CAT 2P-9858 19.05mm Inner Diameter Needle Roller Bearing

CAT 2P-9858 is a stamped outer ring needle roller bearing (no inner ring, inner raceway shaft diameter) used by Caterpillar for small transmission components. It has an inner diameter of 19.05 mm (3/4 in) and is suitable for gear shafts/connecting rod pins in Cat 302.7/303E CR excavators, 246D skid steer loaders, and other equipment. It is used for radial heavy-duty applications and positioning in confined spaces. The following is professional structured information.

Core Parameters (Professional Version)

Project Details
Basic Attributes Model 2P-9858, Stamped Outer Ring Needle Roller Bearing (No Inner Ring), Suitable Shaft Diameter φ19.05 mm (Tolerance h6: 0–-0.013 mm), Unit Weight 0.08 kg, Cold State Radial Clearance 0.04–0.08 mm, Quantity 1–2 Pieces per Unit, Used for Gearbox/Transfer Case Intermediate Shaft or Connecting Rod Pin

Key Dimensions Inner Diameter φ19.05 mm (Tolerance F7: +0.03–+0.05 mm), Outer Diameter φ28 mm (Tolerance 0–-0.03 mm), Width 19 mm (Tolerance ±0.1 mm), Needle Roller Diameter φ2.38 mm, Number of Needles 12, Outer Ring Thickness 1.2 mm, Chamfer at Both Ends 0.5 mm

Material and Process Outer Ring is SPCC Cold Rolled Steel Plate (Stamping + Quenching, Hardness…) 56–60 HRC); needle rollers are made of GCr15 bearing steel (quenched and tempered, hardness 61–65 HRC, diameter tolerance ±0.002 mm); cage is made of PA66 nylon + glass fiber (tensile strength ≥80 MPa), outer ring surface is galvanized and passivated (salt spray resistance ≥48 hours)

Performance Parameters: Rated radial load 42 kN, rated static load 68 kN, permissible linear velocity ≤8 m/s, operating temperature -40℃ to +120℃, coefficient of friction ≤0.003 (oil lubrication), compatible with ISO VG 68–150 gear oil, no seal (requires chamber lubrication)

Compatible Models: Cat 302.7/303E CR mini excavator (slewing gearbox planetary gear shaft), 246D/242D skid steer loader (gearbox output shaft), 416F2/420F2 excavator (pilot pump drive shaft), compatible bearing housing bore φ28 H7 (0–+0.021 mm)

Installation and Maintenance Points: Before installation, clean the journal (surface roughness Ra≤0.8 μm, free of scratches/burrs) and seat hole. Use a special sleeve to press in evenly with a pressing force ≤8 kN. Do not strike the outer ring. The journal requires heat treatment (HB 220–250), with a surface hardness ≥HRC 40 (hardened layer ≥1.5 mm).

Clearance Control: After installation, use a plug gauge to measure the clearance between the inner diameter and the shaft diameter, ensuring it is 0.04–0.08 mm. If the clearance exceeds the tolerance, repair the journal (grinding) or replace the bearing.

Lubrication Requirements: Apply extreme pressure lithium-based grease (NLGI grade 2) before installation. During operation, use forced oil lubrication (pressure ≥30 kPa). Check the oil quality/quantity every 800 hours to ensure adequate lubrication.

Troubleshooting: If abnormal noise or temperature rise occurs, first check for wear of the needle rollers (>0.02 mm, need to be replaced), deformation of the outer ring, or insufficient lubrication. If necessary, replace the bearing and clean the cavity debris.