CAT 583-8070 General Duty Sleeve Bearing

CAT 583-8070 GD is a Caterpillar general-purpose straight-tube sleeve bearing, suitable for the boom/stick joints of excavators, loaders, and other equipment, used for radial support and low-friction rotation. The following is professional structured information.

Core Technical Parameters (Professional Version)

Item Details
Basic Attributes
Model 583-8070 GD, General-purpose straight sleeve bearing, single weight 0.85 kg, 2 pieces per unit (stick/boom joint), compatible pin φ70.0 mm, radial clearance 0.10–0.15 mm, with axial flange positioning, compatible with Cat 1U-8888 grease

Key Dimensions
Inner diameter φ70.0 mm (tolerance H8: 0–+0.052 mm), outer diameter φ85.0 mm (tolerance r7: +0.034–+0.060 mm, interference fit), total length 42.0 mm (tolerance ±0.15 mm), flange diameter φ92.0 mm, flange thickness 4.0 mm, positioning step height 6.0 mm, surface roughness Ra≤3.2 μm

Material and Process
Material is SCM440 Alloy structural steel, quenched and tempered (HB 240–270), hard chrome plated inner bore (thickness 0.05–0.08 mm, HV≥800), blackened outer circumference (salt spray resistance ≥200 h), 3 spiral oil grooves in the inner bore (3 mm wide × 1.2 mm deep), rounded corners R1.5 mm at both ends.

Performance Parameters: Operating temperature -30℃ to +160℃, radial load ≥35 kN, rated PV value 1.8 MPa・m/s, surface hardness of compatible pins HRC≥45, lubrication cycle 500 hours, rated life ≥5000 hours, resistant to corrosion from hydraulic oil/gear oil in construction machinery.

Compatible Models: Excavators 320GC/323GC, loaders 966M/972M, compatible with boom lower hinge point and stick upper hinge point pins, with matching φ70 mm × φ85 mm mounting holes, compatible with Cat. 9X-9412 Pin

Installation and Maintenance Points:
**Before installation, clean the bearing housing bore and bearing surface, checking for cracks/rust. Apply Cat 105-7900 anti-seize compound to the outer diameter and press in using a hydraulic press (pressing force 25–30 kN), ensuring the flange fits snugly against the bearing housing end face (gap ≤ 0.1 mm).

Gap Control: After installation, use a feeler gauge to check the gap between the inner bore and the pin. If the gap is < 0.08 mm, the bearing must be replaced to prevent dry friction from causing the pin to seize.

Maintenance Requirements: Every 500 hours, add Cat 1U-8888 grease (50–80 g per area). Check the bearing’s rotational flexibility. If abnormal noise/seizing occurs, first check for blocked lubrication channels or abnormal gaps.

Troubleshooting: If the bearing outer ring is loose, check for wear in the bearing housing bore (wear > 0.1 mm requires repair or replacement of the bearing housing). Replace the bearing with a new one and ensure a reliable interference fit.