How to choose the right bearing for you

1. Selection of NTN bearing models: NTN bearing models are generally selected by the user's technicians according to the operating conditions of the supporting products and the load bearing. The business personnel mainly understand whether the actual load of the user is consistent with the selected NTN bearing. If the NTN imported bearing does not meet the requirements for use, the customer should be recommended to re-select the model as soon as possible, but unless the special product is selected on the model, there will be no problem.

2, NTN bearing clearance selection: users generally only know what type and grade when purchasing NTN bearings, rarely ask for NTN bearing clearance, business personnel must ask NTN bearing conditions, which NTN The bearing speed, temperature, and tolerance are directly related to the choice of NTN bearing clearance. Motors with a speed of 3,500 rpm or less generally use CM clearance. For example, high-temperature high-speed motors require relatively large clearance. Japan's NTN bearing clearance will be reduced after assembly due to the increase of the inner hole and the reduction of the outer circle. The reduction of the clearance = the interference amount × 60% (except for the NTN bearing chamber is aluminum). For example, the NTN bearing has a clearance of 0.01 mm before assembly and an interference of 0.01 mm when assembled. The clearance of the NTN bearing after assembly is 0.004 mm. In theory, the noise and life of the NTN bearing are in the best state at zero clearance, but in the actual operation, considering the temperature rise and other issues, the NTN bearing is preferably 0.002mm-0.004mm after assembly.

3, the choice of grease: the choice of grease is generally based on the NTN bearing speed, temperature resistance, noise requirements and starting torque, etc., requiring business personnel to understand the performance of various greases.

4, NTN imported bearing seal type selection: NTN bearing lubrication can be divided into oil lubrication and grease lubrication. Oil-lubricated NTN bearings are generally selected in the form of NTN bearings. Grease-lubricated NTN bearings are generally sealed with dust caps or rubber seals. The dust cover is suitable for high temperature or good environment. The seal is divided into contact seal and non-contact seal. The contact seal has good dustproof performance but large starting torque. The non-connected seal has small starting torque but sealing performance. No contact is good.

NTN bearings are currently specialized in the manufacture of automotive motor NTN bearings, home appliance motor NTN bearings, motorcycle NTN bearings, health care motors NTN bearings, etc., to achieve the best noise and life of NTN bearings.