CAT 583-8088 130.281mm Inner Diameter Sleeve Bearing

CAT 583-8088 GD is a Caterpillar genuine hardened steel sleeve bearing (bushing), suitable for articulated rotating parts of hydraulic cylinders, connecting rod pins, or steering mechanisms, used to withstand radial loads and provide low-friction rotation. The following are core specifications and application information.

Core Technical Parameters

Item Details
Part Model: CAT 583-8088 GD (Hardened Steel Sleeve Bearing/Bushing, with Lubrication Groove and Oil Reservoir)

Material: Base material 4140 chromium-molybdenum steel, inner hole surface hardened to HRC 58-62, uniformly thick hardened layer (0.8-1.2 mm), suitable for heavy load and impact conditions; surface with axial lubrication groove, compatible with oil/grease lubrication

Key Dimensions: Inner diameter 45.2 mm (1.780 in), outer diameter 57.15 mm (2.250 in), length 41.28 mm (1.625 in), chamfer radius 0.8 mm, wall thickness 5.975 mm

Single Weight: Approx. 0.11 kg (0.243 lbs)

Tolerance Standards: Inner diameter tolerance H7 (+0.030/0 mm), outer diameter tolerance g6 (0/-0.019 mm), length tolerance ±0.10 mm, inner bore surface roughness Ra ≤ 0.4 μm, suitable for precision hinge requirements.

Core Characteristics: Radial load capacity 85 kN, static allowable load 120 kN, operating temperature -40℃ to +130℃, coefficient of friction 0.08-0.12 (grease lubrication), suitable for high-frequency oscillation and impact conditions in engineering machinery.

Structure and Core Functions: Heavy-duty wear-resistant design: 4140 chromium-molybdenum steel base + surface hardening treatment, uniform hardened layer, suitable for heavy-duty hinge parts such as hydraulic cylinder lugs and connecting rod pins, resisting impact and abrasive wear, extending component life.

Lubrication optimization: The inner bore has axial lubrication grooves and circumferential oil reservoirs to ensure uniform distribution of lubricating medium, reduce the risk of dry friction, and meet the lubrication requirements of intermittent operation and harsh working conditions in engineering machinery.

Clearance Compensation: Adapts to clearance fits with pins (recommended clearance 0.04-0.08 mm), compensating for manufacturing errors and wear at hinged joints, ensuring smooth rotation and reducing noise and jamming risks.

Easy Installation: Thin-walled cylindrical structure allows for cold press-fitting or liquid nitrogen shrink-fit installation, suitable for compact installation spaces such as hydraulic cylinders and steering knuckles, requiring no complex tooling.

Compatible Models and Application Scenarios

Compatible Equipment: CAT 307, 308 mini excavators, 906, 907 mini loaders, 420F, 430F backhoe loaders, CB-534 road rollers, etc.

Core Applications: Installed on boom cylinder lugs, stick cylinder pins, steering linkage pins, bucket hinge points, etc., providing low-friction rotation and heavy-duty support, suitable for frequent oscillation and impact load conditions, ensuring stable operation of the hydraulic system and transmission mechanism.