CAT 305-5853 BUSH

CAT 305-5853 is a Caterpillar genuine 15mm inner diameter flange bushing, adapted for the connection between the cab door linkage and the frame. It supports rotating/sliding components, reduces friction, suppresses vibration, and ensures smooth door opening and closing. The following are key Cat® information…

Core Technical Parameters

Item Details
Part Model: CAT 305-5853 (Flange Bushing, Carbon Steel Stamping + Low Friction Coating, with Radial Positioning Flange and Inner Hole Lubrication Groove)

Material: Low carbon steel base + PTFE composite coating, coating thickness 0.08-0.12 mm, hardness HV 200-240, suitable for operating conditions from -40℃ to +120℃

Key Dimensions: Inner diameter 15 mm (0.5906 in), outer diameter 22 mm (0.8661 in), flange diameter 28 mm (1.1024 in), flange thickness 3 mm, total length 18 mm (0.7087 in)

Unit Weight: Approx. 0.032 kg (0.0705 lbs)

Tolerances and Geometric Positions: Inner diameter tolerance +0.02/+0.05 mm, outer diameter tolerance -0.03/-0.06 mm, flange face runout ≤ 0.05 mm, inner bore cylindricity ≤ 0.03 mm

Core Function: Supports the door linkage shaft, reduces opening and closing friction and noise, suppresses vibration transmission, provides axial positioning, and is suitable for frequent reciprocating motion conditions.

Structure and Core Functions:

Flange Positioning Structure: The flange fits snugly against the mounting surface, preventing axial movement of the bushing. Positioning accuracy is ±0.10 mm, suitable for bolt fixing installation, improving connection stability.

Low Friction Coating: The inner bore PTFE coating has a friction coefficient ≤ 0.12, providing oil-free self-lubrication, suitable for low-speed (≤50 rpm) and frequent start-stop conditions of the door, reducing wear.

Lightweight and High-Strength: One-piece stamping of carbon steel, lightweight (approximately 32g), tensile strength ≥ 345 MPa, impact load resistance ≥ 5 kN, suitable for complex working conditions.

Corrosion-Resistant and Durable: Surface galvanized passivation treatment, no red rust after 72 hours of neutral salt spray testing, suitable for outdoor humid and dusty conditions, extending service life.

Compatible Models and Application Scenarios

Compatible Equipment: CAT 320D/323D/326D excavators, 950M/962M loaders, 420F2 backhoe loaders, and other cab door systems.

Core Purpose: Installed at the pin connecting the door linkage and the chassis, it supports the pivot, reduces friction, suppresses vibration, ensures smooth door opening and closing, and is suitable for frequently reciprocating motion components.