Twist drill bit Bosch HSS hex-shank 5.5 mm

Twist drill bit Bosch HSS hex-shank 5.5 mm is a high-strength metal drilling tool designed for precise holes. The 5.5 mm HSS body with 1/4-inch hex shank provides reliable retention in impact drivers and standard chucks. The bit is precision-ground from solid metal, with an oxide-coated flute and a 135° split-point tip manufactured to DIN 338, type N, with diameter tolerance h8 for consistent, centered drilling.

Advantages

The Bosch HSS twist drill bit combines an oxide-coated flute for reduced wear, a precision-ground body for accurate diameter control, and a pointed split-point tip for active cutting and improved centring. The 1/4-inch hex shank prevents slipping in impact drivers and quick-change chucks, while compliance with DIN 338 and h8 tolerance ensures repeatable hole quality.

Suitable for

Key specifications

How to use

Secure the 1/4-inch hex shank in the drill or impact driver chuck. Mark the drilling position and start at low speed to establish the centre using the split-point tip, then increase speed and apply steady pressure appropriate for the metal thickness. Use cutting fluid for improved life and chip evacuation when drilling harder metals. Retract periodically to clear chips on deeper holes.

Recommendations

For best results when drilling metal, use appropriate cutting lubricant, select moderate speed to avoid overheating, and replace the bit if wear or chipping affects hole accuracy. The hex shank is suitable for impact drivers and quick-change chucks but ensure the tool’s settings match the material and bit size.