ARM

The 857 325 19 ARM (85732519, 857-325-19, ARM 85732519) is a mining-grade structural ARM engineered for Sandvik drilling rigs, ROC series machinery, and underground jumbos. The 857 325 19 ARM supports mechanical linkages, hydraulic drives, and feed assemblies exposed to extreme vibration, drilling shock, and heavy-load operating conditions.

This 857 325 19 ARM is manufactured from reinforced, high-strength steel with precision-machined interfaces to ensure stable mounting, accurate alignment, and long-term durability. Catalog identifiers 85732519 and 857-325-19 are widely referenced in OEM and aftermarket spare parts listings.

The 857 325 19 ARM provides critical structural support and alignment within drilling assemblies, linking moving components such as boom joints, feed mechanisms, stabilizers, and actuators. Proper ARM rigidity improves drilling accuracy, minimizes mechanical wear, and maintains correct geometry under harsh mining and tunneling loads.

Inspect the 857 325 19 ARM for cracking, deformation, weld fatigue, surface wear, or worn pivot interfaces. Replace immediately if any structural weakness is detected.

Also indicated as 85732519, 857-325-19, and ARM 85732519, this structural ARM is essential for maintaining stable mechanical geometry in heavy-duty drilling operations.