 mm, 16 mm, 19 mm, 31 mm, 33 mm, 29 mm, 21 mm, 23 mm, 26 mm, 35 mm
• Type: cylindrical stepped drill bit
• Intended materials: thin metal sheets, plastics, similar thin-walled materials
• Compatible mounting: standard drill chucks for handheld drills and drill presses

How to use

Secure the step drill bit in the drill chuck ensuring it is held firmly and concentric. Select an appropriate rotational speed for the material: lower speeds for harder metals and higher speeds for plastics. Start drilling with light to moderate pressure, allowing the bit to cut progressively through successive steps until the desired diameter is reached. For best results, use cutting fluid or lubricant when drilling metal to reduce heat and prolong tool life. Withdraw the bit periodically to clear chips and avoid overheating.

Usage recommendations

Prior to drilling, mark the centre of the hole and, for improved accuracy in thin sheets, consider a small pilot punch or pilot drill. Maintain steady feed pressure and appropriate speed for the material in use. When working with metals, apply suitable coolant and clear swarf frequently. Inspect the bit for wear before use and replace if cutting performance declines to maintain hole quality and safety.