Pilot drill bit Bosch Tungsten carbide 2608584777

The Bosch Tungsten carbide 2608584777 pilot drill bit is a precision accessory for hole saws with cutting capacities under 60 mm. It features a 1/4" hex shank and a 118° tip, with centred, diamond-ground multi-purpose carbide tips for accurate starting and stable guidance during drilling. The 120 mm overall length and tungsten carbide construction deliver wear resistance and long service life for demanding drilling tasks.

Advantages

The tungsten carbide tip provides high hardness and wear resistance for extended lifetime compared with standard HSS pilots. The 1/4" hex shank ensures secure bit retention in chucks and quick changes in hex-compatible holders. The centred, diamond-ground tip design improves pilot centring and reduces walking when starting holes, resulting in cleaner, more accurate cuts for hole saw applications.

Suitable for

Key specifications

How to use

Mount the pilot drill bit into a compatible hex chuck or quick-change holder ensuring it is securely seated. Fit the pilot into the hole saw and tighten the arbor according to the hole saw manufacturer's instructions. Start drilling at low speed to allow the centred tip to locate the cut, then increase speed as appropriate for the work material. Apply steady feed pressure and avoid excessive side load to prevent premature wear or breakage.

Recommendations

Use appropriate drilling speeds and lubricants for the material being cut (particularly for metals), and inspect the pilot tip regularly for wear. Replace the pilot when the tip shows visible wear or reduced centring accuracy to maintain hole quality and prolong the life of the hole saw.