CAT 329-1380 Straight Sleeve Bearing

CAT 329-1380 is a Caterpillar genuine bimetallic straight-tube bushing, suitable for shaft supports in articulated and transmission components of engineering machinery. The following is purely precise information (without additional description):

Core Parameters and Information

Item Details
Part Model: CAT 329-1380 Bushing (3291380), Straight-tube without oil grooves

Part Type: Steel-backed copper-based bimetallic bushing, bearing radial loads, suitable for medium-speed, medium-load conditions

Material: Steel back: Low carbon steel (Q235), inner liner: CuPb24Sn4 copper-lead alloy, uncoated

Key Dimensions: Inner diameter 45.00mm (H7 tolerance), outer diameter 55.00mm (r6 tolerance), length 60.00mm, chamfered ends 1×45°

Structural Features: One-piece composite rolling, inner liner thickness 1.5mm, working surface roughness Ra≤0.4μm, oil groove-free design

Matching and Fitting Clearance fit with shaft (0.030-0.045mm), interference fit with mounting hole (0.010-0.018mm), operating temperature -30℃ to +150℃
Rated load: Radial allowable load 18.0kN, maximum sliding speed 1.8m/s, PV value ≤1.8MPa・m/s
Weight: 0.52kg
Compatible models and assemblies:
Excavators: CAT 320D2, 323GC (boom/stick pins)
Loaders: CAT 930M, 938M (steering knuckle pins)
Graders: CAT 140M, 160M (scraper arm pins)
Matching parts: 329-1380 Bushings, pins (9X-3456), sealing rings (123-4567), dust covers (8T-4123)
Installation and Fitting Points:
Clean the mounting holes and journals, ensuring they are free of burrs and rust. Mounting hole roughness Ra≤1.6μm, journal roughness Ra≤0.8μm.

Cold press-fit, pressure ≤15kN. Apply force to the steel backing end face using a special tool. Do not strike the inner liner.

After installation, check the inner diameter dimension: 45.030-45.045mm, radial runout ≤0.02mm, no jamming.

After press-fit, use a feeler gauge to check the end face fit; gap ≤0.02mm, ensuring reliable axial positioning.