Atlas Copco Spare Parts
Compatible rock drill components for Atlas Copco — 118 parts listed
Spacer
The spacer, part 3128 0610 00, maintains a fixed clearance between two components in an Atlas Copco assembly, and unlike a wear part it is not meant to lose material in service at all. Any measurable change in its dimension is usually a sign of incorrect loading elsewhere rather than routine wear. Reusing an old spacer during a repair, even one that shows no visible damage, risks a permanent set that leaves the reassembled joint slightly out of tolerance in ways that only show up later as premature wear on the parts either side of it. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and construction contractors.
Back Head
The back head, part 3115 2063 00, closes the rear of an Atlas Copco rock drill and carries the flushing and control connections, taking the full recoil of every impact the piston delivers. Its threaded joint to the drill body has to stay tight through that repeated shock loading, and once it works loose even slightly, flushing pressure starts leaking past the seal instead of reaching the bit. Wear at the thread or seal face is usually found during a scheduled strip-down rather than from an obvious symptom in the field, since a small leak here is easy to mistake for a problem elsewhere in the flushing circuit. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Accumulator
The accumulator, part 3115 3451 81, smooths out the pressure pulses generated by a rock drill's percussion cycle so the hydraulic circuit feeding it does not see the full shock of every blow. A charge that has bled down loses that damping effect gradually, so the drill keeps running while the circuit around it starts absorbing punishment it was never meant to see directly. Because the loss is gradual, a weak accumulator often gets diagnosed only after hoses or fittings elsewhere in the circuit start failing prematurely, rather than being caught on its own. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Arm
The arm, part 3222 3189 11, is a mechanical linkage member that transfers motion or load between two points in an Atlas Copco assembly, pivoting at both ends under repeated cyclic load. Wear concentrates at those pivot points long before the arm body itself shows any sign of fatigue, so play in the joint is usually the first indication of a problem. An arm that has developed play at its pivots lets the mechanism it drives move slightly out of its intended path on every cycle, which over time accelerates wear on whatever it is connected to. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and construction contractors.
Bushing
The bushing, part 3128 3141 67, is a sacrificial sleeve that carries rotating or sliding load so that the surrounding bore does not wear directly, and it is deliberately the softer of the two mating surfaces. Once its clearance opens up beyond tolerance, the load it was protecting the housing from starts reaching the housing itself. Because the bushing wears from the inside out, play can develop well before any wear is visible from outside the assembly, which is why clearance is usually checked by measurement rather than by eye during scheduled service. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and construction contractors.
Check Valve
The check valve, part 3128 2099 55, allows flow in one direction only and closes against reverse flow, and its sealing depends on a spring and seat that see thousands of cycles without ever fully wearing in the way a sliding part does. A check valve that no longer seats fully does not stop the circuit from working, it just lets pressure bleed back the wrong way between cycles. That kind of internal leak tends to show up as slower response or reduced holding pressure rather than an outright failure, which makes a worn check valve easy to overlook until the symptom is traced back to it directly. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and construction contractors.
Coupling
The coupling, part 3115 0277 00, joins two rotating or reciprocating sections of an Atlas Copco drill string so torque and impact energy pass through cleanly, and its threads absorb the same repeated shock loading as the components on either side of it. Thread wear here reduces the amount of energy actually transmitted through the joint, well before the coupling looks visibly damaged. A coupling running loose under impact wears rapidly once play develops, since each blow now includes an impact within the joint itself rather than a clean transfer of energy, so a coupling that has started to loosen deteriorates faster from that point on. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Cover
The cover, part 3115 2618 00, closes an opening in the Atlas Copco housing to keep contamination out and lubricant or fluid in, and its seal face has to stay flat and undamaged to do either. A cover that has been removed and refitted repeatedly during servicing is often the first place a slow leak or a contamination ingress problem traces back to. Because the cover itself rarely fails structurally, damage is usually cosmetic scoring on the seal face from a previous removal, which is easy to miss on a quick visual check but still enough to compromise the seal underneath. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and construction contractors.
Stop Ring
The stop ring, part 3115 1434 00, holds a bearing, bush, or piston square against its running position inside an Atlas Copco assembly and takes the axial thrust that would otherwise push that component out of alignment. It carries almost no radial load in normal operation, which is exactly why a cracked or deformed ring is easy to miss during a routine visual check. A stop ring that has begun to distort under repeated thrust loading lets the component behind it creep slightly out of position on every cycle, and that small shift is what usually shows up first as uneven wear on the part it was meant to hold in place. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Shank Bushing
The shank bushing, part 3115 2118 00, guides the drill shank as it transmits impact energy from the piston into the drill steel, absorbing the side loading that comes from any misalignment between the two. It is deliberately the softer of the two mating surfaces, so it wears in place of the shank, which is the far more expensive part to replace. A worn shank bushing lets the shank move off-axis slightly on every blow, and that small misalignment compounds quickly under percussion, accelerating wear on the shank itself once the bushing clearance has opened up. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Seal
The seal, part 3128 2166 00, keeps fluid or lubricant contained at a moving interface in an Atlas Copco assembly, and its lip has to maintain constant contact with a shaft or bore that is in continuous relative motion against it. A seal that has hardened with age can look intact on the bench and still leak the moment it is put back into service, since the lip no longer flexes to track surface irregularities. A leaking seal is rarely the end of the story, since contamination getting in through the same gap fluid is getting out of tends to damage whatever the seal was protecting well before the leak itself becomes obvious. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and construction contractors.
Pressure Gauge
The pressure gauge, part 3177 3032 00, reads system pressure directly on Atlas Copco equipment, and the decisions made about operating the machine depend on the accuracy of that reading. A gauge rarely fails by going obviously blank; it more often drifts quietly out of calibration while still looking entirely normal to the operator reading it. A gauge reading a false pressure is arguably more dangerous than one that has visibly failed, since a visible failure at least prompts attention. Mechanical shock from an unprotected mounting is a common and avoidable cause of premature gauge failure. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and construction contractors.