CAT 034-6209 BEARING

CAT 034-6209 is a Caterpillar genuine single-row deep groove ball bearing (pure original factory information, no additional description). It is compatible with 032-8972 locating ring, 034-4888 end cap, and 032-8014 elastic retaining ring. It is used in the hydraulic pump, gearbox, and travel mechanism shafts of excavators/loaders, etc., bearing radial loads. It is compatible with 031-4772/031-4773 retainers and 030-3328 bushings.

Core Parameters and Information

Item Details
Part Model: CAT 034-6209 (0346209) Single Row Deep Groove Ball Bearing

Part Type: Radial Deep Groove Ball Bearing, primarily bearing radial loads, capable of withstanding small amounts of bidirectional axial loads

Material: Bearing steel (GCr15), quenched and tempered, hardness HRC60-64, elastic modulus 208 GPa, tensile strength ≥1800 MPa

Key Dimensions: Inner diameter 45 mm, outer diameter 85 mm, width 19 mm, ball diameter 11.906 mm, number of balls 10, cage outer diameter 65 mm, inner ring width 19 mm, outer ring width 19 mm

Structural Features: Outer ring with retaining groove + retaining ring, stamped steel plate cage on both sides, double-sided iron seal (ZZ), sealing lip contact type, protection rating IP54

Surface Treatment: Inner ring, outer ring, and rolling elements surface bright quenched, no additional coating, rust resistance depends on the working environment

Matching Method The inner ring has an interference fit with the shaft diameter of 45 mm (interference 0.01-0.03 mm), and the outer ring has a clearance fit with the housing (clearance 0.01-0.02 mm).

Working Performance: Rated radial dynamic load 34.5 kN, rated radial static load 20.4 kN, limiting speed 8500 r/min (grease lubrication), operating temperature -40℃ to +120℃

Weight: 0.41 kg (single piece)

Compatible Models and Assemblies:

Compatible Parts: CAT 032-8972 locating ring, CAT 034-4888 end cap, CAT 032-8014 elastic retaining ring, CAT 031-4772/031-4773 retainer, CAT 030-3328 bushing

Compatible Equipment: CAT 320D/323D excavator, 950H/966H Hydraulic pumps, gearboxes, and travel mechanism shafts for loaders and D7E bulldozers

Supporting parts: 034-6209 bearing, 032-8972 locating ring, 034-4888 end cap, 032-8014 elastic retaining ring, 031-4772/031-4773 retainer, 030-3328 bushing

Installation and maintenance points: Before installation, clean the journal and bearing housing bore, ensuring no burrs or rust. Apply a small amount of grease (lithium-based grease, NLGI 2).

Heat the inner ring using the hot fitting method (oil temperature 80-100℃) and then fit it onto the journal. After cooling, ensure an interference fit between the inner ring and the shaft, guaranteeing the inner ring end face mates with the shaft shoulder.

Install the 034-4888 end cap and 032-8972 locating ring, then install the 032-8014 elastic retaining ring, ensuring the retaining ring is properly seated in the shaft groove and that the bearing has no axial movement.

After installation, check that the radial clearance is 0.01-0.02 mm, the axial movement is ≤0.05 mm, and the bearing rotates freely without jamming.

Maintenance: Inspect every 1000 working hours. Replace the bearing if it exhibits abnormal noise, increased vibration, or wear (radial clearance >0.1 mm). Simultaneously check the condition of the journal and mating parts.