Drill Bit MODECO HSS cylindrical 4 mm set of 10 (MN-60-240)

MODECO HSS cylindrical drill bits, 4 mm diameter, set of 10 are high-speed steel tools intended for general-purpose metalworking and workshop drilling. The cylindrical shank design ensures secure seating in standard chucks and compatibility with handheld drills, drill presses and bench machines. These HSS bits are optimized for drilling through mild steel, non-ferrous metals and common construction materials where conventional high-speed steel performance is appropriate.

Advantages

The set contains ten identical 4 mm HSS bits that offer consistent hole quality and repeatability across multiple operations. High-speed steel construction provides a balance of hardness and toughness for cutting metal while maintaining edge retention under typical workshop speeds. The cylindrical shank allows straightforward mounting in keyed or keyless chucks and reduces slippage during drilling. Uniform dimensions across the set simplify tool organization and replacement.

Suitable for

• Drilling holes in mild steel and cast iron
• Drilling aluminum, brass and other non-ferrous metals
• General workshop and maintenance tasks
• Portable drilling with hand drills and bench drilling with drill presses

Key specifications

• Material: High-speed steel (HSS)
• Shank type: Cylindrical
• Drill diameter: 4 mm
• Quantity in set: 10 pieces
• Intended use: Metalworking and general-purpose drilling

How to use

Secure the selected 4 mm HSS bit in the drill chuck, ensuring it is straight and held firmly. Set the drill speed appropriate for the workpiece material—lower speeds for harder steels and higher speeds for softer metals such as aluminum. Use cutting fluid or coolant when drilling steel to reduce heat and extend tool life. Apply steady, moderate feed pressure; avoid excessive force that can cause bit breakage. After drilling, clear chips from the hole and inspect the bit for wear before subsequent use.

Usage recommendations

To maximize tool life and hole quality, pre-drill with a smaller pilot where precise alignment is required, use appropriate cutting fluid for steel, and select drill speeds matched to material hardness. Replace bits from the set when chipping or excessive wear appears to maintain consistent results.