Miniature bearings refers to metric, outer diameter of less than 9mm; British series, various types of bearings is less than 9.525mm outer diameter! mainly made of carbon steel, bearing steel, stainless steel, plastics, ceramics, and minimal internal diameter of which can be done 0.6mm, diameter of 1mm more.

1. micro bearing structure

Single row deep groove ball bearings are bearings in the most widely used, they generally only take radial loads, intelligent bear a small axial loads, can withstand high speeds. In some low-speed situations, require a very high accuracy to meet the requirements of the bearing.

2. micro bearing lubrication

(1) bearing lubrication

Lubrication on the fatigue life of rolling bearings and friction, abrasion, temperature, vibrations, which are important, without normal lubrication, the bearings will not work. Analysis cause of bearing damage indicate that about 40% of bearing damage is related to poor lubrication. Therefore, good lubrication of the bearings is effective measures to reduce friction and wear. In addition, the bearing lubrication as well as heat, rust, seal, reducing impact multiple roles.

(2) the grease lubrication

Grease lubrication is made up of base oil and thickener and additive lubricant when you select, choose run oil is ideal for bearing condition, due to the different trademarks, there will also be major differences in performance, so when you select, you must be careful.

Bearing grease calcium-complex grease, sodium calcium base grease, lithium-based grease with molybdenum disulfide grease.

(3) lubrication oil

In the telling, high temperature conditions, when grease lubrication is not adapted to the use of lubricated. By oil circulation and can take a lot of heat.

(4) the viscosity

Viscosity is the key characteristics of lubricating oil, directly affect the viscosity of lubricating oils of fluidity and friction surfaces of oil film thickness, bearing operating temperature oil viscosity is generally 12-15cst. High speed, low viscosity to be elected, the heavier loads should be selected high viscosity. Commonly used lubricant oil, high-speed machinery oils, turbine oil, compressor oil, transformer oil, cylinder oil.