The 3115211900 Guide Bushing is a vital front-end guiding and wear-resistant component installed on the percussion cylinder of Epiroc COP1238 & COP1838 series hydraulic drifters, widely matched with Boomer 281 and Boomer 282 underground tunneling jumbos. It precisely restricts the radial swing of drill shank and impact piston, bears continuous high-frequency axial percussion load, and works with matching sealing components to block rock dust and prevent hydraulic oil leakage inside the drifter.

Manufactured strictly in accordance with Epiroc OEM drawing standards, this solid bronze guide realizes direct plug-and-play replacement of original factory spare parts. In harsh underground mine and tunnel construction environments filled with abrasive rock dust, mud and heavy impact vibration, it maintains stable concentric running of the shank assembly, reduces eccentric wear of core drifter components, and effectively cuts unexpected breakdown downtime of your Epiroc rock drill and tunneling jumbo.

• OEM Precision Machining for Perfect Interchange
• High-Density Tin Bronze Alloy for Extreme Mining Durability
• Dual Functions of Guidance & Expensive Parts Protection
• Cost-effective & Easy Maintenance

• Underground metal & coal mine: Blasthole and stope pre-split drilling equipped on Epiroc Boomer 281/282 jumbo with COP1238/COP1838 drifter.
• Highway, railway and hydropower tunnel engineering: Anchor bolt, drainage hole and support hole drilling for subway, mountain tunnel and underground gallery projects.
• Open-pit quarry and mineral mine: Production blast hole drilling for stone quarrying and open-pit rock excavation.
• Equipment overhaul & repair: Standard OEM replacement spare for full maintenance of used COP1238, COP1838 drifter and Boomer 281, Boomer 282 drill rig.