CAT 150-0812 BEARING

CAT 150-0812 is a Caterpillar genuine single-row tapered roller bearing (including inner and outer rings), suitable for medium and heavy-duty construction machinery drive axles, main reducers, and other components subjected to complex stresses. The following are precise original factory specifications and application information, excluding replacement parts.

Core Technical Parameters

Item Details
Part Model: CAT 150-0812 (Single Row Tapered Roller Bearing, including inner ring cone + outer ring cup)

Material: Inner ring/outer ring/roller are made of high carbon chromium bearing steel (AISI 52100), hardness 60–64 HRC; cage is made of stamped steel plate, galvanized for corrosion protection.

Key Dimensions: Inner diameter 90 mm (3.543 in), outer diameter 150 mm (5.906 in), width 40 mm (1.575 in), cone angle 10°, chamfer radius r=2.5 mm

Rated Parameters: Radial rated dynamic load 145.0 kN, radial rated static load 178.0 kN; Axial rated dynamic load 70.0 kN, axial rated static load 95.0 kN; Limiting speed 3800 rpm (oil lubrication), 2600 rpm (grease lubrication); Operating temperature -30℃ ~ +120℃
Single Weight: Approx. 2.85 kg (6.283 lbs)
Tolerances: Inner diameter tolerance P6, outer diameter tolerance P6, radial clearance C3, contact angle accuracy ±15′, radial runout ≤ 0.018 mm, surface roughness Ra ≤ 0.4 μm
Surface Treatment: Blackened inner and outer ring surfaces, polished roller surfaces, suitable for oil or grease lubrication, improving fatigue resistance and wear resistance.
Structure and Core Characteristics:
Single-row tapered roller structure: The rollers and raceways have a tapered contact, capable of simultaneously bearing large radial loads and unidirectional axial loads, suitable for drive axles, main reducers, and other composite stress components, transmitting heavy loads and absorbing vibrations.

Modular Design: Inner ring, outer ring, rollers, and cage are supplied as a single unit, facilitating installation and precise positioning, suitable for compact spaces in medium and heavy-duty equipment drive axles, and easy maintenance and replacement.

High-precision manufacturing: P6 tolerance and C3 clearance ensure stable operation at low and medium speeds, reducing vibration and noise, suitable for heavy-duty operations of medium and heavy-duty equipment such as loaders and excavators.

Impact-resistant reinforcement: The stamped steel plate cage has strong impact resistance, suitable for harsh working conditions such as mining and infrastructure construction, extending bearing life and reducing downtime due to failures.

Compatible Models and Application Scenarios

Compatible Equipment: CAT 950M/962M loaders, 320GC/330GC excavators, D5K2 bulldozers, and other medium and heavy-duty construction machinery.

Core Applications: Used in drive axle main reducers, differential housings, drive shaft supports, etc., to transmit heavy loads, absorb vibration, and ensure stable operation of components, suitable for medium and heavy-duty working conditions such as mining and infrastructure construction.

Installation and Maintenance Points

Installation: Clean the shaft and bearing housing holes, remove burrs and oil stains, and check the bearing for cracks, undamaged rollers, and smooth rotation.

Install using a cold-pressing method. Apply pressure evenly to the end faces of the inner and outer rings using specialized tooling; do not strike. After installation, ensure a tight fit between the bearing and shaft (0.012–0.020 mm) with no looseness.

After installation, adjust the axial clearance to 0.025–0.040 mm to ensure operational flexibility and load-bearing capacity.