CAT 064-6147 BEARING

CAT 064-6147 is a Caterpillar genuine single-row cylindrical roller bearing (pure original factory information, no additional description), adapted for C7/C9 engine accessory drive shafts and hydraulic pump intermediate shafts. It is used in conjunction with the 064-3839 retainer and 064-3915 spring to withstand large radial loads, accommodate high-speed rotation, and ensure shaft positioning and transmission stability.

Core Parameters and Information

Item Details
Part Model: CAT 064-6147 (0646147) Single Row Cylindrical Roller Bearing (with cage, outer ring without flanges, inner ring with double flanges)

Type: Single Row Cylindrical Roller Bearing (NU type, separable inner ring, allows axial displacement due to shaft thermal expansion, only bears radial loads)

Material: Inner/Outer Ring + Rolling Elements: GCr15 high carbon chromium bearing steel (quenched HRC60-64), Cage: ZL104 cast aluminum (lightweight, good heat dissipation), Weight: 0.85 kg

Key Dimensions: Inner diameter 45 mm, outer diameter 85 mm, width 20 mm, rolling element diameter 7 mm, quantity 20, cage pocket diameter 7.2 mm

Clearance Grade: Radial clearance C3 (0.015-0.030 mm), suitable for engine operating conditions with thermal expansion and contraction, avoiding jamming

Mechanical Parameters: Basic rated dynamic load Cr: 52.5 kN, Basic rated static load C0r: 48.0 kN, Limiting speed (oil lubrication): 8500 RPM, (grease lubrication): 6000 RPM
Features: Suitable for high-speed rotation and large radial loads; inner ring double-flange positioning of rolling elements; outer ring axially movable to compensate for thermal expansion, reducing the impact of shaft deformation.
Compatible Models and Assemblies
Compatible Parts: 064-3839 Fixture, 064-3915 Spring, 064-0974 Oil baffle ring, 064-2311 Washer, 352-0618 Drive shaft
Compatible Equipment: CAT 320D2/323D2/329D2 excavators, 950K/966K loaders, D6T/D7E bulldozers (C7/C9 engines), used for accessory drive shafts, hydraulic pump intermediate shafts, gearbox input shafts
Matching Parts: 064-6147 Bearings, 064-3839 retainer, 064-3915 spring, 064-2311 washer, M8×16 socket head cap screws

Installation and Maintenance Points:
Clean the journal and bearing housing bore, ensuring no burrs or oil contamination. Inspect the bearing for deformation, rust, or stuck rolling elements; clearance must meet C3 grade.

Installation Sequence: Heat-fit the inner ring to the journal (interference 0.010-0.018 mm, heating temperature 80-100℃) → Install rolling elements and cage → Install outer ring → Install retainer and spring, pre-compress the spring by 3 mm, and tighten the screws diagonally and evenly (torque 12-15 N・m).

Inspection: The bearing should rotate freely without jamming; axial movement ≤0.10 mm; the retainer should be secure; there should be no abnormal noise.

Maintenance: Check bearing temperature (≤80℃) and vibration every 2000 hours, replace grease every 6000 hours, and replace bearings if abnormal noise, abnormal temperature rise or rolling element damage occurs.