CAT 205-4137 Bearing – Cup(Debris Resistant)

CAT 205-4137 is a Caterpillar genuine tapered roller bearing outer ring (Cup, compatible with transmission/drive axle tapered roller bearing assemblies). It is primarily used in the Cat 242D/252D skid steer loaders and the 305.5E2 mini excavator’s transmission axle and drive axle differential tapered roller bearing. Together with the inner ring (Cone), rollers, and cage, it forms a complete tapered roller bearing, capable of withstanding radial and bidirectional axial loads. The following is professional structured information:

Core Technical Parameters (Professional Version)

Item Details
Basic Attributes
Model 205-4137, Type: Tapered roller bearing outer ring (Cup, no flange, compatible with single-row tapered roller bearings), compatible with Cat 242D/252D skid steer loader transmission axle and 305.5E2 excavator drive axle differential tapered roller bearing assembly, material: high carbon chromium bearing steel (GCr15SiMn, integrally hardened), inner diameter… φ65 mm, outer diameter φ110 mm, width 22 mm, single weight approximately 0.78 kg, rated radial load 45 kN, axial load 18 kN, operating temperature -40℃ to +120℃, suitable shaft speed ≤3000 rpm, suitable bearing housing bore tolerance H7

Key Dimensions: Inner diameter tolerance 0/-0.015 mm, outer diameter tolerance +0.020/-0.010 mm, width tolerance ±0.1 mm, raceway cone angle 12°30′, raceway surface roughness Ra≤0.4 μm, chamfer at both ends 1.5×45°, coaxiality ≤0.03 mm, clearance with inner ring 0.020-0.030 mm, suitable bearing housing bore inner diameter ≥110 mm, depth ≥22 mm

Material and Process: Outer ring material GCr15SiMn (hardness HRC after quenching) 60-64), raceway surface hardened layer depth 2.0-2.5 mm, core hardness HRC 30-35, raceway precision ground, deburred at both ends, surface free of oxide scale/cracks, suitable for tapered rollers with a diameter of φ8 mm, 12 rollers.
Compatible models: Cat 242D/252D skid steer loaders (serial number JCB1000-UP) gearbox second shaft tapered roller bearings; 305.5E2 excavators (serial number JZH1000-UP) drive axle differential tapered roller bearings. Used in conjunction with the inner ring (e.g., 1B-6577), rollers, and cage, for supporting the gearbox input/output shafts and drive axle differential shafts, bearing radial + axial combined loads.
Assembly fit: Interference fit with bearing housing bore (interference 0.010-0.015 mm), axial clearance after fitting with the inner ring (Cone). 0.025-0.035 mm, rear end face runout ≤0.05 mm, radial runout ≤0.1 mm, uniform raceway contact marks, no localized stress concentration.

Installation and Maintenance Points:

Before installation, clean the bearing housing bore and check the outer ring raceway for pitting/scratching. Use an outer ring press-fit fixture to smoothly press it in, strictly avoiding striking the outer ring end face to prevent raceway damage.

When assembling with the inner ring (Cone), adjust the axial clearance to 0.025-0.035 mm. After installation, add Cat-specific extreme pressure grease (NLGI grade 2), replenishing every 800 hours.

Maintenance Recommendations: Replace immediately if outer ring raceway wear >0.15 mm or surface cracks appear. Avoid heavy load impacts that could cause raceway spalling. Regularly check the bearing housing bore seal to prevent impurities from entering and accelerating wear.