1、 Selection of bearings

The main issue with the procurement of bearings lies in their selection. Lizz Bearing has compiled several key points for bearing selection, and LIGZZ Bearing provides you with one-stop bearing selection and procurement services:

1. Selection of bearing model: The bearing model is generally selected by the user's technical personnel based on the usage conditions and load-bearing capacity of the supporting product. Business personnel mainly understand whether the actual load of the user matches the selected bearing. If the bearing does not meet the usage requirements, they should suggest the customer to choose a different model as soon as possible. However, unless there are special products, there should generally be no problems in selecting the model.

2. Selection of bearing clearance: Users usually only inform them of the model and grade of the bearing when purchasing it, and rarely make requirements for the bearing clearance. Business personnel must inquire about the usage conditions of the bearing, including the speed, temperature, and fit tolerance of the bearing, which are directly related to the selection of bearing clearance. Generally, motors with speeds below 3500 rpm use CM clearance, while high-temperature and high-speed motors require relatively larger clearance. The clearance of the bearing will decrease after assembly due to the increase in the inner hole and the decrease in the outer circle. The reduction in clearance is equal to the interference fit × 60% (except for bearing chambers made of aluminum). For example, if the clearance before bearing assembly is 0.01mm and the interference during assembly is 0.01mm, the clearance after bearing assembly is 0.004mm. In theory, bearings achieve optimal noise and lifespan at zero clearance, but in practical operation, considering issues such as temperature rise, it is better for bearings to have a clearance of 0.002mm to 0.004mm after assembly.

3. Selection of grease: The selection of grease is generally based on the speed, temperature resistance, noise requirements, and starting torque of the bearing, and requires business personnel to have a good understanding of the performance of various greases.

4. The selection of bearing sealing type: The lubrication of bearings can be divided into oil lubrication and grease lubrication. Oil lubricated bearings generally use formal bearings, while grease lubricated bearings generally use dust covers or rubber seals for sealing. Dust covers are suitable for areas with high temperatures or good usage environments. There are two types of seals: contact seals and non-contact seals. Contact seals have good dust prevention performance but large starting torque, while non-contact seals have small starting torque but not as good sealing performance as contact seals. Lizz bearings are currently professionally manufactured in industries such as automotive motor bearings, household appliance motor bearings, motorcycle bearings, and health motor bearings, achieving optimal noise and lifespan of the bearings.