Ultra-High/Low Temperature Y-Bearing (Metric Shaft)

Specifications

How to choose Bearing units

Points to check when selecting, with the values for this product (Ultra-High/Low Temperature Y-Bearing (Metric Shaft)).

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

   This product: Shaft diameter d 20 to 80 mm

   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

Y-bearing equipped with either a steel pressed cage or a graphite coronet cage. Shaft diameter 20 to 80 mm, outside diameter 47 to 140 mm.

FAQ

Q. What are the shaft diameter and outside diameter ranges for YAR 2xx-2FW/VA201・VA228?

A. Shaft diameter d is 20 to 80 mm, and outside diameter D is 47 to 140 mm.

Q. What types of cages are available for YAR 2xx-2FW/VA201・VA228?

A. It is equipped with either a steel pressed cage or a graphite coronet cage. You can choose between a steel pressed cage and a graphite cage.

Q. What machinery is the Ultra-High/Low Temperature Y-Bearing (Metric Shaft) used in?

A. It is used in machinery in high-temperature environments and machinery in low-temperature environments.

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

Source documents

• Catalog SKF 転がり軸受カタログ 15 エンジニアリング製品 15A センサー軸受ユニット 120 pages Open page 35
  Found on: https://azuma-eg.com/catalogue/