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Track Rollers

A track roller is a bearing in which the thick outer ring rolls directly on a rail or cam surface. Because the outer ring itself acts as the wheel, track rollers are used in cam followers, conveyors, and rail-guided transport equipment. The main types are yoke type (support roller), which is mounted through a shaft and supported from both sides, and stud type (cam follower), which is fixed by tightening a hexagon nut onto a threaded stud. The base bearings include needle roller bearings, cylindrical roller bearings, deep groove ball bearings, and double-row angular contact ball bearings. The outer ring periphery is available in a cylindrical shape or a crowned shape that reduces edge loading, and products are generally sealed or shielded and grease-packed.

How to choose Track Rollers

  1. 1. Select a type that suits the mounting method

    Yoke types are passed over a shaft and supported on both sides, while stud types are fixed by tightening a nut on a cantilevered stud. Yoke types are available with or without a flange ring; the flangeless type requires peripheral components to restrict axial movement of the outer ring. Whether an inner ring is used depends on whether the shaft side can be induction hardened and ground to serve as the raceway.

  2. 2. Match shaft diameter with outer diameter and width

    The inner diameter d should match the shaft or stud diameter, and the outer diameter D should be determined from the contact conditions with the rail or cam and the installation space. The listed products cover outer diameters of 16 to 310 mm, inner diameters of 10 to 35 mm, and widths of 9 to 17 mm. Stud types often express their nominal size by outer diameter D, so confirm how the model number is read.

  3. 3. Judge by the outer ring allowable load

    Because the outer ring of a track roller receives the load directly and deforms by bending, the maximum dynamic radial load Fr and maximum static radial load F0r are specified separately from the bearing rated load. The applicable load is limited by the smaller of these values and the rated load, so check both.

  4. 4. Estimate life using the rated load

    The basic dynamic load rating Cr is the basis for calculating rolling fatigue life, and the basic static load rating C0r is a guide to permanent deformation under static or shock loading. The listed products have Cr values of 4.68 to 22.1 kN. Where heavy shock loads apply, consider reinforced outer ring models where the series provides them.

  5. 5. Handle axial loads with the base bearing

    Needle roller bases suit large radial loads in small diameters but are weak against axial loads. For applications where the shaft is not horizontal or is inclined, select a structure that can take axial loads, such as a flanged type or a double-row angular contact ball bearing base with a 30° contact angle.

  6. 6. Check rotational speed and lubrication method

    The limiting rotational speed of the listed products ranges widely from 300 to 12000 r/min and also varies with seal type. For long-duration operation or dusty environments, choose models that can be regreased or stud types compatible with centralized lubrication adapters to prevent early damage from grease depletion.

This guide was written by AI based on the listed products' documents and specification items. Check each manufacturer's documents before adopting.