4D-7541: 43.18mm Inner Diameter Slotted Head Steel Retainer

CAT 4D-7541 is a Caterpillar Grooved Head Steel Retainer used for securing shaft components and preventing loosening. It is suitable for bearings, gears, and other parts in heavy-duty equipment. Key information is as follows:

Key Parameters
Item Details
Type: Grooved head steel retainer with axial positioning groove, used to secure bearing inner rings, gears, or other shaft components to prevent axial movement during operation. Suitable for heavy-duty positioning conditions. Cat® Parts
Dimensions (Metric/Imperial): Inner diameter 43.18mm (1.700 inches), outer diameter 50.80mm (2.000 inches), thickness 6.35mm (0.250 inches), groove width 3.18mm (0.125 inches), suitable for corresponding journals and mounting space.

Material: High carbon steel (SCM435), quenched and tempered, hardness HRC58-62, blackened anodized surface for rust resistance and wear resistance. Suitable for heavy-duty impact conditions.
Precision Inner diameter tolerance ±0.01mm, outer diameter tolerance ±0.015mm, groove symmetry tolerance ≤0.01mm, ensuring precise fit with shaft and positioning parts.

Installation Method: Interference fit installation on the shaft; the groove is used to fit a flexible retaining ring or locating pin, achieving double anti-loosening and adapting to the long-term operation requirements of equipment.

Suitable Scenarios: Suitable for drive axles, gearboxes, engine crankshafts, etc., of equipment such as Cat 320D/336D excavators, 980G loaders, and D8T bulldozers. It is used to fix bearing inner rings, gears, or other shaft parts, preventing wear, vibration, and abnormal noise caused by axial movement.

Suitable for replacing worn retainers during equipment overhauls or parts replacement, eliminating the need to replace the entire shaft system assembly, reducing maintenance costs.

Performance Characteristics: Made of high-carbon steel, professionally heat-treated, with high fatigue strength, extending the lifespan by approximately 40% compared to ordinary carbon steel retainers, suitable for the long-term operation requirements of heavy equipment.

The grooved head design, combined with a flexible retaining ring or locating pin, provides double anti-loosening and anti-movement performance, approximately 60% better than ordinary retaining rings, making it suitable for heavy-duty, high-speed shaft systems.

The blackened anodized surface treatment offers excellent rust resistance, making it suitable for equipment used in harsh environments such as mining and infrastructure projects.

Alternative Models: Direct replacements for 4D-7542 and 8T-4171; interchangeable and suitable for the same equipment and installation conditions.