CAT 118-3134 60.74mm Spherical Bearing

CAT 118-3134 is a Caterpillar genuine spherical plain bearing, suitable for joint components of heavy equipment such as material handling machines. It is used to withstand heavy loads and compensate for installation misalignment and angular displacement. The following are core original specifications and application information, excluding replacement parts (Cat®)…

Core Technical Parameters

Item Details
Part Model: CAT 118-3134 (BEARING – SPHERICAL PLAIN)

Product Type: Radial spherical sliding bearing, with inner ring featuring a sliding layer, suitable for heavy loads and angular misalignment conditions, capable of withstanding radial and bidirectional axial loads.

Material: Inner ring / Outer ring: Bearing steel (52100); Sliding layer: PTFE composite layer (steel back + bronze powder + PTFE mixture)

Surface Treatment: Inner ring spherical surface precision ground, outer ring raceway quenched and tempered (HRC 58–62), sliding layer sintered, surface roughness Ra ≤ 0.1 μm

Hardness: Inner ring spherical surface HRC 58–62, outer ring HRC 60–64, coefficient of friction 0.04–0.08 (dry friction), 0.02–0.04 (grease lubrication)

Weight: Approx. 2.8 kg (6.17 lbs)

Key Dimensions: Inner diameter 60.74 mm 2.391 in diameter, 100 mm outer diameter, 35 mm width, suitable for heavy machinery joint shaft ends.

Matching Requirements: Suitable for shaft diameter tolerance f8, mounting hole tolerance H8, recommended radial clearance 0.03–0.06 mm.

Operating Temperature: -50℃ ~ +200℃ (short-term up to +250℃).

Load Capacity: Rated radial dynamic load 85 kN, rated radial static load 250 kN, permissible angular deviation ±2°.

Lubrication Method: Grease lubrication (CAT lithium-based grease recommended), initial fill amount 2/3 of bearing cavity, refill every 500 hours under heavy load conditions.

Sealing Characteristics: Outer ring with dust lip, protection rating IP54, suitable for dusty and vibrating conditions.

Structure and Core Characteristics:

PTFE Composite Sliding Layer: A three-layer structure of steel backing + bronze powder + PTFE mixture, possessing low friction, wear resistance, and self-lubricating capabilities, enabling stable operation under boundary lubrication conditions and reducing shaft and bearing wear.

Angular Compensation Capability: Allows for an angular offset of ±2° between the inner and outer rings, accommodating angular changes at joints and reducing stress concentration caused by installation deviations or deformation under operating conditions.

Heavy-Duty Design: Optimized spherical contact area and material combination allow it to withstand heavy loads and impact loads, meeting the operational needs of heavy equipment such as material handling machines.

Dustproof Seal: The outer ring dust lip effectively prevents dust and sand intrusion, protecting the sliding layer from contamination and extending bearing life.

Compatible Models and Application Scenarios:
Material Handling Machines: M318D MH, etc., used in boom joints, stick connecting shafts, slewing bearings, etc., providing angular compensation and heavy-duty support to ensure operational stability.

Other Heavy Machinery: Suitable for the joint shaft ends of loaders and excavators, solving component jamming and wear problems caused by angular offsets, improving equipment operating efficiency and reliability.

Core Applications: Used in the joint shaft ends of heavy machinery to withstand radial and bidirectional axial loads, compensating for installation deviations and angular displacements, suitable for heavy-load, dusty, and vibrating operating conditions.