Bearing is an important part of contemporary machinery. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its accuracy.
Sliding bearings are not divided into inner and outer rings and have no rolling elements, and are generally made of wear-resistant materials. Commonly used for low speed, light load and lubrication, and mechanical rotation of difficult maintenance.
The sliding contact surface of the joint bearing is spherical, and is mainly suitable for oscillating motion, tilting motion and rotational motion.
Rolling bearings are divided into radial bearings and thrust bearings according to the load direction or nominal contact angle they can withstand. The radial contact bearing is a radial bearing with a nominal contact angle of 0, and the radial angular contact bearing is a radial bearing with a nominal contact angle greater than 0 to 45. The axial contact bearing is a thrust bearing with a nominal contact angle of 90, and the thrust angular contact bearing is a thrust bearing with a nominal contact angle greater than 45 but less than 90.
According to the shape of the rolling element, it can be divided into a ball bearing and a roller bearing. Roller bearings are divided into roller types: cylindrical roller bearings, needle roller bearings, tapered roller bearings and spherical roller bearings.
According to the work, it can be divided into self-aligning bearings----the raceway is spherical, and can adapt to the angular deviation and angular movement between the two raceways and the non-aligning bearings (rigid bearings) A bearing that can offset the axial angle of the track between the raceways.
According to the number of rows of rolling elements, it is divided into single row bearings, double row bearings and multi-row bearings.
Divided into separable bearings and non-separable bearings according to whether their components (ferrules) can be separated.
According to its structural shape (if there is no filling groove, the shape of the inner and outer rings and the ferrule, the structure of the rib, even the presence or absence of the cage) can also be divided into various structural types.
According to its outer diameter size, it is divided into miniature bearing (<26mm), small bearing (28-55mm), medium and small bearing (60-115), medium and large bearing (120-190mm), large bearing (200-430mm) and special Large bearings (>440mm).
According to the application field, it is divided into motor bearings, rolling mill bearings, main bearings and so on.
Divided into ceramic bearings, plastic bearings, etc.