Bearing types ppt

Bearings Built for Speed. These include ball bearings , roller bearings , ball thrust bearings , roller thrust bearings , tapered roller thrust bearings and linear bearings. A rotary bearing allows motion about a center, such as a wheel on a shaft or a shaft through a housing. Common kinds of rotary motion include both one-direction rotation and oscillation where the motion only goes through part of a revolution.

Plummer block or Pedestal bearing. It is a split type of bearing.

This type of bearing is used for higher speeds, heavy loads and large sizes. Two mild steel bolts and nuts. A bearing is a mechanical element that permits relative motion between two parts, such as the shaft and the housing, with minimum friction. Code for the bearing bore The code for the bearing bore indicates the bearing’s bore size. This number is multi- plied by fi ve to give the bore size.

This movement is either rotary (shaft rotating within a mount) or linear (one surface moving along another). Lubricant is used for slow moving and heavy weighted running on shaft. These bearings to support crack shaft, rocker arm of IC engine.

Review fitting and bearing clearance.

Select a proper lubricant, and feed it in proper quantity. Discoloration, softening and fusion of raceway and rolling element. Such type of bearings is also called as h ydrodynamic lubricated bearings. Rocker and pin bearings.

Different types of bearings for bridges include: Sliding bearings. Note 1: The raceway of thrust bearing is called raceway washer, the inner ring is called the shaft raceway washer and the outer ring is called the housing raceway washer. Rolling elements classify in two types : balls and rollers. Rollers come in four types : cylindrical, needle, tapere and spherical. Because of its structure, there is not a lot of contact with the balls on the inner and outer races.

For ball bearings, the Conra or non-slot fill bearing is the most common, whose design dispenses with a filling slot and instead relies on displacing the inner race to load the balls and a cage to keep them evenly spaced. Lets attempt to break it down. Ball bearings, as shown below, are probably the most common type of bearing. Note: In case there is no fourth digit, then the rd digit indicates the bore size in mm.

For example: in case of bearing 63 the bore size of the bearing will be 6mm. We will look into more detail on the lubrication aspects of the bearings in the forthcoming articles. Well we will now look into the classification of the bearings. They can be basically classified as.

When there is a relative motion between two machine parts, one of which supports the others. Sliding contact bearing - journal bearing - plane bearing 2.

The deep-groove ball bearing , Figure 2(a), is the most versatile. There are several types of ball bearings that fit specific needs. Radial loads and thrust-load capacities may be approximately equal in this bearing.

When it has the proper separator, it is very good for high-speed operation. The labyrinth seal is a non-contacting type normally used with sleeve bearings. This is important because misalignment is one of the big causes of bearing failure. Designed to take large axial loads as well as radial loads.

Intended for exclusively axial loads.