CAT 068-6733 Needle Thrust Roller Bearing

CAT 068-6733 is a Caterpillar original single-row deep groove ball bearing (open type), suitable for high-speed, light-load components such as small engines and hydraulic pumps. The following is pure original data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes Model 068-6733, Type Single Row Deep Groove Ball Bearing (Open), Material High Carbon Chromium Bearing Steel (GCr15), Weight 0.08 kg, Operating Temperature -40℃ to +120℃, Fitting Shaft Diameter 15 mm, Rated Radial Dynamic Load 5.1 kN, Rated Radial Static Load 2.3 kN, Limiting Speed ​​16000 rpm, Lubrication Method Grease/Oil Lubrication Compatible

Key Dimensions (Metric/Imperial) Inner Diameter 15 mm (0.591 in), Outer Diameter 35 mm (1.378 in), Width 11 mm (0.433 in), Number of Rollers 8, Ball Diameter 5.556 mm, Inner and Outer Ring Fit Tolerance P0, 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 is stamped steel plate, no sealing structure, compatible system working pressure≤5 MPa

Structure and Compatibility Characteristics

High-Speed ​​Compatibility: The deep groove ball joint structure has a low coefficient of friction, suitable for high-speed rotating parts such as engine camshafts and hydraulic pump drive shafts, ensuring rotational efficiency and stability.

Radial Load Bearing: Primarily bears radial loads, can withstand a small amount of bidirectional axial loads, compensates for slight misalignment caused by shaft installation errors, and reduces vibration.

Lightweight Design: Small size adapts to a compact structure; 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: Small engines such as 3024C and 3044C.

Hydraulic Pumps: Gear pumps, small piston pumps, etc.

Small Machinery: Auxiliary components for mini excavators such as 301.5 and 301.7.

Application Scenarios: Engine valve mechanisms, hydraulic pump input shaft supports, small transmission systems, suitable for high-speed, light-load, and low-vibration conditions, ensuring stable operation of the power system. Installation and Maintenance Points (Original Data)

Installation: Clean the shaft diameter and bearing housing bore, ensuring the surface is free of scratches and rust. The shaft diameter fit tolerance is h6, and the bearing housing bore fit tolerance is J7.

Cold fitting method: Use a special sleeve to evenly press the shaft in. Do not strike the inner or outer rings. The runout of the installed rear face should be ≤0.03 mm.

Add NLGI 2 lithium-based grease. Run the grease under no-load for 3-5 minutes to ensure there is no jamming or abnormal noise.

Maintenance: Check the operating status every 2000 hours. Replace the grease if the temperature rise exceeds 30℃ or abnormal noise occurs.

Check the grease every 800 hours. Clean the grease filler nozzle when replenishing to prevent contaminants from entering.