Timken LM78310A Tapered Roller Bearing Cup

Product Description

The TIMKEN LM78310A is a tapered roller bearing cup, also known as the outer race, designed to seat the mating cone assembly in tapered roller bearing applications. This component manages both radial and axial loads within a compact envelope, making it suited for high-speed, heavy-load service conditions. The cup is precision-engineered to TIMKEN's dimensional standards, ensuring consistent contact geometry with the cone for maximized bearing life. Licensed HVAC and mechanical technicians, drivetrain specialists, and industrial maintenance professionals install this part as part of a complete bearing service.

The LM78310A cup is used in front axle pinion positions and related drivetrain bearing locations. Application data indicates fitment in RW-RWD MAS applications from 1984 to 1993, VKS Car applications from 1971 to 1974 at the front axle pinion position, and AUD Car applications from 1991. This cup is typically installed as part of a complete bearing service, replacing both the cup and cone simultaneously to restore proper load distribution and bearing geometry.

Key Features

• Outer race (cup) component of a tapered roller bearing assembly engineered for combined radial and axial load capacity
• Precision geometry maintains consistent contact angle with the mating cone for extended service life
• Compact form factor allows installation in space-constrained drivetrain and axle housings
• Designed for replacement in pairs with the corresponding cone for maximum reliability
• Single-piece unit packaged individually for direct OEM-style replacement

Compatibility

Designed for front axle pinion bearing service in RW-RWD MAS applications (1984-1993), VKS Car applications (1971-1974), and AUD Car applications (1991). Always verify the mating cone part number before ordering to confirm the complete bearing set.

Installation Notes

Installation should be performed by a qualified drivetrain or mechanical technician. Always replace the cup and cone together as a matched set to prevent premature wear from mismatched contact surfaces. Press the cup squarely into the housing bore using an appropriate bearing driver or arbor press to avoid cocking or scoring the raceway. Degrease and inspect the housing bore for damage before pressing in the new cup.