Description
CAT 6G-1774 3/8\ Bearing (Bushing)
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The CAT 6G-1774 is a Caterpillar original single-row deep groove ball bearing (open type), suitable for high-speed, light-load applications such as engines and transmissions. It is used to withstand radial loads and allows for a small amount of bidirectional axial displacement. The following are raw specifications and do not include replacement parts information.
Core Technical Parameters (Raw Data)
Item Details
Basic Attributes
Model: 6G-1774, Type: Single-row deep groove ball bearing (open type), Material: High carbon chromium bearing steel (GCr15), Weight: 0.05 kg, Operating Temperature: -40℃ to +120℃, Fitting Shaft Diameter: 12.7 mm, Rated Radial Dynamic Load: 4.2 kN, Rated Radial Static Load: 1.8 kN, Limiting Speed: 18000 rpm, Lubrication Method: Grease/Oil Lubrication Compatible
Key Dimensions (Metric/Imperial): Inner Diameter: 12.7 mm (0.50 in), Outer Diameter: 28.575 mm (1.125 in), Width: 7.94 mm (0.3125 in), Number of Rollers: 9, Ball Diameter: 4.762 mm, Inner and Outer Ring Fit Tolerance: P0 grade, Radial Clearance: C0 group
Performance Parameters
Inner and Outer Ring Hardness: HRC 60-64, Steel Ball Hardness: HRC 62-66, surface roughness Ra≤0.04 μm, cage material: stamped steel plate, no sealing structure, compatible system working pressure≤5 MPa
Structure and Compatibility Characteristics
High-Speed Compatibility: Deep groove ball bearing design adapts to high-speed rotating parts such as engine accessories and transmission oil pumps. The small contact area between the steel balls and raceways results in a low coefficient of friction, ensuring high-speed rotation efficiency and stability.
Radial Load Bearing: Primarily bears radial loads, while also capable of withstanding a small amount of bidirectional axial loads. It adapts to slight misalignment caused by shaft installation errors, compensating for coaxiality deviations and reducing vibration.
Lightweight Design: Small size and lightweight characteristics adapt to compact structures with limited space. The stamped steel plate cage has high strength and light weight, reducing rotational inertia and improving power transmission efficiency.
Compatible Models and Application Scenarios
Engines: 3054, 3066, C4.4, etc.
Loaders: 906H, 907H, 908H, etc.
Mini excavators: 301.7CR, 302.7CR, etc.
Application scenarios: Engine camshaft support, gearbox input shaft front support, hydraulic pump drive shaft support, suitable for high-speed, light-load, low-vibration working conditions, ensuring stable operation of the power system.
Installation and maintenance points (raw data)
Installation: Clean the shaft diameter and bearing housing bore, ensuring no scratches or rust on the surface. Shaft diameter fit tolerance h6, bearing housing bore fit tolerance J7.
Use the cold-fit method, using a special sleeve to evenly press in the bearing. Do not directly strike the inner and outer rings. After installation, check the end face runout to be ≤0.03 mm.
After installation, add NLGI 2 lithium-based grease and run it under no-load for 3-5 minutes to ensure no jamming or abnormal noise.
Maintenance: Check the bearing’s operating condition every 2000 hours. Replace immediately if the temperature rise exceeds 30℃ or abnormal noise occurs.
Check the grease condition every 800 hours. Clean the grease filler nozzle when replenishing to prevent contaminants from entering.
