Drill bit Proline 72245, metal drill bit 22 mm diameter, length 450 mm, 1 pc

Proline 72245 is a single solid metal drill bit with a 22 mm cutting diameter and a 450 mm overall length. Designed for drilling metal, this bit is suitable for handheld and stationary drills and is intended for deep or through holes where a long reach and consistent bore quality are required. The tool is produced for industrial and professional applications and fits tasks in metalworking, fabrication, maintenance and repair.

Advantages

The solid construction provides improved rigidity and reduced vibration during drilling, helping to maintain straight holes over the full 450 mm length. A cutting diameter of 22 mm offers a balance between material removal rate and hole control for mid-range sizes. The double-twist design promotes efficient chip evacuation from the hole, reducing clogging during deep drilling. Optimised cutting geometry at the tip supports precise centring and more consistent entry into metal surfaces.

Suitable for

• Drilling through steel plates and structural metal components
• Fabrication and assembly tasks requiring long-reach holes
• Maintenance and repair work on machinery and equipment
• Handheld and bench drilling where depth and straightness are important

Key specifications

• Cutting diameter: 22 mm
• Total length: 450 mm
• Material application: metal
• Design: solid shank, double-twist flute geometry
• Tip: multi-flute optimised cutting geometry for improved centring
• Pack quantity: 1 piece

How to use

Secure the drill bit in a drill chuck rated for the bit diameter and ensure the drill is suitable for metalworking operations. Mark the drilling position and, if necessary, create a centre punch mark to aid initial centring. Start drilling at low to moderate speed with steady pressure to establish the hole, then adjust speed according to material hardness and chip evacuation. For deep or through holes, periodically withdraw the bit slightly to clear chips and allow cooling. Use cutting fluid or suitable coolant when drilling tougher metals to extend tool life and improve finish.

Usage recommendations

For best results, use appropriate cutting fluid, clamp the workpiece securely, and select a drill speed matched to the metal type—lower speeds for hardened steels and higher speeds for softer metals. Check the drill bit regularly for wear and replace when the tip geometry is compromised to maintain hole accuracy.