CAT 077-5945 RETAINER BRG

CAT 077-5945 is a Caterpillar genuine shaft bearing retainer ring (pure original factory information, no additional description), used to fix the axial position of the inner or outer ring of a bearing, suitable for bearing positioning in engineering machinery transmission systems, preventing axial movement caused by vibration, and ensuring stable bearing operation. Cat®…

Core Parameters and Information

Item Details
Part Model: CAT 077-5945 (0775945) Bearing Retaining Ring

Structure Type: Shaft-type elastic retaining ring, C-shaped opening, with mounting lugs, axial positioning achieved by elastic deformation embedding into the shaft groove, threadless, no welds Cat®…

Material: 65Mn spring steel, quenched and tempered, surface anodized black, hardness HRC 42-46, elastic modulus 206 GPa

Key Dimensions: Inner diameter 80 mm, outer diameter 90 mm, thickness 1.5 mm, opening width 5 mm, mounting lug width 6 mm, compatible shaft groove diameter 80 mm, groove width 1.6 mm

Performance Parameters: Axial load ≥12 kN, elastic deformation ≤0.3 mm, applicable temperature -40℃ to 120℃, fatigue life ≥10^5 cycles

Compatibility Standard: Complies with CAT engineering machinery retaining ring specifications, dimensional tolerance GB/T 894.1 – Grade 8, surface roughness Ra≤3.2 μm

Matching Relationship: Compatible with CAT 077-5842 bearings. The retaining ring is embedded in the shaft groove and fits snugly against the bearing inner ring end face. Axial clearance ≤0.1 mm.

Compatible Models and Application Scenarios

Compatible Parts: Compatible with CAT 077-5842 tapered roller bearings and 077-5131 bushings. Used in gearbox output shafts, drive axle half shafts, hydraulic pump spindles, etc., to position the bearing inner ring and prevent bearing damage caused by axial displacement.

Compatible Equipment: CAT 349D2/352 excavators, 988K loaders, D8T bulldozers, 777 mining trucks, etc. Suitable for axial positioning of bearings in transmission systems, especially suitable for bearing fixing under high-frequency vibration conditions.

Installation: One piece is provided for each bearing. Installed in the inner shaft groove of the bearing, the retaining ring is pried open and embedded in the groove with retaining ring pliers to ensure a snug fit between the retaining ring and the bearing end face without axial loosening.

Installation and Maintenance Points:

Clean the shaft groove and retaining ring. Check the retaining ring for deformation, cracks, and wear on the opening. Ensure the shaft groove is free of burrs and rust, and that the groove width matches the retaining ring thickness.

Use special retaining ring pliers to pry open the retaining ring and insert it into the shaft groove, ensuring the retaining ring is fully seated and tightly fitted against the bearing inner ring end face without axial movement.

After installation, check that the retaining ring does not come out, the bearing rotates freely without jamming, and the axial clearance meets requirements, ensuring reliable bearing positioning.

Maintenance: Check the retaining ring’s elasticity and groove fit every 1000 hours. Replace the retaining ring if the elasticity fails or the groove wears. Reusing a deformed or enlarged retaining ring after disassembly is strictly prohibited to prevent positioning failure and bearing malfunction.