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Stainless Steel Rhombus Flange Type Ball Bearing Unit F-UCFM2 Series

F-UCFM2 / NSK (Official website)

Stainless steel rhombus flange unit. Mold oil sealed, requires no lubrication, and offers excellent corrosion resistance. Accommodates shaft diameters of 20 to 50 mm.

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

Specifications

Shaft diameter d 20〜50 mm
Housing material Austenitic stainless steel casting (SCS13)
Mounting bolt size M10 to M16
Recommended tightening torque for set screw 3.9 to 7.8 N·m
Operating temperature range -15 to +80 (continuous operation at +60 or below) ℃
dn Value Upper Limit 12×10^4
Mass 0.5 to 4.9 kg

How to choose Bearing units

Points to check when selecting, with the values for this product (Stainless Steel Rhombus Flange Type Ball Bearing Unit F-UCFM2 Series).

  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

    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

    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

The housing is made of stainless steel casting (SCS13) and has a two-bolt rhombus flange shape. The built-in bearing is lubricated with mold oil and requires no oil replenishment. Operating temperature and permissible speed are common with the pillow block type, and the recommended tightening torque for the set screws is also specified.

Features

  • Excellent corrosion resistance
  • Long lubrication life due to mold oil
  • Suppresses oil leakage and contamination from the surroundings
  • Low bearing torque
  • Interchangeable with other companies' ISO standard units

Applications

  • Food processing machinery
  • Packaging machinery
  • Chemical processing machinery
  • Equipment requiring a clean working environment

FAQ

Q. What applications and environments is the F-UCFM2 Series suited for?
A. It is used in food processing machinery, packaging machinery, chemical processing machinery, and equipment requiring a clean working environment. The housing is made of austenitic stainless steel casting (SCS13) and offers excellent corrosion resistance.
Q. What shaft diameters and mounting bolt sizes does the F-UCFM2 Series accommodate?
A. It accommodates shaft diameters d of 20 to 50 mm. The mounting bolt size is M10 to M16.
Q. What is the operating temperature range and the upper limit of the dn value for the F-UCFM2 Series?
A. The operating temperature range is -15 to +80 ℃, and continuous operation is at +60 ℃ or below. The upper limit of the dn value is 12×10^4.
Q. Does the F-UCFM2 Series require lubrication?
A. The built-in bearing is lubricated with mold oil, and no oil replenishment is required. Mold oil provides a long lubrication life and also suppresses oil leakage and contamination from the surroundings.
Q. What are the recommended tightening torque for the set screws and the mass of the F-UCFM2 Series?
A. The recommended tightening torque for the set screws is 3.9 to 7.8 N·m. The mass is 0.5 to 4.9 kg.

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

Source documents

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