CAT 422-6920 BEARING-GD

CAT 422-6920 YM is a Caterpillar genuine composite coated sleeve bearing (used in bulldozer travel mechanisms/loader suspension systems, suitable for heavy-duty oscillating parts). The following is the original data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model 422-6920 YM, type is straight-tube composite coated sleeve bearing, material is low carbon steel base material + bronze powder layer + PTFE mixed coating, single weight 1.25 kg, working temperature -40℃ to +120℃, suitable for pin clearance 0.06-0.12 mm, suitable for heavy load, low speed oscillation (≤8 rpm), suitable for mineral oil / hydraulic oil / water-based coolant

Key Dimensions
Inner diameter 75 mm (2.953 in), outer diameter 95 mm (3.740 in), length 120 mm (4.724 in), wall thickness 10 mm, chamfer at both ends r2.5 mm, inner diameter tolerance +0.025/-0 mm, outer diameter tolerance 0/-0.020 mm, length tolerance ±0.25 mm, coating thickness 0.25-0.35 mm mm, surface roughness Ra 0.3 μm
Compatible Models and Parts: Compatible with Cat D6R/D6T bulldozer idler wheel bracket pins, and 966H loader rocker arm and frame connection pins. One piece per location. Bears radial load, reduces pin and pin hole wear, and controls component radial displacement.

Performance Parameters: Radial load capacity ≥95 kN, dry friction coefficient μ≤0.07, wear life ≥6000 hours, compressive strength ≥1600 MPa, coating adhesion ≥6 MPa, can be repeatedly disassembled and reassembled ≥35 times (without significant wear).

Structural and Performance Advantages:
Composite coating system: The substrate ensures structural strength, the bronze layer bears load and conducts heat, and the PTFE coating reduces friction, suitable for oil-free/boundary lubrication conditions, with excellent impact resistance and wear resistance.

Precision Dimensional Tolerances: Strictly controlled inner and outer diameter and length tolerances ensure precise fit with pins and pin holes, avoiding impact vibrations caused by excessive clearance and improving component operational stability.

High adaptability to various operating conditions: Suitable for heavy-duty and frequent oscillation scenarios in engineering machinery, it can withstand various media and maintain stable performance under harsh conditions, extending the maintenance cycle of the entire machine.

Installation and Maintenance Points (Original Data)

Installation: Clean the pin hole and bearing surface. Use the cold mounting method (liquid nitrogen cooling to -196℃, holding for 20 minutes) or the press-fit method (pressure ≤60 kN) to ensure that the bearing end face is flush with the pin hole end face. After installation, the inner diameter roundness should be ≤0.020 mm.

Maintenance: Check for wear every 2500 hours. Replace when the radial clearance is >0.25 mm. Add NLGI Grade 2 lithium-based grease every 600 hours to avoid overload and uneven load conditions.

Troubleshooting: For excessively rapid wear, check lubrication and load distribution; for looseness, check the installation pressure and tolerance; for abnormal noise, confirm the clearance between the pin and bearing and replace it promptly.