Roller main bearing designed to support crankshaft rotation within the engine block under high load conditions.

Features

• Supports crankshaft alignment under combustion load
• Reduces friction by converting sliding motion into rolling motion
• Designed for high RPM marine engine operation
• Suitable for rebuild and overhaul applications

Construction

• Commonly manufactured from hardened chrome steel such as 52100 for durability
• Rollers and races are heat-treated to resist fatigue and wear
• Designed for continuous high-speed operation

Notes

Inspect crankshaft journals, bearing seats, and lubrication conditions during installation.