Description
CAT 6V-9770 Needle Roller Bearing
| CAT 6V-9770 Needle Roller Bearing |
| CAT 168-6530 BRG |
| CAT 087-4970 SLEEVE |
| CAT 137-4515 58.5mm Thick Spacer |
| CAT 521-9951 BEARING-SEM |
| CAT 102-2701 BEARING |
| CAT 149-8652 BALL |
| CAT 595-2010 BEARING-SLEE |
The CAT 6V-9770 is a genuine Caterpillar needle roller bearing (with cage assembly), suitable for the suspension or drive systems of heavy machinery such as loaders and compactors. It is used to withstand radial loads and is designed for compact installation spaces. The following are the original manufacturer’s precise specifications and application information; replacement parts are not included.
Core Technical Parameters
Item Details
Part Model: CAT 6V-9770 (Needle Roller Bearing, Needle Roller and Cage Assembly)
Material: Needle Roller: 52100 high-carbon chromium bearing steel, hardness after quenching HRC 61-65, surface roughness Ra ≤ 0.04 μm; Cage: High-quality low-carbon steel, galvanized for rust prevention, tensile strength ≥ 350 MPa
Key Dimensions: Inner diameter 50 mm (1.969 in), outer diameter 65 mm (2.559 in), width 30 mm (1.181 in), needle roller diameter 3 mm, number of needle rollers 20, cage window size adapted for precise needle roller positioning
Single Weight: Approx. 0.28 kg (0.617 lbs)
Tolerance Standards: Inner diameter tolerance H7 (+0.030/0 mm), outer diameter tolerance h8 (0/-0.040 mm), width tolerance ±0.15 mm, needle roller diameter tolerance g5 (-0.002/-0.008 mm)
Core Characteristics: High radial load capacity (rated dynamic load 42 kN, rated static load 68 kN), low coefficient of friction (≤ 0.003), suitable for compact spaces, impact resistant, operating temperature -40℃ to +120℃, strong anti-contamination capability
Structure and Core Functions:
Radial Load Capacity: Distributes radial pressure through dense needle rollers, suitable for heavy-duty parts such as suspension and transmission, providing high load capacity in limited space and avoiding direct wear between shaft and housing.
Positioning and Guiding: The cage precisely fixes the needle roller spacing, preventing needle roller skewing and friction, ensuring bearing rotation accuracy, and reducing operating noise and vibration.
Compact Fit: The flat structure of needle roller bearings makes them suitable for parts with limited installation space, saving more axial and radial space compared to ball bearings and tapered roller bearings.
Compatible Models and Application Scenarios
Compatible Equipment: CAT 966D and 966E wheel loaders, 816B soil compactors, and some 140H and 160H graders (including boom pins, steering knuckles, etc.).
Core Purpose: Installed between the boom pin and the boom/housing, it bears radial loads and is suitable for construction machinery operating in scenarios involving frequent turning and lifting, ensuring flexible operation and extending the service life of components.
