Support Roller without Flange

Specifications

つば輪なしサポートローラー model comparison

Compare 3 models in the same series by specification.

How to choose Track Rollers

Points to check when selecting, with the values for this product (Support Roller without Flange).

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

   This product: Type STO, RSTO, NA 22…2RS, RNA 22…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

   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

For applications where axial movement of the outer ring is restricted by related components. The width of the inner ring of the type with inner ring is slightly wider than the outer ring. STO/RSTO type is open type only; NA/RNA 22…2RS type has NBR contact seals.

FAQ

Q. What is the difference in sealing between the STO/RSTO type and the NA/RNA 22…2RS type of the Support Roller without Flange?

A. The STO/RSTO type is open type only. The NA/RNA 22…2RS type has NBR contact seals and is grease-filled.

Q. How should I choose between the with-inner-ring and without-inner-ring types of the Support Roller without Flange?

A. You can choose between with and without inner ring. The width of the inner ring of the type with inner ring is slightly wider than the outer ring. Restrict the axial movement of the outer ring with related components.

Q. What applications is the Support Roller without Flange used for?

A. It is used in applications such as bearing assemblies, cam drive units, and conveyor systems. It is intended for applications where axial movement of the outer ring is restricted by related components.

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 4
  Found on: https://azuma-eg.com/catalogue/