Description
CAT 476-3240 Plastic Straight Roller
| CAT 476-3240 Plastic Straight Roller |
| CAT 116-8039 168mm Inner Diameter Push Arm Bearing |
| CAT 431-5968 Sleeve Bearing (Bushing) |
| CAT 7T-2879 Bulldozer Trunnion |
| CAT 505-1291 BEARING-SLEE |
| CAT 1U-3582 TRUNNION |
| CAT 510-7300 Self Aligning Spherical Plain Bearing |
| CAT 613-6168 152.4mm Inner Diameter Self-Aligning Bearing |
The CAT 476-3240 is a Caterpillar nylon plastic straight roller wheel, compatible with the cab sliding door/access cover guide mechanism of Cat 320/323/326 GC series excavators, 950GC/962GC loaders, and other models. Its core function is to provide low-friction linear guidance, absorb vibration, and reduce operating noise. The following is professional structured information.
Core Parameters (Professional Version)
Project Details
Basic Attributes
Model 476-3240, 2 pieces per unit (symmetrical arrangement), compatible guide rail width 22 mm, used for linear guidance of sliding doors/access covers in the cab, low friction, shock absorption, and noise reduction.
Key Dimensions
Roller outer diameter 45 mm (tolerance h7: 0–-0.015 mm), inner diameter 12 mm (tolerance H7: 0–+0.015 mm), width 18 mm, shaft hole depth 15 mm, mounting hole center distance 30 mm, positioning groove width 5 mm (tolerance ±0.1 mm)
Material and Process
Material is PA66 nylon (with 25% glass fiber reinforcement, flexural modulus ≥6000 MPa), surface coated with PTFE (friction coefficient ≤0.12), roller end face precision machined (flatness ≤0.02 mm), shaft hole inner surface roughness Ra≤0.8 μm
Performance Parameters Rated load capacity ≥500 N, operating temperature -30℃ to +80℃, sliding speed ≤0.5 m/s, wear life ≥50,000 cycles, oil resistance (compatible with Cat DEO-ULS engine oil/diesel), UV aging resistance (xenon lamp aging test ≥1000 hours).
Compatible models: Cat 320GC/323GC/326GC excavators, 950GC/962GC loaders, M318F wheeled excavators. Matching guide rail model 476-3246, mounting bracket 476-3247.
Installation and maintenance points: Before installation, clean the roller shaft hole and mounting bracket. Apply Cat MTO-1000 grease to the shaft hole. Tighten the M5×16 bolts to a torque of 8 N·m, ensuring a contact gap of 0.1–0.2 mm between the roller and the guide rail, without any jamming.
Maintenance Cycle: Check roller wear every 1000 hours (replace when outer diameter wear > 0.5 mm), clean the guide rail and apply grease. If jamming/abnormal noise is found, immediately check the roller rotation flexibility and installation torque.
Troubleshooting: If increased sliding resistance occurs, first check for roller PTFE coating wear and guide rail deformation. Replace the roller and guide rail if necessary.
