CAT 252-5094 Flanged Sleeve Bushing

CAT 252-5094 is a Caterpillar flange-type sleeve bushing, adapted for the boom, stick, bucket pins, and track tensioning mechanisms of Cat 320D2, 336D2 and other excavators. It is used to bear radial loads and position the shaft system, reduce pin wear under oscillating and reciprocating conditions, and improve the stability of the connection parts (Cat® Parts). The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 252-5094, Type: Flange-type sleeve bushing (with self-lubricating layer), Material: Outer layer is low carbon steel (Q235), middle layer is bronze alloy, inner layer is PTFE self-lubricating composite material, flange is integrally molded, single weight is approximately 1.8 kg, Applicable temperature: -40℃ to +120℃, Lubrication method: self-lubricating + supplementary grease lubrication, Coefficient of friction ≤0.06

Key Dimensions
Inner diameter: 65.0 mm (tolerance 0/-0.015 mm), Outer diameter: 85.0 mm (tolerance 0/+0.02 mm), Total length: 80.0 mm (tolerance ±0.15 mm), Flange outer diameter: 100.0 mm (tolerance ±0.20 mm), Flange thickness: 10.0 mm (tolerance ±0.10 mm), Inner hole surface roughness Ra≤0.8 μm, Fit clearance 0.01-0.02 mm
Compatible Models and Applications: Compatible with Cat 320D2, 323D2, 336D2, 395 and other tracked excavators. Used for boom and stick connection pins, stick and bucket connection pins, and track tension cylinder support pins. Supporting parts include 296-1371 trunnions and 7T-4214 retainers for positioning pins, bearing radial loads, compensating for installation errors, and reducing wear between pins and supports.

Performance Parameters: Rated radial dynamic load 280 kN, rated radial static load 520 kN, wear life ≥8000 hours, permissible swing angle ≤±5°, compatible impact load ≤1.1 times rated dynamic load, self-lubricating layer wear limit 0.5 mm, maximum radial clearance 0.2 mm. mm
Structural and Performance Advantages

Flange Positioning Structure: The flange provides axial positioning, preventing the bushing from shifting within the mounting hole. It is suitable for areas with limited space at the pin end, simplifying the installation and positioning process and improving assembly efficiency.

Composite Self-Lubricating Material: The outer steel substrate ensures strength, the bronze intermediate layer enhances load-bearing capacity, and the PTFE inner layer reduces friction, minimizing lubrication dependence. It is suitable for oscillating conditions without continuous lubrication, extending maintenance intervals.

High-Precision Dimensional Control: Strict inner and outer diameter and length tolerances ensure precise fit with the pin and mounting hole, reducing impact and vibration caused by excessive clearance and improving the stability of the connection.

Suitable for Complex Working Conditions: It can withstand radial loads and slight angular deviations, making it suitable for frequently oscillating parts such as excavator booms and sticks. It offers excellent abrasion and impact resistance, reducing the risk of early failure (Cat® Parts).