Cam Follower

Specifications

How to choose Track Rollers

Points to check when selecting, with the values for this product (Cam Follower).

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

   This product: Type KR, NUKR .. A, PWKR ...2RS

   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

   This product: Outer diameter D 16 to 90 mm

   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.

About Track Rollers and all products

Description

Instead of an inner ring, it has a solid threaded stud, allowing quick mounting with a hexagon nut. The KR type uses needle rollers, while the NUKR .. A and PWKR ...2RS types are based on full-complement cylindrical roller bearings. All types can be selected with an eccentric collar. Dimensions range from 16 to 90, with accessories (grease fitting, hexagon nut, plug, adapter) available.

FAQ

Q. How are KR, NUKR, and PWKR type cam followers mounted to machine parts?

A. They have a solid threaded stud and are mounted to machine parts with a hexagon nut. The stud mounting allows easy fixing.

Q. What outer diameter D range can be selected for cam followers?

A. The outer diameter D is 16 to 90 mm. Dimensions are expressed by outer diameter D.

Q. How do the rolling elements and bearing base differ between the KR type and the NUKR .. A and PWKR ...2RS types?

A. The KR type uses needle rollers. The NUKR .. A and PWKR ...2RS types are based on full-complement cylindrical roller bearings.

Q. Where in the model number should I look to select a cam follower with an eccentric collar?

A. An eccentric collar can be selected. The suffix E indicates an eccentric collar. The PPA/PPSKA suffix indicates an axial slide ring included.

Q. What lubrication method can be used for cam followers of size 35 and above?

A. Sizes 35 and above are compatible with centralized lubrication adapters. In the range of sizes 16 to 90, accessories including grease fitting, hexagon nut, plug, and adapter are available.

Written by AI based on the content of the source documents.

Source documents

• Catalog SKF トラックランナー軸受 (14 トラックランナー軸受) 50 pages Open page 8
  Found on: https://azuma-eg.com/catalogue/