ACL Bearings 5M1633H-STD Race Series Main Bearing Set Standard Size

ACL Race Series main bearings are manufactured with tri-layer metal construction featuring a hardened steel backing designed to withstand high RPM conditions, high stress loads, and extreme temperatures. This standard size bearing set is engineered for tuning and engine upgrades where superior quality and higher bearing capacity than OEM bearings is required.

Key Features:

• Trimetal construction with three layers of hardened steel, copper and nickel for superior strength and durability
• Large chamfer design accommodates larger crankshaft fillets
• 3/4 groove provides optimum oil supply to rods and maximizes load carrying capacity
• Increased crush and tighter wall tolerance for improved seating
• Improved overlay with reduced thickness for increased fatigue strength
• Trimetal composition substantially lowers friction and reduces operating temperatures
• Bearing material: F780 alloy

Technical Specifications:

• Bearing Size: Standard (STD)
• Bearing Type: Upper and lower halves included
• Maximum shaft size: 52.964mm (2.085")
• Maximum tunnel size: 56.667mm (2.231")
• Vertical oil clearance: 0.036mm to 0.078mm (0.0014" to 0.0031")
• Maximum overall length: 20mm (0.787")

This Race Series bearing is specifically designed for engines that will operate at higher RPM than stock and see more demanding conditions than factory specifications. Complete set includes all bearings required for one engine. ACL Race Series performance engine bearings are recognized as a premier brand throughout the motorsports world.