Catalog Searcher
Categories

High-Temperature Ball Bearing Unit, Square Flange Housing, Inch Series (VA201/VA228)

FY TF / YAR 204-212-2F / SKF (Official website) / Listed on page 32 of the document

Inch-series square flange ball bearing unit for use in high-temperature environments. Available in two heat-resistant specifications, VA201 (130 to 250°C) and VA228 (260 to 350°C), and requires no relubrication.

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

High-Temperature Ball Bearing Unit, Square Flange Housing, Inch Series (VA201/VA228) on page 32 of SKF "SKF高温用軸受 最高運転温度350 °C(660 °F)"
Source: SKF「SKF高温用軸受 最高運転温度350 °C(660 °F)」page 32
A reduced image of the relevant page is quoted from the document. Copyright belongs to SKF.Request removal

Specifications

Shaft diameter d 3/4 to 2 7/16 in
Limit temperature 130 °C
Permissible rotational speed 480 r/min

How to choose Bearing units

Points to check when selecting, with the values for this product (High-Temperature Ball Bearing Unit, Square Flange Housing, Inch Series (VA201/VA228)).

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

    This product: Shaft diameter d 3/4 to 2 7/16 in

    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

    This product: Limit temperature 130 °C

    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

    This product: Permissible rotational speed 480 r/min

    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

Square flange housed ball bearing unit for shaft diameters of 3/4 to 2 7/16 inches (19.05 to 61.913 mm). The VA201 specification can be used up to a limit temperature of 250°F (approx. 130°C), and the VA228 specification can be used at 350°F (approx. 260°C) or higher. The VA201 requires a break-in run.

Features

  • No relubrication required
  • Two heat-resistant specifications: VA201 and VA228
  • Inch-series ISO dimensions

FAQ

Q. In which temperature ranges can the VA201 and VA228 heat-resistant specifications each be used?
A. The VA201 specification can be used in environments of 130 to 250°C, and the VA228 specification can be used in environments of 260 to 350°C. The upper service limit of the VA201 specification is 250°F (approx. 130°C), and that of the VA228 specification is 350°F (approx. 260°C) or higher.
Q. What shaft diameter range does the FY TF / YAR 204-212-2F support?
A. It supports shaft diameters of 3/4 to 2 7/16 inches (19.05 to 61.913 mm).
Q. Does the FY TF / YAR 204-212-2F require relubrication, and does the VA201 specification require anything before operation?
A. No relubrication is required. The VA201 specification requires a break-in run.

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

Source documents

Similar products (other manufacturers)

Bearing units products, ordered by similarity of specifications and applications.

More products from SKF

See all →