CAT 417-5746 BEARING

CAT 417-5746 is a Caterpillar genuine single-row tapered roller bearing (including inner ring, outer ring, rollers, and stamped steel cage; no seal/dust cover). It is suitable for drive axles, gearboxes, or differentials of mini excavators and loaders, and can withstand both radial and bidirectional axial loads. It is suitable for medium-to-low speed, heavy-duty applications. The following are the key information.

Core Technical Parameters

Item Details
Part Model: CAT 417-5746 (Single Row Tapered Roller Bearing, Stamped Steel Cage, No Seal)

Material: Inner/outer ring and rollers are made of 52100 bearing steel, integrally hardened (HRC 60-64), hardened layer depth ≥ 1.5 mm; suitable for -40℃ to +120℃ operating conditions, compatible with oil/grease lubrication

Key Dimensions: Inner diameter 50 mm (1.9685 in), outer diameter 80 mm (3.1496 in), width 20 mm (0.7874 in), roller big end diameter 7.8 mm, number of rollers 16

Single Weight: Approx. 0.32 kg (0.7055 lbs)

Tolerances and Fits: Inner diameter tolerance m6 (+0.012/+0.002 mm), outer diameter tolerance G6 (+0.012/-0.005 mm) (mm), radial clearance C3, rotational accuracy P0
Load capacity: Radial rated dynamic load 45 kN, axial rated dynamic load 25 kN, radial rated static load 50 kN, axial rated static load 30 kN, limiting speed 6000 rpm (oil lubrication) / 4200 rpm (grease lubrication)
Structure and core functions:
Composite load-bearing: Tapered roller line contact design, suitable for drive axle main reducers, gearbox output shafts, and other parts that need to bear both radial and bidirectional axial loads, combining positioning and load-bearing capabilities.

Rigid positioning: Separate inner and outer ring structure, allowing precise adjustment of clearance during installation, reducing axial movement and vibration of the shaft system, and ensuring transmission accuracy.

Easy assembly: Stamped steel cage with evenly distributed rollers, allowing separate installation of the inner ring and shaft, and the outer ring and bearing housing, suitable for batch maintenance scenarios, improving assembly efficiency.

Fatigue resistance and wear resistance: 52100 bearing steel + integral quenching process, possessing excellent resistance to pitting corrosion and deformation, suitable for frequent start-stop and impact conditions in engineering machinery. Compatible Models and Application Scenarios

Compatible Equipment: CAT 305E2/306E2 mini excavators, 903C/904C mini loaders, 416F2 backhoe loaders, C3.3B engine drive axle.

Core Applications: Used for drive axle differentials, gearbox intermediate shaft supports, steering knuckle pivot bearings, and the front end of hydraulic motor reduction mechanisms. Suitable for low to medium speeds (≤3000 rpm) and radial + axial combined load conditions.

Installation and Maintenance Points

Installation: Clean the journals and bearing housing bores, ensuring they are free of burrs and oil. The inner ring should be press-fitted to the shaft (0.015-0.025 mm). Heat to 80-100℃ for hot fitting. Do not directly strike the roller end faces or cage.

The outer ring and bearing housing have a clearance fit (0.010-0.020 mm). After press-fitting, the coaxiality should be ≤ 0.05 mm. Adjust the preload according to the original manufacturer’s specifications (axial clearance 0.05-0.10 mm).

Maintenance
Lubrication: Use CAT DEO-ULS diesel engine oil for oil lubrication and NLGI Grade 2 lithium-based grease for grease lubrication. Add grease/change oil every 500-800 hours, with the oil level reaching the center of the bearing.

Inspection: Regularly monitor vibration and temperature. Stop the machine and inspect if the vibration speed exceeds 4.5 mm/s or the temperature exceeds 85℃. Replace the bearing immediately and inspect the journal/seat bore for wear if the clearance exceeds 0.20 mm.