A ball bearing is a type of rolling-element bearing which uses balls to maintain the separation between the moving parts of the bearing.

The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads. It achieves this by using at least two races to contain the balls and transmit the loads through the balls. Usually one of the races is held fixed. As one of the bearing races rotates it causes the balls to rotate as well. Because the balls are rolling they have a much lower coefficient of friction than if two flat surfaces were rotating on each other.

Miniature ball bearings have become essential components in the rotating elements of various equipments and machines. In response to the trend toward equipment and machinery that gets smaller, more compact, thinner and quieter, we manufacture hundreds of kinds of miniature ball bearings, including specialized types, from extremely small bearings with a 1.0 mm bore diameter and a 3.0 mm outer diameter to bearings that are about 20 mm in outer diameter.

These are also available in inch Dimension. The most commonly used sealed and shielded bearings are usually given an extra 1 to 2 mm in width in order to accommodate the shield plate, and to allow sealing in of the grease.

An angular contact ball bearing uses axially asymmetric races. An axial load passes in a straight line through the bearing, whereas a radial load takes an oblique path that tends to want to separate the races axially. So the angle of contact on the inner race is the same as that on the outer race. Angular contact bearings better support "combined loads" (loading in both the radial and axial directions) and the contact angle of the bearing should be matched to the relative proportions of each. The larger the contact angle (typically in the range 10 to 45 degrees), the higher the axial load supported, but the lower the radial load. In high speed applications, such as turbines, jet engines, dentistry equipment, the centrifugal forces generated by the balls will change the contact angle at the inner and outer race. Ceramics such as silicon nitride are now regularly used in such applications due to its low density (40% of steel - and so

significantly reduced centrifugal force), its ability to function in high temperature environments, and the fact that it tends to wear in a similar way to bearing steel (rather than cracking or shattering like glass or porcelain).

Most bicycles use angular-contact bearings in the headsets because the forces on these bearings are in both the radial and axial direction .

Taper roller bearings use conical rollers that run on conical races. Most roller bearings only take radial loads, but tapered roller bearings support both radial and axial loads, and generally can carry higher loads than ball bearings due to greater contact area. Taper roller bearings are used, for example, as the wheel bearings of most cars, trucks, buses, and so on. The downsides to this bearing is that due to manufacturing complexities, tapered roller bearings are usually more expensive than ball bearings; and additionally under heavy loads the tapered roller is like a wedge and bearing loads tend to try to eject the roller; the force from the collar which keeps the roller in the bearing adds to bearing friction compared to ball bearings.

Tapered Roller Bearings consist of two main units. A cup and a cone. The cup is on the

outer race whereas the cone consists of the inner race. The tapered rollers are guided by the high load on the inner race.

These bearings are capable of carrying both the radial and axial loads and permit fine adjustment for end play.

J. K. Bearing store stocks many types and sizes of cylindrical roller bearings, the majority being single row bearings with cage & also with a full complement of rollers. The J. K. Bearing also provides precision single and double row cylindrical roller bearings for machine tool applications and double cylindrical roller bearings for rolling mill and other heavy engineering applications as per the customer requirements.

All J. K. Bearing cylindrical roller bearings represent the latest state of the art Bearings. The contact geometry between roller and raceway has been much improved by the introduction of the "logarithmic" profile, which provides for optimum stress distribution in the bearing. Optimized surface finishes favors lubricant film formation and the correct rolling motion of the cylindrical rollers. These improvements have considerably increased the performance of Bearings.

The rollers of single row cylindrical roller bearings with cage are guided between integral flanges on one the bearing rings. The bearing rings with integral flanges and the roller and cage assembly can be withdrawn from the other ring. This facilitates mounting and dismounting particularly where both rings have to have interference fits because of the load conditions.

Spherical roller bearings use rollers that are thicker in the middle and thinner at the ends; the race is shaped to match. Spherical roller bearings can thus adjust to support misaligned loads. However, spherical rollers are difficult to produce and thus expensive, and the bearings have higher friction than a comparable ball bearing since different parts of the spherical rollers run at different speeds on the rounded race and thus there are opposing forces along the bearing/race contact.

Self aligning Spherical Roller Bearing consists of a 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 these bearings too are not sensitive to

misalignment and it can adjust itself to shaft deflections.

The design of this bearing permits radial load and heavy thrust load in either direction.

Needle bearings feature a smaller cross-section, higher load-carrying capacity, greater rigidity, and lower inertia forces that facilitate size and weight reductions in machinery. They're designed to withstand oscillation, perform under severe conditions, and interchange with sliding bearings.

Diverse types of needle bearings are available in a wide variety of sizes and tolerances, for a multitude of applications.

Needle roller and cage assemblies are offered in single or double row, solid or split cage, metric and inch sizes; as well as in connecting rod bearings for special applications.

Single and double row bearings are available with or without ribs, and with or without inner rings.

Thrust bearings are offered in single row roller and cage assemblies.

Yoke and stud type track rollers are also available.

Pillow blocks are advanced applied in places with simple equipment and spare parts, such as agricultural machines, convey system or construction machines. One unit of pillow block consists of a deep groove ball bearings with a spherical outer rings closed in double sides and a housing made by gray cast iron or punches steel.

A pillow block bearing (plummer block) is a mounted bearing used to provide support for a rotating shaft with the mounting surface on a parallel line with the axis of the shaft.

Pillow block bearings are generally self-lubricating. Pillow block bearings are a form of mounted bearing used to provide load support for a rotating shaft axis. The bearing housing mounts to a surface parallel to the shaft axis. Selection of the appropriate

bearings can be accomplished based on the shaft size and the radial and thrust load requirements. Pillow block bearings are designed to support a shaft: the mounting surface is on a parallel line with the axis of the shaft. Elongated bolt holes in the base or feet of the unit allow for some adjustment and easy mounting of the pillow block bearing.

Linear Motion Bearings consists of an outer cylinder, ball retainer, balls and two end rings. It has high precision and rigidity, ease of assembly and ease of replacement.

Linear motion bearings are able to simultaneously bear loads and direct linear motion. There are four main categories of linear motion bearings: sliding contact linear motion bearings, rolling element linear motion bearings, hydrostatic or aerostatic linear motion bearings and magnetic linear motion bearings.

A ball bearing is a type of rolling-element bearing which uses balls to maintain the separation between the moving parts of the bearing.

The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads. It achieves this by using at least two races to contain the balls and transmit the loads through the balls. Usually one of the races is held fixed. As one of the bearing races rotates it causes the balls to rotate as well. Because the balls are rolling they have a much lower coefficient of friction than if two flat surfaces were rotating on each other.

Miniature ball bearings have become essential components in the rotating elements of various equipments and machines. In response to the trend toward equipment and machinery that gets smaller, more compact, thinner and quieter, we manufacture hundreds of kinds of miniature ball bearings, including specialized types, from extremely small bearings with a 1.0 mm bore diameter and a 3.0 mm outer diameter to bearings that are about 20 mm in outer diameter.

These are also available in inch Dimension. The most commonly used sealed and shielded bearings are usually given an extra 1 to 2 mm in width in order to accommodate the shield plate, and to allow sealing in of the grease.

An angular contact ball bearing uses axially asymmetric races. An axial load passes in a straight line through the bearing, whereas a radial load takes an oblique path that tends to want to separate the races axially. So the angle of contact on the inner race is the same as that on the outer race. Angular contact bearings better support "combined loads" (loading in both the radial and axial directions) and the contact angle of the bearing should be matched to the relative proportions of each. The larger the contact angle (typically in the range 10 to 45 degrees), the higher the axial load supported, but the lower the radial load. In high speed applications, such as turbines, jet engines, dentistry equipment, the centrifugal forces generated by the balls will change the contact angle at the inner and outer race. Ceramics such as silicon nitride are now regularly used in such applications due to its low density (40% of steel - and so

significantly reduced centrifugal force), its ability to function in high temperature environments, and the fact that it tends to wear in a similar way to bearing steel (rather than cracking or shattering like glass or porcelain).

Most bicycles use angular-contact bearings in the headsets because the forces on these bearings are in both the radial and axial direction .

Taper roller bearings use conical rollers that run on conical races. Most roller bearings only take radial loads, but tapered roller bearings support both radial and axial loads, and generally can carry higher loads than ball bearings due to greater contact area. Taper roller bearings are used, for example, as the wheel bearings of most cars, trucks, buses, and so on. The downsides to this bearing is that due to manufacturing complexities, tapered roller bearings are usually more expensive than ball bearings; and additionally under heavy loads the tapered roller is like a wedge and bearing loads tend to try to eject the roller; the force from the collar which keeps the roller in the bearing adds to bearing friction compared to ball bearings.

Tapered Roller Bearings consist of two main units. A cup and a cone. The cup is on the

outer race whereas the cone consists of the inner race. The tapered rollers are guided by the high load on the inner race.

These bearings are capable of carrying both the radial and axial loads and permit fine adjustment for end play.

J. K. Bearing store stocks many types and sizes of cylindrical roller bearings, the majority being single row bearings with cage & also with a full complement of rollers. The J. K. Bearing also provides precision single and double row cylindrical roller bearings for machine tool applications and double cylindrical roller bearings for rolling mill and other heavy engineering applications as per the customer requirements.

All J. K. Bearing cylindrical roller bearings represent the latest state of the art Bearings. The contact geometry between roller and raceway has been much improved by the introduction of the "logarithmic" profile, which provides for optimum stress distribution in the bearing. Optimized surface finishes favors lubricant film formation and the correct rolling motion of the cylindrical rollers. These improvements have considerably increased the performance of Bearings.

The rollers of single row cylindrical roller bearings with cage are guided between integral flanges on one the bearing rings. The bearing rings with integral flanges and the roller and cage assembly can be withdrawn from the other ring. This facilitates mounting and dismounting particularly where both rings have to have interference fits because of the load conditions.

Spherical roller bearings use rollers that are thicker in the middle and thinner at the ends; the race is shaped to match. Spherical roller bearings can thus adjust to support misaligned loads. However, spherical rollers are difficult to produce and thus expensive, and the bearings have higher friction than a comparable ball bearing since different parts of the spherical rollers run at different speeds on the rounded race and thus there are opposing forces along the bearing/race contact.

Self aligning Spherical Roller Bearing consists of a 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 these bearings too are not sensitive to

misalignment and it can adjust itself to shaft deflections.

The design of this bearing permits radial load and heavy thrust load in either direction.

Needle bearings feature a smaller cross-section, higher load-carrying capacity, greater rigidity, and lower inertia forces that facilitate size and weight reductions in machinery. They're designed to withstand oscillation, perform under severe conditions, and interchange with sliding bearings.

Diverse types of needle bearings are available in a wide variety of sizes and tolerances, for a multitude of applications.

Needle roller and cage assemblies are offered in single or double row, solid or split cage, metric and inch sizes; as well as in connecting rod bearings for special applications.

Single and double row bearings are available with or without ribs, and with or without inner rings.

Thrust bearings are offered in single row roller and cage assemblies.

Yoke and stud type track rollers are also available.

Pillow blocks are advanced applied in places with simple equipment and spare parts, such as agricultural machines, convey system or construction machines. One unit of pillow block consists of a deep groove ball bearings with a spherical outer rings closed in double sides and a housing made by gray cast iron or punches steel.

A pillow block bearing (plummer block) is a mounted bearing used to provide support for a rotating shaft with the mounting surface on a parallel line with the axis of the shaft.

Pillow block bearings are generally self-lubricating. Pillow block bearings are a form of mounted bearing used to provide load support for a rotating shaft axis. The bearing housing mounts to a surface parallel to the shaft axis. Selection of the appropriate

bearings can be accomplished based on the shaft size and the radial and thrust load requirements. Pillow block bearings are designed to support a shaft: the mounting surface is on a parallel line with the axis of the shaft. Elongated bolt holes in the base or feet of the unit allow for some adjustment and easy mounting of the pillow block bearing.

Linear Motion Bearings consists of an outer cylinder, ball retainer, balls and two end rings. It has high precision and rigidity, ease of assembly and ease of replacement.

Linear motion bearings are able to simultaneously bear loads and direct linear motion. There are four main categories of linear motion bearings: sliding contact linear motion bearings, rolling element linear motion bearings, hydrostatic or aerostatic linear motion bearings and magnetic linear motion bearings.