Drill bit 8 mm Proline 70821, metal, length 210 mm, 1 pc

Proline 70821 is a single 8 mm metal drill bit with a total length of 210 mm, designed for drilling metal with hand drills and drill presses. The drill bit is intended for through-holes and deeper drilling tasks where extended reach is required. Its construction targets workshop, construction and maintenance applications that need a long-reach metal cutting tool in a single-piece format.

Advantages

The drill bit features a long 210 mm overall length that enables access to recessed or hard-to-reach areas while preserving an 8 mm cutting diameter suitable for common fastening and assembly sizes. The geometry of the tip and helical flutes supports continuous chip evacuation during deep drilling, reducing the risk of clogging. Supplied as a single unit, the bit is compatible with standard drill chucks on hand drills and drill presses, providing straightforward installation and use.

Suitable for

• Drilling through metal sheets and plates
• Creating deep or recessed holes in steel and non-ferrous metals
• Workshop and maintenance tasks requiring a long-reach 8 mm hole
• Use with hand-held drills and drill press machines

Key specifications

• Material target: metal
• Cutting diameter: 8 mm
• Overall length: 210 mm
• Package quantity: 1 piece

How to use

Secure the drill bit in the drill chuck and tighten firmly before operation. Select an appropriate rotational speed and feed rate for the type and thickness of the metal being drilled; lower speeds are generally recommended for harder metals. Use steady, even pressure and allow the bit to cut without excessive side loading. For deep holes, periodically withdraw the bit to clear chips and reduce heat buildup. Apply cutting fluid or lubricant as needed to extend tool life and improve cutting performance.

Usage recommendations

For best results when drilling metal with the Proline 70821 8 mm bit, use a drill press where possible to maintain alignment and reduce lateral stress. Use cutting fluid for harder steels and remove chips frequently during deep drilling to prevent binding and overheating.