Timken M86610 Tapered Roller Bearing Cup

Product Description

The TIMKEN M86610 is a tapered roller bearing cup, also called the outer race, designed to work in conjunction with a matching tapered roller bearing cone to support combined radial and axial loads. The cup seats in the housing bore and provides the hardened raceway surface the tapered rollers ride against. Sold individually as a single unit, the M86610 is engineered to deliver reliable load capacity in a compact envelope. Timken tapered roller bearings are a standard in driveline, axle, and powertrain applications where both thrust and radial forces must be managed simultaneously. Licensed technicians and drivetrain specialists install this component during bearing service on front axle and differential assemblies.

The M86610 cup is suited for front axle pinion and differential bearing applications in passenger vehicles and light trucks. Documented application fitment includes Audi passenger cars from 1978 to 1990, BMW 3 Series from 1988 to 1991, and Mitsubishi trucks from 1983 forward, as well as rear-wheel-drive vehicles from 1963 to 1982 in the front axle pinion position. When servicing any of these assemblies, both the cup and its matching cone should be replaced together to maintain proper geometry and maximize bearing service life.

Key Features

• Tapered roller bearing outer race (cup) engineered for combined radial and axial load capacity
• Hardened raceway surface for durability in high-load driveline environments
• Compact dimensional profile fits standard housing bores in documented axle applications
• Sold as a single unit; replace cone and cup together for best reliability
• Manufactured to Timken engineering standards for tapered roller bearing geometry

Compatibility

Documented fitment includes Audi passenger cars (1978-1990), BMW 3 Series cars (1988-1991), Mitsubishi trucks (1983 forward), and rear-wheel-drive passenger cars in the front axle pinion position (1963-1982). Always verify housing bore dimensions and the matching cone part number before installation.

Installation Notes

Installation of a tapered roller bearing cup is typically performed by a drivetrain or chassis technician. The axle assembly or differential housing must be completely disassembled and the component to be serviced must be depressurized and de-energized before work begins. A proper bearing driver or press should be used to seat the cup squarely in the housing bore; never drive a bearing cup with a hammer directly against the race surface. Replace the mating cone at the same time and verify preload settings per the vehicle service manual before returning the assembly to service.