CAT 0A-2250 BEARING-NEED

CAT 0A-2250 is a Caterpillar original stamped outer ring needle roller bearing (NEEDLE ROLLER BEARING), suitable for high-speed, medium-load applications with limited radial space, such as engines and transmissions. The following is precise information (without additional description):

Core Parameters and Information

Item Details
Part Model: CAT 0A-2250 (0A2250) Stamped Outer Ring Needle Roller Bearing (No Inner Ring, with Cage)

Part Type: Radial needle roller bearing, stamped outer ring, with plastic cage, adaptable to shaft diameter as inner ring, used in radially loaded, space-constrained transmission components, capable of withstanding radial static load ≤28kN, dynamic load ≤16kN

Material: Outer ring: ST12 low carbon steel, galvanized and passivated; Needle rollers: GCr15 bearing steel, hardness HRC61-65; Cage: PA66+GF25 nylon, oil and temperature resistant

Key Dimensions: Inner Diameter 25.40mm (1.000in), outer diameter 34.93mm (1.375in), width 19.05mm (0.750in), needle roller diameter 2.38mm, number of needle rollers 12, cage inner diameter 25.40mm, outer ring thickness 1.27mm

Structural Features: No inner ring, stamped outer ring; single row of needle rollers with cage; no flanges at both ends of the outer ring; the inner ring raceway is directly used for the matching shaft diameter; radial clearance after installation 0.01-0.03mm

Compatible Structure: Matching shaft diameter 25.40mm (tolerance h5), shaft surface roughness Ra≤0.4μm; mounting hole diameter 34.93mm (tolerance H7), hole surface roughness Ra≤0.8μm

Applicable Working Conditions: Gearbox output shaft, engine balance shaft, hydraulic motor drive shaft; speed ≤8000rpm (oil lubrication); operating temperature -40℃ to… 120℃ Compatible Models and Assemblies

Loaders: CAT 938G, 950G (Second Shaft Needle Roller Bearing Assembly for Gearbox)

Excavators: CAT 312B, 315B (Swing Motor Driveshaft Needle Roller Bearing Assembly)

Engines: CAT 3066, 3076 (Balance Shaft Needle Roller Bearing Assembly)
Compatible Assemblies: 938G Gearbox Second Shaft Needle Roller Bearing Assembly, 312B Swing Motor Driveshaft Needle Roller Bearing Assembly
Installation and Fitting Points

Clean the shaft surface and mounting holes before installation. The shaft surface must be hardened (HRC≥58), free of scratches and burrs. The mounting holes must be bored to H7 tolerance.

Use a special pressure sleeve for press-fitting. Do not strike the outer ring. After press-fitting, the end face of the outer ring should be flush with the end face of the mounting hole, with an axial deviation ≤0.02mm.

After assembly, check for radial runout ≤0.03mm, no needle roller jamming, smooth rotation without abnormal noise.

Use a puller to remove the outer ring during disassembly. When replacing, check the shaft surface for wear. If the wear is greater than 0.02mm, repair or replace the shaft.