SKF LM603012 Tapered Roller Bearing Cup Race 1.7812 in Bore

The SKF LM603012 is a tapered roller bearing cup (outer ring) designed for use in single-row tapered roller bearing assemblies. As the cup component, it pairs with a matching cone — most commonly the LM603049 — to form a complete bearing set. The LM603012 is part of the LM603000 series and is widely used across automotive, trailer, and powersports driveline applications including rear axle shafts and differentials.

Key Features:

• Bearing Type: Single-row tapered roller bearing cup (outer ring/race)
• Inner Diameter (Bore): 1.7812 in (45.242 mm)
• Outer Diameter: 3.0625 in (77.788 mm)
• Cup Width: 0.6562 in (16.667 mm)
• Total Bearing Width (with cone): 0.8437 in (21.430 mm)
• Material: Chrome steel for superior hardness and wear resistance
• Cage Type: Stamped steel
• Cross Reference: Timken SET36 / LM603049–LM603012 assembly

SKF tapered roller bearing cups feature an ultra-smooth surface finish for efficient, quiet operation. The conical raceway geometry allows the bearing to handle combined radial and axial loads simultaneously, making it well suited for axle and differential applications where both load types are present. The separable cup-and-cone design simplifies mounting and allows end play or preload to be precisely adjusted during assembly.

SKF manufactures this cup to meet or exceed OEM quality standards, ensuring a reliable, long-service-life replacement. For best results, always replace the cup and cone together and use components from the same manufacturer to ensure consistent internal profiles, material properties, and tolerances.