Acker - Roller Rock Bit

Conventional three cone design roller rock bits are widely used in soft to medium hard formations. This versatile bit is used in overburden and has been quite successful in drilling rock. However, it does require a considerable amount of down pressure to successfully cut rock. Roller rock bits are used with drilling muds or plain water. (Bits are available on special order for use with air os o flushing/cooling medium.) The bit is usually backed up by a heavy steel drill collar to provide the additional weight needed.