7T-4971: Four Mounting Holes 28.50mm Steel Bearing Cap

CAT 7T-4971 is a Caterpillar 4-Bolt Steel Bearing Cap, suitable for positioning and sealing bearings in heavy-duty equipment. Key information is as follows:

Key Parameters
Item Details
Type: Split heavy-duty bearing cap, 4 symmetrical mounting holes, hole diameter 28.50mm (1.122 inches), with locating grooves and sealing surfaces, used to fix the bearing outer ring and seal the bearing cavity, suitable for differentials, gearboxes, etc.
Dimensions (Metric/Imperial): Inner diameter approx. 101.60mm (4.0 inches), outer diameter approx. 165.10mm (6.5 inches), thickness approx. 25.40mm (1.0 inch), 4 holes circumferentially distributed, hole spacing diameter 139.70mm (5.5 inches), locating groove width 12.70mm (0.5 inches)

Material: High-quality carbon steel (AISI 1045), quenched and tempered, tensile strength ≥600MPa, hardness… HB220-250; Surface galvanized + passivated for corrosion resistance; compatible with nitrile rubber (NBR) seals; oil resistant temperature -30℃~120℃.
Precision: Mounting hole position tolerance ≤0.05mm, flatness tolerance ≤0.03mm, inner diameter tolerance ±0.02mm, ensuring precise fit with bearing outer ring and housing.
Installation Method: Bolt tightening; preload torque 180-200N・m; uses sealing gaskets/rings; positioning groove prevents misalignment, ensuring reliable sealing and positioning.
Suitable Applications: Compatible with differential bearing housings and gearbox output shaft bearing end caps for Cat 966H/K loaders, D6T bulldozers, 320D/323D excavators, etc., used to fix the bearing outer ring, seal the bearing cavity, prevent lubricating oil leakage, and block dust and moisture intrusion. Suitable for heavy-duty working conditions such as mining and infrastructure, extending the service life of bearings and transmission components.

Commonly used for replacement during equipment maintenance/overhaul, compatible with original seals and fasteners, improving maintenance efficiency.

Performance Characteristics: Made of tempered carbon steel, offering strong resistance to deformation and impact, approximately 30% higher than ordinary cast iron bearing caps, suitable for high-frequency vibration and impact loads.

Four symmetrically distributed holes ensure even stress distribution during installation. The positioning groove design ensures precise installation. The flat sealing surface provides high sealing reliability, with a protection rating up to IP65.

Standardized design facilitates easy installation and quick replacement, reducing equipment downtime.

Matchings and Replacements:
Matching Seals: 7T-4966 gasket, 6V-3211 sealing ring; Matching Bolts: Grade 10.9 high-strength bolts (e.g., 12-9142, compatible with 28.50mm hole diameter). It is recommended to replace as a set to ensure sealing performance.

Direct Replacements: 7T-4972, 7T-4973, interchangeable and suitable for the same equipment and installation conditions.