Catalog Searcher
Categories

Single-Row Cylindrical Roller Bearing

単列円筒ころ軸受（NU形・NJ形・NUP形・N形・NF形） / JTEKT Corporation (Official website) / Listed on page 72 of the document

Single-row cylindrical roller bearing with bore diameter 100 to 850 mm. High radial load capacity, suitable for heavy and shock loads.

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

Single-Row Cylindrical Roller Bearing on page 72 of JTEKT Corporation "JTEKT 大形転がり軸受カタログ（技術解説・軸受寸法表）"
Source: JTEKT Corporation「JTEKT 大形転がり軸受カタログ（技術解説・軸受寸法表）」page 72
A reduced image of the relevant page is quoted from the document. Copyright belongs to JTEKT Corporation.Request removal

Specifications

Inner diameter d 100～850 mm
Outer diameter D 150～1120 mm
Width B 24～150 mm

How to choose Cylindrical Roller Bearings

Points to check when selecting, with the values for this product (Single-Row Cylindrical Roller Bearing).

  1. 1. Boundary dimensions that fit the shaft and housing

    This product: Inner diameter d 100～850 mm

    Select the bore diameter d to match the shaft diameter and the outside diameter D to match the housing bore, and determine the width B from the available installation space. Even with the same bore, there are dimension series with different outside diameters and widths, and wide-section types and types with thicker outer ring walls also exist. Confirm the boundary dimensions d×D×B combination against the bearing number.

  2. 2. Select a rated load that suits the load conditions

    The basic dynamic load rating Cr is the basis for life calculation; calculate whether the required life is met from the actual load and rotational speed. For large loads at standstill or low speed, or for shock loads, also check the basic static load rating C0r. Wide-section, double-row and full-complement types are options when greater load capacity is needed.

  3. 3. Determine the type for fixed and free positions

    NU and N types allow relative axial movement between the inner and outer rings, making them suitable for the free side that absorbs thermal expansion of the shaft. If axial load is applied, choose NJ or NF types for one direction, or NUP types for both directions. First determine which bearing in the overall bearing arrangement locates the shaft axially.

  4. 4. Select a clearance that suits fit and temperature

    Internal clearance is available in classes such as C2, CN and C3. Consider a larger clearance class where an interference fit or a temperature difference between inner and outer rings reduces the clearance during operation. Tapered bore double-row types allow clearance adjustment by the amount of push-in and are used in applications with strict clearance control, such as machine tool spindles.

  5. 5. Match rotational speed with cage and accuracy grade

    For high-speed rotation, check the permissible rotational speed as well as the cage material (brass, steel sheet or resin) and the accuracy class. Full-complement types without cage have high load capacity but are unsuitable for high speed. Hybrid types with silicon nitride rollers offer low friction and support high-speed rotation.

  6. 6. Check electrical erosion countermeasures and maintainability

    In inverter-driven motors and generators, current can flow through the bearing causing electrical erosion, so consider insulated-coated or ceramic-roller types. For outdoor use or locations that are difficult to lubricate, also check for sealed, grease-packed designs, rust-preventive treatment, and ease of disassembly and inspection.

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

About Cylindrical Roller Bearings and all products

Description

Single-row cylindrical roller bearing with bore diameter 100 to 850 mm. NU and N types allow axial displacement and are suitable for the free-side bearing. NJ and NF types and NUP type can accommodate a certain axial load.

Features

  • Line contact between rollers and raceways provides high radial load capacity
  • NU and N types allow axial displacement
  • NJ and NF types accept axial load in one direction; NUP type accepts axial load in both directions
  • Easy to machine with high precision, suitable for high-speed rotation

Applications

  • Applications subject to heavy and shock loads
  • Free-side bearing

FAQ

Q. What are the ranges of bore diameter, outer diameter, and width for single-row cylindrical roller bearings (NU, NJ, NUP, N, and NF types)?
A. Bore diameter d is 100 to 850 mm, outer diameter D is 150 to 1120 mm, and width B is 24 to 150 mm.
Q. How does axial handling differ between NU and N types versus NJ, NF, and NUP types of single-row cylindrical roller bearings?
A. NU and N types allow axial displacement and are suitable for the free-side bearing. NJ and NF types accept axial load in one direction, and NUP type accepts axial load in both directions.
Q. What loads and applications are single-row cylindrical roller bearings suited for?
A. They are suitable for high radial loads and heavy or shock loads. Line contact between rollers and raceways provides high radial load capacity.
Q. Can single-row cylindrical roller bearings be used in high-speed rotation applications?
A. Yes. They are easy to machine with high precision and are suitable for high-speed rotation.

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

Source documents

Similar products (other manufacturers)

Cylindrical Roller Bearings products, ordered by similarity of specifications and applications.

More products from JTEKT Corporation

See all →