Drop-Centre Bit.

Following in the path of the successful type 68 drill bit, Atlas Copco Rock Tools is introducing yet another eye-opening bit design. The new drop-centre bit is equipped with the new Atlas Copco head design and a retrac skirt, especially suited to provide improved service life, hole straightness and increased drilling speed in hard and abrasive rock.

The new head design, which started with the type 68 bit, is characterised by a greatly increased gauge angle behind the bit front. This design greatly reduces the diameter of steel that needs to be removed when drilling in r