Basics - bearing classification / composed / selection / installation

Classification, bearing

Sliding bearing: contact (numerous points of contact); suitable for very high speed, very low (load); shaft is suspended, the oil is very important.

Rolling bearings: metric bearing: point contact: light load speed;

Classification, bearing

Sliding bearing: contact (numerous points of contact); suitable for very high speed, very low (load); shaft is suspended, the oil is very important.

Rolling bearings: ball bearing: point contact: light load speed;

Roller bearings: linear contact: heavy-duty high-speed;

Two, bearing

The outer ring, inner ring, rolling body cage,: bearing retainer

Cage effect:

1, to prevent direct contact between the rolling body to reduce friction and heat generation;

2, the rolling body guide;

3, to provide lubrication space;

In 4, install or Uninstall can avoid a rolling body powder.

Three, the role of bearing

1, to support the shaft and parts on the shaft, to keep the rotating precision of shaft;

2, to reduce friction during rotation and wear;

Four, bearing selection principle

1, ball and roller combined bearing than the limit speed of roller bearing high, priority should be given to the selection of ball bearing;

2, at high speed to the selection of bearing, ultra light, super light and light series (inner diameter and outer diameter, the smaller, the rolling body is light and small, 

centrifugal inertial force is small);

3, cage materials has a great influence on bearing speed, solid cage than stamping cage to allow higher speed;

The speed limit is 4, thrust bearing is very low, when working at high speed, if the axial load is not very big, can use the angular contact ball bearings to bear pure axial 

force;

5, if the speed exceeds the bearing sample, can be used to improve the tolerance level, increasing the clearance, the circulating cooling method.

Rolling installation and disassembling bearing

Assembling and disassembling bearing, to pay special attention to the following two points:

1, do not allow the rolling body force, so as not to make the raceway and rolling body damage.‍