Ball Bearing, Deep Groove Ball Bearing, Angular Contact Ball Bearing, Thrust Ball Bearing, Self Aligning Ball Bearing, Four Point Contact Ball Bearing

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Ball Bearing

Our range of ball bearings accommodate radial and thrust loads and are capable of operating at high speed. For these reasons and their economical price, they are most widely used bearings.

Deep Groove Ball Bearing

Deep groove ball bearings are capable of operating at high speeds and are widely used radial bearings. These non-separable bearings are available in a wide variety of seal, shield and snap-ring arrangements. It requires little attention or maintenance in service.

Physical Characteristics

• Deep groove ball bearings have deep uninterrupted raceways. This allows them to carry axial loads in both directions at reasonably high speeds.
• The bearing ring grooves are circular arcs made slightly larger than the radius of the ball.
• The balls make point contact with the raceways (elliptical contact when loaded).
• The inner ring shoulders are of equal height (as the outer ring shoulders).

Advantages of Deep Groove Ball Bearings

• Can sustain radial, axial, or composite loads.
• Can provide both high-running accuracy & high-speed operation.
• Can take the place of high speed angular contact ball bearings.
• Simple design.
• Maintenance free.
• Longer service life.

Application of Deep Groove Ball Bearings

Deep groove ball bearings are widely used, when

• Axial loads from two directions have to be transmitted, and existing space does not allow installation of matched spindle bearings.

Best possible guidance of rotating parts is required and speed is less important.

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Angular Contact Ball Bearing

We are one of the leading manufacturers and exporters of Angular Contact Ball Bearings of high quality.

Types of Angular contact ball bearings

There are three basic types of angular contact ball bearings:

• Single Row Bearings
• Double Row Bearings
• Four Point Contact Ball Bearings

1. SINGLE ROW ANGULAR CONTACT BALL BEARING

Single row angular contact ball bearings can carry thrust load in one direction only, and should always be adjusted against another bearing which accommodates the opposed thrust load. Single row angular contact ball bearings are no separable.
Spindle bearings are a special design of the single row angular contact ball bearings; they were developed primarily for high-speed work spindles of machine tools. The spindle bearings differ from the angular contact ball bearings by the contact angle, the degree of accuracy, and the type of cage. Spindle bearings are manufactured in series 70 and 72. They are identified by a bearing number commencing with a B.
There are two standard versions of single row angular contact ball bearings used for different purposes.
Only one bearing is used at a given bearing position.
Two or more bearings are positions at the given bearing position. They may be mounted adjacent, back to back or face to face position. Universal matching bearings are specially manufactured to be placed in adjacent arrangement to get a pre determined internal clearance.

2. DOUBLE ROW ANGULAR CONTACT BALL BEARING

The design of the double row angular contact ball bearing corresponds to two single row angular contact ball bearings arranged back to back. The bearing is capable of carrying high radial loads and thrust loads in both directions. It is particularly suitable for applications calling for high axial rigidity.
Double row angular contact ball bearings with unsplit rings are provided with filling slots on one side. The bearings should be mounted in such a way that the main loads are carried by the raceways without filling slot.
They are also available with shields (non-rubbing type) and seals (low friction and rubbing type) on both sides. They are filled with lithium based grease that inhibits rust and can operate from temperatures -30° C to 110° C.

Angular Contact Ball Bearings Specifications & Standards

Standard cage types:

In the following table you can find out standard cage types for angular contact ball bearings. For high speed use angular contact ball bearings, molded resin cages and machined cages are widely used.

Standard cages for angular contact ball bearings

Dimensions - The dimensions are as per the ISO recommendations

Misalignment - They are designed to adjust to limited alignment errors. Any misalignment increases the Running noise.

Tolerance - They are usually meant for normal tolerance but can be enhanced.

Internal Clearance - The internal clearance for single row angular contact ball bearing is obtained after Mounting and depends on the second bearing that provides axial location in Opposite direction.

Normal axial internal clearance is taken as standard in double row angular contact ball bearings.

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Thrust Ball Bearing

Thrust Ball Bearings carry pure thrust (axial) loads. When a load is properly applied to this bearing, the internal contact points are aligned on a plane parallel to the shaft. Radial loads dislodge the balls from their track. Thrust ball bearings can be single direction and double direction designs.

Single Direction Thrust Ball Bearings

These bearings consist of one row of balls, which rotate, between a housing washer and a shaft washer. They are separable type and can be mounted separately. Single direction thrust ball bearings, can accommodate axial loads in one direction and locate a shaft axially in one direction. They are not suitable to any radial load.

The small series are fitted with press steel cages. Bearings with machined window type cages are suffixed MP (brass) or FP (steel) suffixes M and F identify riveted brass and steel cages.

Double Direction Thrust Ball Bearings

These bearings consist of two separate rows of balls which rotate between a center shaft washer and two housing washers. This bearing should be used when a thrust load is applied from two directions. They are separable type and can be mounted separately on the shaft. They can axially locate a shaft in both directions and should not be subject to radial loads.

The thrust ball bearings have flat housing washers. They do not allow any misalignment between the shaft and the housing or angle between their support surfaces. They are manufactured to normal tolerance as standard. They are available in pressed steel and machined brass or steel cage. For satisfactory operations, they should be subject to a minimum load. If the thrust bearings work at high speeds or changes in the direction of the loads, the inertia and friction may affect the rolling. The requisite minimum axial load to be applied to thrust ball bearings can be estimated using.

The small series are fitted with press steel cages. Bearings with machined window type cages are suffixed MP (brass) or FP (steel) suffixes M and F identify riveted brass and steel cages.

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Self Aligning Ball Bearing

Are You Aware About Giant Roller Bearings?

Probably the first use of a bearing was back when the Egyptians were building the pyramids. They put round logs under the heavy stones so that they could roll them to the building site.

This method is still used today when large, very heavy objects like the Cape Hatter’s lighthouse need to be moved.

Self aligning ball bearings are suitable for applications where misalignment can arise from errors in mounting or shaft deflection. The steel balls, cage, and inner ring can rotate freely at a certain angle, as it is stated that the bearings have self-aligning features. Accordingly, misalignment of the bearing shaft due to the machining and installation of the shaft and housing will be automatically adjusted.

Self aligning ball bearing is of the double type with a spherical raceway in the outer, Self-aligning ball bearings of series 112 and 113 have an extended inner ring. They are located on the shaft by dowel pins engaging in a slot at one side of the inner ring. If a shaft is supported by pairs of self-aligning ball bearings the slot must be in opposition to each other. The bores of series 112 and 113 bearings are made to j7 limits.

Physical Characteristics

• The self-aligning ball bearing has two rows of balls.
• A common concave sphere raceway in the outer ring.
• The center of whose curvature meets that of the bearing it self, so that the inner ring, balls and cage continue to rotate.
• The self-aligning ball bearing with a tapered bore can easily be fit to the shaft with an adapter assembly.

Advantages of Self Aligning Ball Bearings

• Have the lowest friction of all rolling bearings.
• Run cooler even at high speeds.
• Easy mounting and dismounting.
• The permissible operating speed is not dependent on the common criteria like heat generation or cage stability and strength.

Application of Self Aligning Ball Bearings

• Self-aligning ball bearings are used for commercial ground shafting applications.
• Since axial load capacity is limited, self-aligning ball bearings are not suitable for applications with heavy axial loads.

Furthermore, if an adapter is used on the tapered bore of the inner diameter, installation and disassembly are much simpler and for this reason adapters are often used on equipment with drive shafts.

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Four Point Contact Ball Bearing

Four Point Contact Ball Bearings

Four point contact ball bearings are single row having raceways that enable to accommodate axial loads in both directions. They need lesser axial space and a two part inner ring. This allows large number of balls to be incorporated and carry larger loads. The bearings are separable type. They are designed to accommodate axial loads and arranged as thrust bearings with radial clearance.

Physical Characteristics

Angular contact ball bearings have raceways in the inner and outer rings that are displaced with respect to each other in the direction of the bearing axis. Following table describes the characteristics of three types of angular contact ball bearings:

Type	Characteristics
Standard Type	Available in bearing series 79, 70, 72, 72B, 73, and 73B. Contact angles: 30°and 40° (with B) available. Standard bearing cage type differs depending on bearing no.
High Speed Use	Available in bearing series 78C, 79C, 70C, 72C, and 73C. Contact angles: 15° All bearing accuracies JIS Class 5 or higher. Standard bearing cage type differs depending on bearing no.
Ultra High Speed Use	Available in bearing series HSB9C, HSB0C, BNT0, and BNT2; all boundary dimensions agree with JIS series dimensions. Contact angles: 15°; HSB type HSB9 and HSB0: 15°and 30°. All bearing accuracies JIS Class 5 or higher. BNT type internal design can be altered; suitable for higher speed applications than high speed use bearings. HSB series bearings have smaller diameter of balls than high speed use type bearings, so benefit by less torque for high precision, high speed applications. The inner ring bore diameter and outer ring inner diameter of the HSB series have a ground undercut on one side enabling easy oil flow. For even higher speed applications, there is a bearing in this series equipped with ceramic ball bearings. For standard cage types refer to Table 4; molded resin cages are also available for some varieties.

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