Types of Bearingss

Single Row Deep Groove Ball Bearings:
This bearing consists of inner and outer rings with deep symmetrical ball race, ways, separator and complement of Balls. This bearing is designed primarily for radial load but due to it's design features it is capable of carrying equal amount of thrust load in either direction and is capable of operating at high speed too. This bearing has the lowest frictional losses and therefore, it is the most widely used among all types of bearings.

Double Row Deep Groove Ball Bearings:
Double row deep groove bearing embodied the same design principle as that of the single row deep groove ball bearings. The bearing has a lower axial displacement than it occurs in the single row deep groove ball bearing. These bearings are capable of carrying substantial thrust loads in either direction and due to double rows of ball they are also capable of carrying high radial loads too.

Magneto Type Ball Bearings:
In this type of bearings the inner ring is same to that of deep groove ball bearings but the track on outer race has one shoulder. At the deepest position the groove track merges into the cylindrical track and therefore this bearing has a character of separable outer race. Magneto type bearings may be loaded radially and in one direction axially, generally they are mounted in pairs and adjusted against each other with a small amount of end play. Usually these bearings are available in smaller size only.

Angular Contact Ball Bearings:
Angular contact bearings are single row ball bearings but designed in such a way that the central line of the contact between balls and race ways is at an angle. This angle is called a contact angle and as per the manufactured design these vary between 15o, 25o,45o In this type of bearings contact angles between balls and tracks have been swung to an angle between 20o to 40o to the radial plane. These bearings are capable of carrying higher axial loads than the corresponding deep groove ball bearings, but in one direction only. These bearings are eminently suitable where heavy thrust loads are encountered at high speeds. Usually these bearings are mounted in pairs and adjusted axially against each other so that they may support combination of heavy radial and thrust loads.

Double Row Angular Contact Ball Bearings:
The design of these bearings corresponds to a pair of single row angular contact. These bearings are available either with no axial play or with limited amount of axial play. Double row angular contact bearings are characterized by a high load carrying capacity. They can carry substantial amount of radial load as well as axial load. These bearings are particularly suitable where rigid axial location of rotating mechanism is necessary.

Double Row Self Aligning Ball Bearings:
In this type of bearings the track on the outer race is ground spherical and its this feature which gives these bearings the property of self alignment. Due to the character of self alignment these bearings are not affected by the shaft deflection and mounting errors and a shaft deflection up to 4o is automatically adjusted without damaging the bearings. These bearings are chiefly designed for carrying radial loads but at the same time they are capable to carry small thrust load in both directions. Load carrying capacity of these bearings are slightly less than that of a single row deep groove ball bearings of same dimensions.

Cylindrical Roller Bearings:
In this type of bearings, the rollers race tracks are essentially cylindrical, however they may be ground slightly curved in order to achieve thereby small degree of flexibility. The rollers are guided between two lips on either the inner race or the outer race. Other types provided with either no lip, one lip or two lips, according to the function which the bearing has to perform. Ball Bearings have a point contact on the races whereas all types of cylindrical roller bearings have a line contact. Due to line contact the cylindrical roller bearings have a very high radial load carrying capacity as compared to ball bearings of the same size. Due to their separable design, cylindrical roller bearings are more convenient for mountings than ball bearings.

Self Aligning Spherical Roller Bearings:
This type of bearing consists of spherical outer race and inner race with two tracks, a cage, and a complement of spherical shaped rollers. Just like double row self aligning ball bearings too are not sensitive to misalignment and they can adjust themselves to shaft deflections. Due to the principle, sizes and shaft of rollers and accuracy with which they are guided these bearings have un axial capacity. The design of this bearing permits radial load and heavy thrust load in either direction.

Taper Roller Bearings:
Taper roller bearings consists of two main units, a cup and a cone. The cup is on the outer race whereas the cone consists of inner race, the separator and compliment of taper rollers. The taper rollers are guided by the high load on the inner race. The taper roller bearings are manufactured with interchangeable cups and cone on the shaft separately. These bearings are capable of carrying both the radial and axial loads and permit fine adjustment for end play. Greater care is required to ensure the proper alignment of bearings and maintenance of proper axial clearance is essential to avoid bearing failure. Due to more development in the design of the taper roller bearings, these are also available with 2 rows and 4 rows.

Needle Roller Bearings:
Needle roller bearings comprise of special form of cylindrical roller bearings in which the rollers are of a very small diameter and comparatively long therefore they have the advantage of a very small difference bet These bearings are detachable and suitable for carrying only radial loads. Various designs of needle roller bearings are available and depending upon the designs of the bearing assembly. Needle roller bearings may be used either without an inner race or outer race or even without any races merely using a set of needle rollers. In all these cases the shaft or the housing should be strictly of the same qualities as of the bearings races( Hardness, Accuracy and finish); Needle roller bearings are found applicable where space is restricted and mostly where the units are oscillating.

Thrust Ball Bearings:
Thrust bearings are available mainly in two types, such as single and double thrust. Single thrust bearings consists of two rings and a set of balls in a retainer. Double thrust bearings consist of one rotating ring in the middle with two ball tracks, two sets of balls in a retainer and two stationary rings. Tracks of balls are ground in such a way that the forces between the balls and tracks are parallel to the axis of the shaft. Single thrust bearings are designed for carrying load in one direction only. Whereas double thrust can take in both directions. But these bearings can never carry any radial loads. On account of the centrifugal forces on the balls , these bearings have a limitation in the speed of outer operation.

Spherical Roller Thrust Bearings:
This type of bearing is characterized by its high axial load carrying capacity. It can also absorb considerable radial loads because the direction of contact is inclined to the axis of the shaft. The track of the housing washer is spherical, and the rolling bodies are barrel shaped. This makes the bearing self-aligning and therefore insensitive to misalignment.

Power Transmission Unit:
This unit consists of bearing with pillow block. The bearing is having self color for the grip which cannot loosen and the spherical outer race provides self- alignment in any direction. The pillow block is having oil hole on the top for re-lubrification and bolt hole at the base to fix standard bolt. Complete Unit can attach with machinery frames on a straight shaft with slip fit. The pre lubricated bearings with the felt seals enable the unit to install even in dusty environment.

Shafer Bearings for Fertilizers and Chemical Unit:
Shafer bearing in a block is a special unit consisting of double row taper bearing with concave rollers. This is designed for heavy thrust as well as radial loads with with shocks. The micro lock washer on an extended inner ring provides fast adjoinment and resists vibration. Due to special "Z" Housing seals dirt stays out and grease stays in even under severest conditions.

Single Row Radial Wide Type Bearings:
Wide type bearings are similar to single row deep groove ball bearings, having standard bore and outside diameter, but thickness is same as double row bearings of corresponding sizes in inch dimensions. Extra thickness in this bearing provides layer support area for shaft and housing contact and also space for pre packed lubricant which has sufficient place for grease expansion under agitation. Due to wide play seal these bearings are suitable for electric motors where it simplifies housing design. Bearings are also available in mechanic seals.

Plastic Bearings
Plastic Bearings are Lightweight, Low Friction, Lube Free, and Can be Run In Liquids. Bearing Rings Can Be Molded To Integrate With Customer Applications. Specials Made In Low/High Quantities. Services Include Prototyping, Pilot Runs & Custom Designs. Many different types of plastics have properties which make them suitable for bearing applications, the most commonly used are phenolics, acetals, UHMWPE, and nylon. The major limitations involved in the use of plastics have to do with high temperatures and possible cold flow under heavy loads.