UKFE type (Flange unit, tapered bore with adapter)

Specifications

How to choose Bearing units

Points to check when selecting, with the values for this product (UKFE type (Flange unit, tapered bore with adapter)).

1. 1. Select the bore to suit the shaft diameter

   This product: Shaft diameter d 20～55 mm

   Units are designated by applicable shaft diameter, with metric and inch systems mixed. Confirm the shaft dimension system and select the corresponding diameter. Set-screw and collar types with cylindrical bores can be used with loose shaft tolerances, but if a recommended shaft tolerance is specified, follow it.

2. 2. Verify life using the dynamic load rating

   This product: Basic dynamic load rating Cr 14.0～52.5 kN

   The basic dynamic load rating Cr is the reference value for life calculation. Calculate the required life from the radial and axial loads acting on the shaft and the rotational speed, and select a size with a sufficient Cr margin. Even at the same shaft diameter, the value differs depending on the bearing series.

3. 3. Check static and shock loads against C0r

   This product: Basic static load rating C0r 7.85～36.0 kN

   For applications involving high loads or shocks during low-speed rotation, oscillation, or while stopped, check the load ratio against the basic static load rating C0r. In heavy-duty equipment such as levelers, the static rating margin as well as the dynamic rating is a factor in selection.

4. 4. Choose the shaft fixing method by application

   Set-screw types are easy to install and suit general applications, eccentric locking collar types suit applications with a constant direction of rotation, and tapered bore with adapter types provide reliable shaft clamping and suit vibration or high speed. For set-screw types, fixing at the specified tightening torque is the key to preventing loosening.

5. 5. Confirm rotational speed and temperature conditions

   The permissible rotational speed varies with the fixing method and seal type. In high-temperature environments, check the limiting temperature as well as the usable temperature of the seal material and sealed grease. For high temperature and high speed, selecting a re-greasable grease-lubricated type makes maintenance easier.

6. 6. Permissible installation angle and misalignment

   Insert bearings with a spherical outside diameter can absorb shaft inclination caused by installation errors. Check the permissible misalignment value and confirm that frame accuracy and shaft deflection fall within that range. When re-greasing, note that the permissible angle becomes smaller.

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

About Bearing units and all products

Description

Flange housing made of ductile cast iron. It is fixed to the shaft using an adapter in the tapered bore.

FAQ

Q. What is the applicable shaft diameter range for the UKFE type (flange unit with tapered bore and adapter fixing)?

A. The shaft diameter d is 20 to 55 mm.

Q. What are the material and mounting method of the UKFE type (flange unit with tapered bore and adapter fixing)?

A. It has a flange housing made of ductile cast iron and is fixed to the shaft using an adapter in the tapered bore.

Q. What are the approximate basic dynamic load rating, basic static load rating, and mass of the UKFE type (flange unit with tapered bore and adapter fixing)?

A. The basic dynamic load rating Cr is 14.0 to 52.5 kN, the basic static load rating C0r is 7.85 to 36.0 kN, and the mass is 0.5 to 3.5 kg.

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

Source documents

• Catalog Ball Bearing Units with Ductile Cast Iron Housing 11 pages Open page 7
  Found on: https://www.nsk.com/products/bearing-units/