How to install the impact piston of an internal combustion rock drill

What happens when a drill bit hits a rock?

Under the action of impact force, the drill bit (usually in a pointed wedge shape) will crush the rock and chisel it into a certain depth, forming a dent on the rock. When the piston retracts, the drill bit will rotate at a certain angle. Then, the piston moves forward again, impacting the drill tail and forming another new dent.

What happens if a drill rig is not set-up correctly?

The rig must be set-up correctly in order to give stability and safety. If this is not done, the effects of feed force and rotation torque can cause the rig to move or even to over-turn. This could result in serious or fatal injury as well as damage to the drill rig and equipment.

How do you replace a piston on a cop M6?

Weight of piston is 17,4 kg. 9) Complete disassembled COP M6. Inspect the piston for wear or cracks, replace if cracks are found. Lubricate the piston inside and outside and casing inter-nally with Rock tool oil. Install piston from the backhead side of casing. Place the lock ring in place by using a steel bar and hammer.

What should I do if a drill hammer breaks?

Keep the threads and the insides of the pipes clean. Always cover the “open” thread end of the drill pipe during pipe- jointing operations. The ingress of dirt into the drill string will cause blockages and/or seizure in the hammer, which can result in breakdown.

How do I remove the backhead of a drill chuck?

Tighten the driver chuck with the aid of the bit wrench. Remove backhead. Backhead thread connection need to be loosened up with a breakout bench. Lift out the backhead, weight of the backhead is around 7,4 kg (16.3 lbs) Remove driver chuck, drill bit and bit retaining ring.

Should a drill pipe be covered before coupling?

Use thread covers wherever practicable. Always keep the open thread end of the drill pipe covered during jointing, and remove the cover just before the pipe is coupled up. Before coupling up, check that the drill pipe is clean around the threads and on the inside. If in doubt, blow clean the pipe.