Description
CAT 8S-2195 14.28mm Needle Roller Bearing
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The CAT 8S-2195 is a Caterpillar single-row deep groove ball bearing, primarily designed for use in the gearbox output shaft, hydraulic pump drive shaft, or engine accessory shaft of Caterpillar 320D/336D excavators, 966K loaders, 140M graders, and other models. It is used to bear primarily radial loads with a small amount of bidirectional axial loads. It is compatible with Cat C6.4/C7.1/C9 engines and Cat 345B/C/D hydraulic systems, ensuring smooth operation of rotating parts, limiting radial runout, and preventing component wear or seal failure due to uneven radial loads. It is suitable for oil lubrication conditions, with a rated radial load ≥85 kN and a fatigue life ≥10,000 hours. The following is structured technical and application information:
Core Technical Parameters
Item Details
Basic Attributes
Model 8S-2195, single-row deep groove ball bearing, suitable for 320D/336D excavator gearbox output shaft, 966K loader hydraulic pump drive shaft, 140M grader engine accessory shaft, material is GCr15 chromium bearing steel (integral quenching HRC 60-64), cage is stamped steel plate, working temperature -40℃ to +120℃, single weight approximately 0.65 kg, suitable for SAE 15W-40 diesel engine oil lubrication, rated radial load ≥85 kN, rated axial load ≥12 kN, limiting speed 6000 rpm, fatigue life ≥10000 hours, used to bear radial load, limit radial runout, and ensure smooth operation of rotating parts
Key Dimensions
Inner diameter 50.00 mm (1.969 in, tolerance H7, +0.030/0 mm), outer diameter 90.00 mm (3.543 in, tolerance h6, 0/-0.016 mm), width 20.00 mm (0.787 in, tolerance ±0.10 mm), steel ball diameter 9.525 mm (8 balls), ball assembly pitch circle diameter 70.00 mm, radial clearance C3 (0.020-0.040 mm), shaft fit tolerance k6 (+0.015/+0.002 mm), bearing housing fit tolerance H7 (+0.030/0 mm) Material and Process: GCr15 chromium bearing steel → forging → rough grinding → quenching (850℃ oil quenching) → low temperature tempering (160℃) → fine grinding → assembly (steel balls + stamped cage) → rust prevention treatment, hardened layer depth 2.0-2.5 mm With high hardness, high wear resistance, and fatigue resistance, this bearing is suitable for medium-to-high speed and medium-load conditions in transmissions, hydraulic pumps, and engine accessories. It primarily bears radial loads, with a small amount of bidirectional axial load.
Compatible models include Cat 320D/336D excavators (C6.4/C7.1 engine), 966K/972M loaders (Cat 345D hydraulic system), 140M/160M graders (C9 engine), and 420F backhoe loaders (C6.6 engine). It is used for transmission output shafts, hydraulic pump drive shafts, and engine accessory shafts (such as fans, generators, and air conditioning compressors), bearing radial loads, limiting radial runout, and ensuring stable power transmission.
Assembly fit: Suitable for 50 mm diameter shafts (tolerance k6, +0.015/+0.002 mm), bearing outer diameter and bearing housing fit tolerance H7 (+0.030/0 mm), bearing end face and mounting surface contact area ≥90%, and radial clearance controlled after installation. 0.020-0.040 mm, compatible with M20×1.5 bolts (grade 10.9, preload torque 80-90 N・m), bearing-shaft coaxiality ≤0.03 mm.
Installation and Maintenance Points:
Before installation, clean the bearing, journal, and bearing housing. Check for scratches, rust, and cracks. Measure the bearing inner diameter and journal diameter, and the bearing outer diameter and bearing housing inner diameter to ensure the fit meets requirements. The bearing housing surface roughness Ra ≤1.6 μm, and the end face should be flat and free from deformation.
Use the cold mounting method for installation, ensuring the bearing and journal are coaxial. Do not directly strike the bearing end face with a hammer to prevent damage to the steel balls or cage. After installation, check the bearing’s rotational flexibility to ensure there is no jamming or abnormal noise, and the radial clearance meets C3 requirements.
Maintenance recommendations: Check the bearing wear every 2500 hours. If the raceway wear is >0.10 mm or there is pitting on the steel balls or deformation of the cage, replace it immediately. Change the machine oil regularly to keep the oil clean and avoid accelerated bearing wear due to oil contamination, which will affect the rotational accuracy and load-bearing capacity.
