Drill bit PDCD93
Used for rotary drilling of holes with a diameter of 93 mm in monolithic rocks with the strength coefficient (F) from 7 to 15 on a scale of Professor Protodyakonov drill by rotary action.
The connection rod is threaded;heat treating the body, MI-40-45;hard alloy – ATP; on the body has side carbide inserts to improve the abrasion resistance.