CAT 384-3460 Cap-Bearing-Gd

CAT 384-3460 YM is a Caterpillar steel-backed bronze straight-tube bushing bearing (sleeve), commonly used in the hinge joints of the working devices of graders, loaders, and other equipment. It is suitable for medium loads and low-speed oscillating conditions. The following is precise technical and application information.

Core Parameters (Precise Version)

Project Details
Basic Attributes
Model 384-3460 YM, Straight-tube sleeve bearing (bushing), bearing radial load, suitable for working device hinges and swing mechanisms, 1-2 pieces per unit, non-engine shaft system component

Compatible Models: Cat 140K/160K graders, 950H/966L loaders, 307/308 excavators, suitable for boom/stick hinge pins, tilt bracket pins, matching pin models 384-3461, bearing housing 384-3462

Material and Process: Steel-backed bronze (CuSn8P), steel backing hardness HB 180-220, bronze layer thickness 0.5-1.0mm, self-lubricating surface, no oil groove (relies on periodic grease injection), precision grade IT11, tolerance fit H7

Key Dimensions: Inner diameter 45mm, outer diameter 55mm, length 38mm, wall thickness 5mm diameter, chamfer R0.8mm, weight approx. 0.25kg

Performance Parameters: Basic rated dynamic load 18kN, basic rated static load 42kN, allowable speed ≤500rpm (grease lubrication), operating temperature -30℃ to +120℃, installation interference 0.02-0.04mm

Core Functions and Application Scenarios:

Load Support: Bears radial load ≤15kN at the hinge of the working device, suitable for frequent swinging conditions (swing angle ±45°), ensuring coaxiality of the pin and bearing housing, reducing vibration and noise.

Wear Protection: The bronze layer provides self-lubrication, reducing friction and wear between the pin and bearing housing, suitable for harsh working conditions such as outdoor dust and gravel, extending the service life of the pin and bearing housing.

Typical Locations: Grader tilt bracket hinge, excavator boom and stick hinge end, loader bucket pin bushing, mates with pins and bearing housings to provide stable support and flexible swing space for the working device.

Installation and Maintenance Points

Before Installation: Clean the bearing housing bore and pin, and check the bearing for deformation, cracks, or bronze layer peeling. Measure the interference fit between the bearing housing bore and the bearing outer diameter; it should be 0.02-0.04mm. Prepare a dedicated press-in tool (press-in pressure approximately 3-5kN).

During Installation: Maintain coaxiality during press-in, applying uniform pressure. After press-in, check the bearing end face runout; it should be ≤0.15mm. After installation, inject NLGI 2 lithium-based grease to ensure adequate lubrication.

Maintenance and Replacement: Check wear and lubrication every 1500 hours. If the bearing inner diameter wear exceeds 0.2mm or the bronze layer peels off, replace it immediately. Do not attempt to repair by welding or surface treatment.