Drill bit HSS Bosch 4.2 mm x 75 mm (model 2609255096)

HSS drill bit Bosch 2609255096, 4.2 mm cutting diameter, total length 75 mm with a 43 mm working length. This solid, right-hand twist spiral drill is made of high-speed steel (HSS) and features a titanium nitride (TiN) coating and a 135° split-point tip with cross grind according to DIN 1412C. The bit is intended for fast, clean drilling with high surface quality and has an H8 diameter tolerance. Not suitable for aluminium. Coolant is recommended.

Advantages

The TiN coating reduces friction and increases surface hardness for longer tool life and faster drilling progress. The 135° split-point with cross grind enables secure penetration without pre-spotting and improves centring. The solid HSS construction provides robustness for a range of metalworking tasks while the right-hand spiral ensures standard clockwise cutting action.

Suitable for

Key specifications

How to use

Secure the drill in an appropriate chuck and set the machine to a speed suitable for the workpiece material. Position the bit on the desired point and start drilling with steady pressure. Use coolant where possible to extend tool life and reduce heat; withdraw the bit periodically to clear chips when drilling deeper holes. Do not use this bit for aluminium.

Recommendations

For best results, select feed and speed according to the metal type, apply coolant, and ensure the drill is sharp and correctly clamped. Avoid using this TiN-coated HSS bit on aluminium to prevent poor performance and potential clogging.