CSFE type (Flange unit, cylindrical bore)

Specifications

How to choose Bearing units

Points to check when selecting, with the values for this product (CSFE type (Flange unit, cylindrical bore)).

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

   This product: Shaft diameter d 20～50 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 12.8～35.0 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 6.65～23.2 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

Combines a ductile cast iron flange housing with a cylindrical bore bearing (with LLU seal).

FAQ

Q. What is the applicable shaft diameter range for the CSFE type (cylindrical bore flange unit)?

A. The shaft diameter d is 20 to 50 mm.

Q. What are the basic dynamic load rating and basic static load rating of the CSFE type (cylindrical bore flange unit)?

A. The basic dynamic load rating Cr is 12.8 to 35.0 kN, and the basic static load rating C0r is 6.65 to 23.2 kN.

Q. What are the housing material and features of the CSFE type?

A. It has a flange housing made of ductile cast iron, offering light weight and high strength. It is equipped with an LLU seal.

Q. What applications can the CSFE type be used for?

A. It can be used for shaft support in general industrial machinery.

Q. What is the mass of the CSFE type?

A. The mass is 0.3 to 1.3 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 11
  Found on: https://www.nsk.com/products/bearing-units/