Outer Ring One Way Single Row Needle Roller Bearing

Description of needle roller bearing

HK series single row needle bearing is a kind of needle roller bearing with very small radial section size. It mainly consists of a thin wall stamping outer ring with needle roller and cage assembly. These types of bearings are favored in space-constrained industrial applications due to their compact structure and high load capacity.

Physical design of needle roller bearing

1.The stamping outer ring process is used to achieve a balance between lightweight and high rigidity, and the outer diameter tolerance is controlled within ±0.01mm
2.Single row needle roller arrangement design, axial bearing capacity of radial load up to 30%

Feature and advantage of needle roller bearing

The design of HK series bearing has its own unique features, mainly reflected in the following aspects:
1.Space saving: The height of the radial section of the bearing is very small, allowing it to be used in the case of a very compact internal space between the shaft and the bearing housing.
2.High load capacity: Despite their small size, thanks to the optimized design, these bearings have high load capacity and are able to withstand high radial loads.
3.Economical and convenient: The design of the stamped outer ring makes it ideal for economical and high volume production. When installing, the outer ring and the bearing box adopt static fit, no axial fixing device is needed, so the installation is very simple.
4.Sealing options: Depending on the needs of the environment, HK series can provide models with sealing rings (e.g., HK... -RS single side seal, HK... -2RS for double-sided seal), can effectively prevent the intrusion of contaminants and grease leakage.

Key selection and installation points of needle roller bearing

1.Shaft requirements: Since such bearings usually have no inner ring and the needle rolls directly on the shaft, the surface of the shaft with which it is required must be hardened and grinded, and the hardness usually needs to reach more than 670HV to ensure the raceway accuracy and service life.
2.Bearing seat hole tolerance: When the bearing seat material is steel or cast iron, the recommended hole tolerance is N6.
3.Lubrication: bearings can be lubricated by grease or oil. Sealed bearings are usually lubricated internally at the time of supply. It should be noted that the limit speed under grease lubrication is usually lower than that under oil lubrication.
4.Axial positioning: The bearing itself is positioned radially by pressing into the seat hole, but the needle roller and cage assembly must be positioned axally, which can be achieved by clenching rings or peripheral structures inside the housing.

Parameters