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Smith Bearings


THE SMITH ANTI-FRICTION CAM FOLLOWER ROLLER BEARING was developed for use in cam or track roller applications. It is a full complement (non-caged) roller bearing with a thick outer race. This design permits a heavy load rating in a small package, and allows for a non-supported and line loaded outer race. It is a precision low-cost unit which is easily mounted and ideally suited for varied applications.

In addition to standard models, special bearings are manufactured to customer specification to meet unique applications. It is often found that the use of special bearings reduces machine costs and improves performance. The economic manufacturing volumes for these bearings are surprisingly low. Please call us to discuss your special applications.


STANDARD STUD TYPE BEARINGS are recommended where loads and shock are moderate. Bearing capacity is more limited by the strength of the stud, as indicated by the rating chart depicted in this catalog.

HEAVY STUD TYPE BEARINGS are recommended for light load and shock applications; and where deflection should be held to a minimum. Rollers and outer races are identical to the standard series.

YOKE TYPE CAM FOLLOWERS are of similar internal construction except an inner race for shaft or clevis mounting replaces the threaded stud. Generally, heavier loads can be supported by the yoke mounting arrangement since stud deflection is removed from consideration as a load factor.

ECCENTRIC BEARINGS permit easy radial adjustment for precise positioning which may make installation less expensive. The eccentric construction accommodates for wear that may be caused in the application. A lock nut should be employed to secure the bearing in position, when practical.

CROWNED BEARINGS are recommended where the track or cam may cause excessive angular loading. This construction can reduce the possibility of edge loading of rollers. Thrust on the rollers is minimized and reliability is improved.

HEX SOCKET TYPE BEARINGS are favorable for most applications where the bearing is installed in a blind or threaded hole. This allows for easier and more secure installation and removal.

SCREWDRIVER SLOT TYPE BEARINGS are available in standard stud and heavy stud type bearings. This means of tightening will be supplied unless the hex socket type is requested. They are recommended for economy.

SEALED CAM FOLLOWERS are furnished with molded acetal full contact seals contained within the outer race undercuts at both ends of the bearing. This is a low friction material which keeps drag to a minimum yet is stable and unaffected by corrosive agents or lubricants. The seals provide both an effective means of protection from contaminants and ensure lubricant retention. They are designed with a small vent to allow for purging during relubrication without causing seal displacement.

The outer race on sealed cam followers is provided with a machined groove in the bore which acts as a grease reservoir and extends the period between relubrications. All sealed bearings are dimensionally interchangeable with the unsealed configuration of the same series.

Typical Seal Configuration



Most standard bearings listed in this catalog are stocked at the factory or available from your local ABC, Smith Cam Follower distributor. Stock conditions vary depending upon bearing size and current demand. Eccentric, Crowned and larger size bearings are not stocked in depth.


Cam follower materials and finishes are selected to provide a minimum of friction and to assure dependable performance for the required service life.

Outer Race -- High-carbon chrome bearing steel, through-hardened and ground.

Inner Race -- Low-carbon alloy steel, carburized, and deferentially hardened. A special heat treating process is used whereby progressive differential hardness provides maximum strength in the critically loaded raceway area. The threaded end is maintained in a softer condition, therefore, providing the best characteristics of a strong bolt which is subject to tensile, shear and bending stresses. The race and stem are centerless ground.

Needle Rollers -- High-carbon chrome bearing steel, through-hardened ground and lapped.

Retaining Washers -- Low-carbon alloy steel, case-hardened and ground.


Proper cam follower mounting requires a snug fit between the stud and housing bore. Where feasible, the recommended bore sized shown in the dimensional tables should be followed. An arbor press is the preferred means of stud installation with pressure applied to the central area, not to the outer flange edges.

In positioning the cam follower, the end washer should be firmly backed up by a flat housing shoulder or surface of the machine member which is square with the center line of the stud. The shoulder should be at least as large as the minimum boss diameter given in the tables. It is also important that alignment be maintained between the bearing axis and the cam or track surface to prevent edge loading of the bearing outer race. The dimensional tables list the recommended torque to be applied to the nut. Excessive torque, in particular with smaller sizes, may damage the internal elements. If the threads or nut are lubricated, the torque value should be reduced by one half.

Typical Stud Type Mounting



The mounting of cam yoke rollers should provide for endwise clamping to prevent axial movement and displacement of the end washer. The washer should be firmly backed up by a flat housing shoulder which is square with the centerline of the bearing. The shoulder should be at least as large as the minimum clamping diameter shown in the tables to provide adequate washer support.

The recommended shaft diameters listed in the dimensional tables provide for either a slip or press fit. In heavily loaded applications, the shaft should be heat treated and press fit in the bearing bore. With moderate loads, a hardened shaft should be used but a slip fit is sufficient. In lightly loaded applications, a slip or push fit may be used with an unhardened shaft.

Typical Yoke Roller Mounting





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