Catalog: Stalroc Industrial
Browse heavy-duty drilling components engineered for extreme environments.
Shaft
The shaft, part 3128 2427 00, transmits rotational drive along its length and is machined to a tolerance that the bushings and seals riding against it depend on to hold their own clearances. Surface wear on a shaft is often smaller than the wear on the softer bushing around it, so a shaft can look serviceable by eye while still being the reason a freshly fitted bushing fails again quickly. Because bushing life is set by the shaft surface it runs against, checking shaft condition is part of any bushing replacement rather than a separate decision. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Diaphragm
The diaphragm, part 3115 2472 00, separates two pressure zones with a flexing membrane rather than a sliding seal, so its service life is governed by fatigue cycles rather than by the sliding wear that limits most other seals. A diaphragm that has developed a pinhole fatigue crack leaks only under pressure and can pass a static visual check while still failing under load. Because fatigue failure in a diaphragm is cycle-dependent rather than time-dependent, it is generally replaced on a cycle-based interval rather than left in service until a visible leak appears. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Rubber Element
The rubber element, part 3222 3322 66, damps vibration or absorbs shock between two rigid components, and its compound is formulated for the specific stiffness that assembly was designed around rather than for rubber hardness in general. An element that has hardened with age transmits more vibration through to the components on either side of it, which shows up as increased wear on those components before the element itself looks obviously degraded. Because a hardened rubber element still holds its shape and location, it is easy to overlook as the actual source of vibration-related wear appearing elsewhere in the assembly. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Rotation Chuck
The rotation chuck, part 3115 3260 01, grips the shank adapter and transmits both rotation and percussive impact into the drill string, combining two very different load types in the same contact surfaces. Because it has to transmit shock as well as torque, wear inside the chuck shows up first as a loss of grip under impact rather than as slipping under steady rotation, which makes it easy to miss during a routine check made only under rotation. A chuck that has lost its grip under impact loading lets the shank move slightly on every blow, and that repeated micro-movement is what accelerates wear on the shank adapter it holds. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Selenoid Valve Assembly
The solenoid valve assembly, part 2653 3362 10, converts an electrical control signal into a hydraulic switching action, and it is supplied as a complete assembly because the coil, spool, and body are matched to each other's response time. Fitting a generic coil onto an existing spool and body can restore basic switching function while still leaving the valve's response slower than the control system was calibrated to expect. That mismatch in response time is rarely obvious from a bench test and tends to show up only as sluggish or inconsistent control behaviour once the rig is back in service. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Gasket
The gasket, part 0653 9038 00, seals a joint between two machined faces, and its thickness is part of what sets the clamping gap and preload across the joint rather than being a purely passive seal. A gasket of the wrong thickness can seal successfully at first fitment and still change the joint's clamping behaviour enough to cause a leak once the assembly has run through a few thermal cycles. Because the thickness tolerance matters as much as the seal material itself, gaskets on precision-machined joints are specified by part number rather than substituted from generic gasket stock. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Guide Sleeve
The guide sleeve, part 3115 2742 00, keeps a moving shaft or piston centred along its stroke, taking the side load that would otherwise transfer directly onto the seals riding next to it. As the sleeve's bore wears oversize, it allows the shaft to move off-centre by a small margin that is enough to shorten seal life without yet affecting the sleeve's own basic function. Because seal wear downstream of a worn guide sleeve looks like ordinary seal fatigue, a seal that keeps failing early in the same position is worth checking against the sleeve it rides in rather than replaced again on its own. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Joystick Button
The joystick button, part 3222 3278 43, carries a specific function selection at the operator's fingertip, and its contact rating and travel are matched to the switching logic behind it rather than being an interchangeable generic pushbutton. A button that sticks or fails to make full contact reads to the control system as no input at all, which is often diagnosed as a fault further along the control chain before the button itself is checked. Because the button sits at the very start of that signal path, ruling it out early avoids tracing an intermittent control fault through the rest of the system first. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Piston Guide
The piston guide, part 3115 3271 00, keeps the percussion piston travelling on a true axis through its full stroke, which matters more in a drifter than in most other hydraulic cylinders because the piston is under impact rather than smooth reciprocating load. Once the guide develops clearance, the piston can strike slightly off-axis on each blow, and that off-axis impact is what accelerates wear on the cylinder bore around it. Because cylinder bore wear downstream of a worn guide is far more expensive to correct than the guide itself, piston guide clearance is one of the checks worth making before a drifter goes back into service after any internal work. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Hydraulic Motor
The hydraulic motor, part 3222 3111 56, converts hydraulic flow into the rotational drive that turns the rig's rotation unit, and its internal clearances are set to a specific efficiency curve rather than simply built to turn under pressure. Internal leakage across worn clearances lets the motor still rotate under light load while losing torque under the higher load drilling actually demands, which shows up as stalling under load rather than as an obvious fault when tested idle. Because that leakage is internal, a motor can pass a basic no-load spin test and still be the reason a rig loses rotation torque under real drilling conditions. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Drain Block
The drain block, part 3222 3097 78, collects case drain flow from a component and routes it back to tank at low pressure, a function that only becomes visible when it is not working correctly. A drain block with a partially blocked passage lets case pressure build slightly above design, which raises seal loading throughout the component it drains without ever showing as a fault at the block itself. Because a restricted drain block causes symptoms elsewhere rather than at its own location, unexplained seal failures on a component are worth tracing back to its drain path rather than assumed to be the seal's own fault. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and drilling contractors.
Drill Steel Support
The drill steel support, part 3222 3097 46, centres and steadies the drill string as it advances into the hole, preventing whip and lateral flex along a length of steel that would otherwise buckle under its own drilling loads. A support running worn jaws lets the string flex slightly more with every rotation, and that added flex is what accelerates thread wear and rod fatigue further down the string. Because the wear it prevents happens along the rods rather than at the support itself, a rig losing rod life faster than expected is worth checking at the drill steel support before the rods are blamed outright. Stalroc quotes this Atlas Copco reference by part number and exports worldwide to mining, quarrying, and drilling contractors.