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How to disassemble the head of a down-the-hole rock drill

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Rock Hog Rock Drilling Products Rock

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How to disassemble the head of a down-the-hole rock drill [PDF]

6 FAQs about [How to disassemble the head of a down-the-hole rock drill]

Can a hammer be used to drill a hole?

When drilling holes in water-bearing rock, never leave the ham-mer at the hole bottom with the air supply switched off. If drilling is to be suspended temporarily, always pull up the hammer by at least two pipe lengths. Clean around the driver chuck before changing the drill bit. Make sure the shank of the new drill bit is clean.

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.

How do you change a hammer drill bit?

If drilling is to be suspended temporarily, always pull up the hammer by at least two pipe lengths. Clean around the driver chuck before changing the drill bit. Make sure the shank of the new drill bit is clean. Keep the hammer clean and plug both ends when not in use. Change worn or damaged parts in good time.

How do you remove a hammer from a drill rig?

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. The chuck thread connection need to be loosened up either with breakout ta-ble on drill rig before the hammer is removed, or with a breakout bench.

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 much hold back should be increased in DTH drilling?

Hold back should be increased more and more as additional rods are added and as drilling progresses. DTH drilling is primarily percussive drilling using the energy imparted by the hammer piston to the rock through the bit. Any attempts to apply too much weight could damage the bit, hammer and drill string and impair the drilling rate.