CAT 2J-2161 53.975mm Bore Diameter Needle Roller Bearing

CAT 2J-2161 is a Caterpillar genuine single-row tapered roller bearing (including inner ring/outer ring/rollers/cage, no seal, heavy-duty type), suitable for Cat 140M/160M grader steering drive axle differential and 938G loader transmission output shaft. It is designed to withstand radial and unidirectional axial combined loads and is suitable for low-to-medium speed heavy-duty applications. The following are the professional parameters and application guidelines:

Core Technical Parameters (Professional Version)

Item Details
Basic Attributes
Model: 2J-2161, Type: Single-row tapered roller bearing (no seal, no lubrication groove, standard contact angle 12°), Suitable for Cat 140M/160M grader steering drive axle differential and 938G loader transmission output shaft, Material: 52100 high-carbon chromium bearing steel (outer ring HRC 60-64, inner ring HRC 58-62, rollers HRC…) (62-66) Outer diameter φ140 mm, inner diameter φ80 mm, total width 35 mm, single weight approximately 2.1 kg, rated radial load ≥220 kN, rated axial load ≥85 kN, operating temperature -40℃ to +120℃, limiting speed 3200 r/min (grease lubrication)

Key Dimensions: Outer ring outer diameter tolerance 0/-0.020 mm, inner ring inner diameter tolerance +0.012/-0.008 mm, total width tolerance ±0.12 mm, roller diameter φ12 mm, length 28 mm, contact angle 12°, inner ring large end diameter φ105 mm, outer ring small end inner diameter φ92 mm, edge chamfer 0.5×45°, compatible shaft diameter φ80 mm (tolerance f6), mounting hole diameter φ140 mm (tolerance H7)

Material and Process: Material 52100 High-carbon chromium bearing steel (tensile strength ≥2000 MPa, impact toughness ≥120 J/cm²), vacuum quenched + low-temperature tempered, roller surface ultra-fine ground (Ra≤0.1 μm), cage made of stamped low-carbon steel (with wear-resistant coating), outer ring raceway without oil grooves/holes, compatible with Cat 2V lithium-based grease (filling 1/3-1/2 of the bearing internal space).

Compatible models: Cat 140M/160M grader (serial number JDH1200-UP) steering drive axle differential, 938G loader (serial number KAT800-UP) gearbox output shaft. Used to bear the radial + unidirectional axial load of the differential/gearbox, suppress shaft movement, ensure transmission accuracy, suitable for medium and low speed, frequent start-stop heavy-duty conditions.

Assembly fit: Inner ring with shaft interference fit (interference 0.010-0.018 mm), outer ring with housing transition fit (clearance). (0.005-0.010 mm), after installation, the bearing clearance should be controlled at 0.02-0.03 mm. Use a special press to cold press into place, avoiding impact damage to the raceway.

Installation and Maintenance Points: Before installation, clean the inner and outer rings, journal, and bearing bore in the housing. Check for cracks, pitting, and rust. For bearings without a seal, apply Cat 2V lithium-based grease to the rollers and raceway beforehand.

During assembly, first position the inner ring + roller assembly, then install the outer ring. Pre-tighten the end cap bolts (torque 150-180 N・m). After cold pressing, check that the bearing end face runout is ≤0.03 mm and the radial runout is ≤0.02 mm.

Maintenance Recommendations: Check the lubrication status every 1500 hours and replenish grease (every 600 hours). Replace immediately if wear (inner diameter increase >0.04 mm) or surface peeling occurs to prevent the shaft and bearing from seizing.