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spacer Kaydon Bearings - bearing load scenarios

Radial and axial (thrust) loads
Bearings support a shaft or housing to permit their free motion about an axis of rotation. Load can be applied to bearings in either of two basic directions. Radial loads act at right angles to the shaft (bearing's axis of rotation). Axial (thrust) acts parallel to the axis of rotation. When these loads are offset from either the bearing axis (distance St) or radial plane (distance Sr), a resulting moment load (M) will be created. Kaydon Reali-Slim® bearings are available in a variety of types to handle radial loads, axial loads and moment loads.

Kaydon Bearings - radial & axial (thrust) loads

Types of Reali-Slim® bearings
Reali-Slim® bearings are available in three basic configurations: angular contact (type A), radial contact (type C), and four-point contact (type X).

By using these three types, the customer has a wider choice of mounting arrangements to meet load, stiffness and accuracy requirements in the most efficient manner.

spacer Kaydon Bearings - Type A, angular contact bearing

The type A bearing is also a conventional design. It features a circular pocket separator and a 30° contact angle along with approximately 67% of a full complement of balls.

The chief benefit of the type A bearing is that it provides greater thrust capacity than a type C or type X bearing. Because of its counterbored outer race, type A bearings have unidirectional thrust capacity. Thus, this bearing should be mounted opposed to another bearing to establish and maintain the contact angle, and to support reversing thrust loads.

	Kaydon Bearings - Type A, angular contact bearing

spacer Kaydon Bearings - Type C, radial contact bearing

The type C radial contact bearing is a single row radial ball bearing of conventional design. It is a Conrad-type assembly, which means that it is assembled by eccentric displacement of the inner race within the outer race which permits insertion of about half of a full complement of balls.

Although the type C bearing is designed primarily for radial load application, it can be configured to accept some axial (thrust) load in either direction. But, if thrust is a concern, a set of angular contact bearings should be considered for the specific application.

	Kaydon Bearings - Type C, radial contact bearing

spacer Kaydon Bearings - Type X, four-point contact bearing

Standard bearing lines are most often designed to handle either radial or axial load conditions. The unique feature about the Kaydon Reali-Slim® type X four-point contact bearing line is that the gothic arch geometry of the inner and outer races enables a single bearing to carry three types of loading (radial, axial and moment) simultaneously. This makes it the bearing of choice for many applications since a single four-point contact bearing can often replace two bearings, providing a simplified design.

Type X bearings may also be furnished with an internal diametral preload for those applications requiring greater stiffness or zero free play. This is accomplished by using balls that are larger than the space provided between the raceways. The balls and raceways, therefore, have some elastic deformation in the absence of an external load.

	Kaydon Bearings - Type X, four-point contact bearing

Note: Kaydon does not recommend the use of two type X bearings on a common shaft, as it could result in objectionable friction torque.

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Kaydon Bearings contact types

 
Type A—angular contact bearing
Type C—radial contact bearing
Type X—4-point contact bearing

 

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