Drill bit Proline 73308 — metal drill bit Ø8 mm, length 300 mm, 1 pc

Single Proline drill bit model 73308 for metal, diameter 8 mm and overall length 300 mm. This straight shank drill bit is designed to drill through metal workpieces where extended reach is required. Compatible with hand-held drills and drill presses, it is intended for general metalworking tasks and installations that need a longer drilling depth than standard bits provide.

Advantages

The Proline Ø8 mm x 300 mm metal drill bit combines a long overall length with a straight shank for stable mounting in standard chucks. Its geometry is optimised for metal cutting, providing consistent chip evacuation and reduced walking at the start of drilling. Supplied as a single piece, the bit is convenient for one-off operations or for carrying spares for on-site jobs.

Suitable for

• Drilling through steel sheet, mild steel and structural metal parts
• Accessing deep or recessed holes where standard-length bits cannot reach
• Installation work that requires long-reach drilling with hand drills or bench drills
• Metalworking tasks on construction sites, workshops and maintenance jobs

Key specifications

• Material application: metal
• Diameter: 8 mm
• Overall length: 300 mm
• Shank type: straight shank for standard chucks
• Flute type: rolled flutes for improved chip removal

How to use

Secure the drill bit in the drill chuck and tighten firmly before starting. Mark the drilling position, use a centre punch if necessary to prevent slipping, and set the drill to a speed appropriate for the metal being worked. Apply steady pressure and allow the bit to remove chips without forcing; periodically withdraw the bit to clear chips when drilling deep holes. Use cutting fluid or lubricant on harder metals to extend the bit life and improve cutting performance.

Usage recommendations

For best results, start with a pilot hole when drilling large diameter or hard metal parts. Maintain moderate drill speed and consistent feed pressure; employ cutting fluid for steel and harder alloys. Inspect the bit for wear before use and replace when cutting performance degrades.