CAT 361-1905 BEARING

CAT 361-1905 (3611905) is a Caterpillar original single-row deep groove ball bearing, suitable for high-speed, light-load rotating parts such as hydraulic pumps, gearboxes, and engine accessories. The following is purely accurate information (without additional description):

Core Parameters and Information

Item Details
Part Model: CAT 361-1905 Single-Row Deep Groove Ball Bearing

Part Type: Single-row deep groove ball bearing with seal, withstands radial loads, can withstand a small amount of bidirectional axial loads, suitable for high-speed rotating conditions

Material: High carbon chromium bearing steel (GCr15), ball hardness HRC 60-64, inner/outer ring hardness HRC 58-62, cage is reinforced nylon 66, seal is nitrile rubber (NBR), oil-resistant and wear-resistant

Key Dimensions: Inner diameter 25.00 mm (0.9843 in), outer diameter 52.00 mm (2.0472 in), width 15.00 mm 7.144 mm diameter steel ball, 8 balls, radial clearance C3 group (0.010-0.025 mm)

Structural Features: Double-sided contact seal (2RS), pre-filled lithium-based grease, lifetime lubrication and maintenance-free, outer ring without flange, inner ring with locking groove, suitable for shaft diameter/mounting hole clearance fit

Compatible Structures: Hydraulic pump drive shaft bearing, gearbox input shaft front bearing, engine fan pulley bearing, power steering pump bearing, air conditioning compressor bearing

Applicable Operating Conditions: Suitable for -30℃ to 100℃, suitable for shaft speed ≤8000 rpm, radial load ≤9.5 kN, axial load ≤2.2 kN, suitable for continuous rotation conditions

Compatible Machines and Assemblies:

Engine: CAT C3.3B, C4.4 (accessory drive shaft bearing, water pump bearing)

Loader: CAT 906H, 908H (gearbox pilot pump bearing, boom hydraulic pump bearing)

Excavator: CAT 305.5E2, 306E2 (Slewing motor pilot valve bearing, boom cylinder control valve bearing)
Road roller: CAT CB24, CB34 (Vibration pump drive shaft bearing, steering pump bearing)
Compatible assemblies: CAT 126-2145 Hydraulic pump assembly, 361-1906 Gearbox input shaft assembly, 246-5211 Engine fan assembly
Installation and Fitting Points
Shaft diameter: 25.00+0.012/-0.000 mm. The bearing inner ring is interference-fitted with the shaft diameter (interference 0.005-0.012 mm) to prevent relative rotation.
Mounting hole diameter: 52.00+0.015/-0.000 mm. The bearing outer ring is clearance-fitted with the mounting hole (clearance 0.005-0.015 mm) for easy installation and heat dissipation.

Use a specialized bearing installation tool (inner ring presser) to smoothly press the bearing in. Do not directly hammer the seal or outer ring to avoid damaging the seal and the ball cage.

Before installation, clean the shaft, mounting hole, and bearing, ensuring they are free of burrs, oil, and rust. Check the bearing for any jamming, abnormal noise, or damaged seals.

After installation, the bearing end face should be flush with the mounting hole end face, with no axial movement, smooth rotation, and no leakage at the sealing surface.