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Y-Bearing with Set Screw Threaded Hole Specifications

YAT 2 / YAR 2 / YARAG 2 / SKF (Official website)

Table of inner ring threaded hole nominal dimensions and thread standards by bearing size for set screw type Y-bearings.

Last verified: (date the content was verified against the source document)

Specifications

Compatible Bearing Dimensions 03~20

How to choose Bearing units

Points to check when selecting, with the values for this product (Y-Bearing with Set Screw Threaded Hole Specifications).

  1. 1. Match shaft diameter and dimensional system (metric/inch)

    Bearing units are offered in separate metric and inch series, and they are not interchangeable even when their appearance is similar. Listed products cover metric sizes of 3 to 150 mm and inch sizes of 1 to 4 in. First determine the shaft diameter and dimensional system, then select from the corresponding series.

  2. 2. Check the rated load against the operating conditions

    The basic dynamic load rating Cr is used for rolling fatigue life calculations, and the basic static load rating C0r is used for evaluating stationary or shock loads. Listed Cr values range from 7.28 to 793 kN, and there are heavy-load products, such as half-ring types, with increased static load ratings.

  3. 3. Select a specification suited to the operating temperature

    Standard greases and rubber seals deteriorate at high temperatures. High-temperature specifications are available in types with different upper temperature limits; for example, VA201 is rated at 130 to 250°C and VA228 at 260 to 350°C. In addition to the ambient temperature, check the permissible seal temperature and the sealed grease.

  4. 4. Choose the shaft fixing method for the application

    Set-screw type is easy to install but requires control of the tightening torque. The method that fixes the bearing with a tapered bore and adapter sleeve provides a secure connection to the shaft and suits applications with reversing rotation or vibration. Check it together with the recommended shaft tolerance grade.

  5. 5. Verify the permissible rotational speed

    Bearing units have an upper limit on usable rotational speed depending on seal friction and the fixing method. The permissible speeds of listed products range widely from 6 to 12000 r/min, and low-speed heavy-load and high-speed units have very different characteristics. Confirm that the operating speed has sufficient margin.

  6. 6. Allow for shaft tilt during installation

    In the spherical-fit design, the unit can absorb shaft tilt during installation up to a certain angle. However, in structures that allow regreasing, the permissible angle may be smaller. Listed products include an example of 2°. Check the permissible misalignment according to the accuracy of the base or frame.

This guide was written by AI based on the listed products' documents and specification items.

About Bearing units and all products

Description

Specifies inner ring threaded holes (metric and inch) for bearing sizes 03 to 20. Also includes specifications for modified set screws used to absorb axial displacement in the free-side bearing.

Features

  • Metric and inch thread compatibility
  • Absorbs axial displacement of free-side bearing

Applications

  • Bearing mounting design

FAQ

Q. For set screw Y-bearings of the YAT 2 / YAR 2 / YARAG 2 series, what are the standards for inner ring threaded holes for bearing sizes 03 to 20?
A. The standards for inner ring threaded holes for bearing sizes 03 to 20 are shown in both metric and inch systems.
Q. How does the Y-Bearing with Set Screw Threaded Hole Specifications address axial displacement of the free-side bearing?
A. The specifications include modified set screws designed to absorb axial displacement in the free-side bearing.

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

Source documents

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