C.A.T Engine Main Bearing 117 mm OD 211-0587 2110587 Crankshaft Part Unit

117 mm Large Journal Steel-Backed Rigidity & Heavy Duty Load Distribution: Engineered specifically for heavy-duty 117 mm main journals, featuring a thick steel-backed architecture with exceptional structural rigidity. The enlarged surface area evenly distributes multi-ton cylinder firing loads across the engine block main saddles, eliminating saddle deflection under low-RPM high-torque demands. 

Full/Half Circumferential Oil Groove & Cross-Drilled Passages: Incorporates precision-machined circumferential oil grooves and cross-drilled metering ports. Maintains a continuous 360° dynamic oil wedge around the main journal while reliably feeding high-pressure oil downstream to adjacent connecting rod journals, preventing lubrication starvation and premature bearing scuffing. 

Advanced Lead-Tin-Copper Overlay & Embeddability for Journal Protection: Coated with a heavy-duty lead-tin-copper electroplated overlay designed for anti-scuffing protection. Offers superior foreign particle embeddability during cold start-ups or oil contamination events, safeguarding expensive 117 mm hardened crankshaft journals from micro-scoring.