Catalog: Stalroc Industrial
Browse heavy-duty drilling components engineered for extreme environments.
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.
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.
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.
Jaw
The jaw, part 052 317 48, is the primary wear surface that crushes material against its opposing plate in a Sandvik jaw crusher, and its profile is engineered to keep biting into the feed as it wears rather than going smooth and letting material slip through uncrushed. A jaw run past its usable thickness loses that bite well before it looks obviously worn out. Jaws are matched in pairs, and running one badly worn jaw against a fresher opposing plate skews the crushing angle and concentrates wear unevenly on both. Feed material hardness and gradation drive the wear rate more than running hours do, so operations track remaining profile rather than a fixed calendar. Stalroc quotes this Sandvik reference by part number and exports worldwide to mining, quarrying, and crushing contractors.
Jaw
The jaw, part 052 318 78, is the moving counterpart to a Sandvik jaw crusher's fixed plate, swinging through its crushing stroke on every cycle rather than sitting static against the feed. That motion means it sees impact loading in addition to the abrasive wear a fixed jaw absorbs, so its wear pattern typically develops faster and less evenly across the face. Because the two jaws in a crusher are matched, replacing only the moving jaw while the fixed plate is well past its own service life still leaves the crushing angle out of the geometry the chamber was set up for. Stalroc quotes this Sandvik reference by part number and exports worldwide to mining, quarrying, and crushing contractors.
Gear Assembly
The gear assembly, part 090 475 68, transmits drive through a matched set of gears whose tooth profiles are cut and hardened to run together, which is why it is supplied as an assembly rather than as individual gears. Mixing a new gear with a worn mating gear concentrates load on a shrinking contact area and accelerates the wear of both. Gear wear is often audible before it is visible, showing up as a change in running noise or backlash long before a tooth shows obvious damage, and lubrication quality has an outsized effect on how long the assembly lasts. Stalroc quotes this Sandvik reference by part number and exports worldwide to mining, quarrying, and drilling contractors.