Kierrep poranterä Bosch HSS 3,3 mm

Twist drill bit Bosch HSS 3.3 mm is a high-strength HSS drill designed for precise metal drilling and universal use with impact drivers. The 3.3 mm hex-shank bit is precision-ground from solid high-speed steel with an oxide-coated flute to reduce wear. It is manufactured to DIN 338 as Type N with a 135° split-point tip and diameter tolerance h8, supplied as a single piece in blister packaging.

Advantages

The HSS construction and precision grinding ensure long tool life and accurate holes. The oxide-coated flute improves chip evacuation and reduces friction and wear during drilling. The 135° pointed split-point tip provides active cutting and reliable centring, minimising walking at the start of the hole. The 1/4-inch hex shank allows quick, secure fitting in impact drivers and many chucks.

Suitable for

Key specifications

How to use

Mark and centre the drilling point, secure the workpiece, and clamp the 1/4-inch hex shank in the driver or chuck. Start at low speed to ensure correct positioning and then increase speed appropriate to the material. Apply steady feed pressure without forcing; clear chips periodically for deeper holes. For harder materials, use cutting lubricant to extend tool life.

Recommendations

For best results, use the Bosch HSS 3.3 mm drill bit with compatible impact drivers or drills rated for metalworking. Match drilling speed and feed to the metal type and consider light cutting fluid when drilling hardened steels. Store the bit dry and clean to preserve the oxide coating and maintain precision.