Catalog: Stalroc Industrial
Browse heavy-duty drilling components engineered for extreme environments.
Rear Cylinder
The rear cylinder, part 097 055 08, carries the return-line porting that feeds fluid back through a Sandvik rock drill's percussion circuit, and that porting is specific enough to the drill generation it was designed for that a rear cylinder from an earlier or later model rarely lines up correctly even when the outside dimensions look close. Fitting a mismatched reference here tends to show up as an internal leak path rather than as a part that visibly does not fit. Confirming the reference against the machine's own parts manual before ordering is the reliable way to avoid that mismatch, particularly on a rig that has had components mixed across a model change. Stalroc supplies this Sandvik part against its manufacturer number and exports worldwide to mining, tunnelling and quarrying operations.
Rotation Bushing
The rotation bushing, part 550 253 61, carries the torque of the rotation drive inside a Sandvik rock drill, and as it wears the drive train it supports starts to develop backlash before the wear is measurable any other way. That backlash is usually heard rather than seen: a knock or chatter on rotation reversal that gets dismissed as normal machine noise until it is compared against a drill running a fresh bushing. Catching it at the chatter stage, rather than waiting for it to affect penetration rate, is what keeps the repair to a bushing rather than the components it drives. Stalroc quotes this Sandvik reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Seal Kit
The seal kit, part 551 732 85, bundles the seals for one Sandvik rock drill assembly matched to that assembly's bore sizes and fluid duty, which matters because seals of the same apparent dimensions are not always cut from the same compound or durometer. Mixing seals sourced individually rather than as this kit risks a set that fits on the bench but wears unevenly once it is back under pressure. Buying the kit also means the less obvious items, the small back-up rings and wipers that are easy to leave off an individual order, arrive with the rest rather than being discovered missing mid-rebuild. Stalroc supplies this Sandvik reference against its part number and exports worldwide to drilling contractors.
Bearing
The bearing, part 552 250 91, runs under the combined vibration and shock loading a Sandvik rock drill puts through its rotating components, and a bearing failing under that duty usually gives a warning before it seizes: rising noise or a patch of heat felt through the housing during a routine check. Both are worth treating as an early warning rather than something to monitor, since a rock drill bearing under this kind of loading offers little margin between the first symptom and outright failure. Renewing on that early symptom, rather than waiting for it to worsen, is what keeps the repair to the bearing itself rather than the shaft and housing it runs in. Stalroc quotes this Sandvik reference by part number and exports worldwide to mining, tunnelling and quarrying operations.
Repair Kit
The repair kit, part BG005 501 96, groups the seals and wear parts needed for one full service of its assembly, matched to each other in compound and tolerance rather than assembled from parts sourced against separate references. Fitting the kit as a set avoids the mismatch that comes from replacing only the components that look worn while leaving others at a different point in their service life. A partial rebuild from mixed sources tends to fail again sooner than a full kit replacement, because the components that were left in place age at a different rate than the new ones around them. Stalroc quotes this Sandvik reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Bushing
The bushing, part 550 358 24, is fitted with an interference press rather than a running clearance, so it is the fitting process itself, not just the part, that determines how well it performs once installed. A bushing pressed in without the correct tooling can distort slightly during fitment, leaving a bore that reads within tolerance on one axis but not on another. Because that kind of fitment distortion does not show up on a simple diameter check, using the specified pressing tool and sequence matters as much as sourcing the correct bushing itself. Stalroc quotes this Sandvik reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Assembly Kit
The assembly kit, part 550 065 21, bundles the seals, bushings and retaining rings needed for one stage of a Sandvik rock drill rebuild into a single reference, so a workshop does not have to cross-check a parts book line by line to find what one strip-down actually consumes. Ordering the loose items individually is where kits like this usually get missed, and it is also where a rebuild stalls waiting on the one small ring nobody thought to order. Because the components in the kit are matched to each other, fitting only part of it and reusing the rest defeats the purpose of buying it complete. Stalroc supplies this Sandvik reference against its part number and exports worldwide to drilling contractors.
Ring
The ring, part 3125 4974 00, seats against a machined shoulder inside an Atlas Copco assembly to retain or locate an adjacent component, carrying almost no load itself under normal operation. Because it does so little work in service, a deformed or undersized ring is easy to overlook during a quick inspection, yet it is exactly the kind of small tolerance error that shows up later as play somewhere else in the assembly. A ring reused from a previous rebuild, even one that looks undamaged, can have taken a permanent set from the removal process that leaves it no longer seating fully square. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and construction contractors.
Roller Bearing
The roller bearing, part 0509 0221 00, sits at a shaft support point in Atlas Copco equipment and is sized to a specific bore and shaft fit, so a bearing that spins in its housing or on its shaft loses its rated capacity even while it still turns freely by hand. That kind of fit failure is easy to miss on a bench check, since the bearing itself can look completely serviceable. Contamination ingress is usually what actually ends a roller bearing's life rather than pure fatigue, since even hard, clean rolling contact tolerates far more cycles than most operating environments allow, which is why seal condition around the bearing matters as much as the bearing itself. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and construction contractors.
Pulley Wheel
The pulley wheel, part 3222 3094 37, is the larger of the pulley pair in its drive arrangement, setting the reduction ratio for the belt drive it carries and taking a correspondingly higher belt tension load than a smaller pulley in the same system. A wheel with a worn groove on this side of the drive throws off tension across the whole belt run, not just at the point of contact. Because this pulley carries more of the drive's total load, bearing wear at its hub tends to progress faster than on the smaller pulley it pairs with, so the two are worth checking together rather than assuming even wear across the drive. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and construction contractors.
Pulley Wheel
The pulley wheel, part 3128 0785 34, is the smaller of the pulley pair in its drive arrangement, running at higher rotational speed than its larger counterpart for the same belt speed, which means its bearing sees more revolutions per hour of operation. That higher cycle count is why the small pulley in a drive pair often reaches its service limit before the large one does, even though both carry the same belt tension. A groove worn out of profile on this pulley lets the belt ride slightly off-center, and that small misalignment shows up as accelerated wear on the belt edge long before the pulley itself looks obviously worn. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and construction contractors.
Profile
The profile, part 3128 0893 00, is a formed structural section that provides a mounting edge or guide track within an Atlas Copco assembly, and its exact cross-section is what other components register against. Even minor deformation along its length changes how anything sliding or mounted along it sits, in ways that are easier to feel as roughness in operation than to see by eye. Because the profile is a passive structural piece rather than a wear part in normal operation, damage to it usually comes from an impact or overload event elsewhere, which makes it worth checking whenever a component running against it has failed unexpectedly. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and construction contractors.