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Needle Roller Cage Assembly

K 系列 / SKF (Official website) / Listed on page 57 of the document

Self-contained needle roller bearing that can be fitted as is. Its small cross-section and high load capacity make it suitable for locations where radial space is limited.

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Needle Roller Cage Assembly on page 57 of SKF "針状ころ軸受 (SKF 製品カタログ・技術資料抜粋)"
Source: SKF「針状ころ軸受 (SKF 製品カタログ・技術資料抜粋)」page 57
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Specifications

Roller pitch circle diameter Fw 3〜265 mm
Basic dynamic load rating Cr 1.42〜242 kN
Basic static load rating C0r 1.02〜850 kN
Limiting speed 1500〜40000 r/min

How to choose Needle roller bearings

Points to check when selecting, with the values for this product (Needle Roller Cage Assembly).

  1. 1. Select dimensions by shaft diameter and presence of inner ring

    This product: Roller pitch circle diameter Fw 3〜265 mm

    Types without an inner ring use the shaft directly as the raceway, so the roller pitch circle diameter Fw corresponds to the applicable shaft diameter. In this case the shaft requires sufficient hardness and surface finish. If the shaft cannot serve as the raceway, select a type with an inner ring and match the shaft diameter using the bore diameter d.

  2. 2. Check housing dimensions by outside diameter and width

    The outside diameter D determines the housing bore diameter, and the width C determines the axial installation space. Shell types have thin walls and allow a smaller outside diameter, but they are retained by press fit, so the housing bore tolerance and rigidity must be verified.

  3. 3. Verify life and static strength with rated loads

    This product: Basic dynamic load rating Cr 1.42〜242 kN

    The basic dynamic load rating Cr is used for calculating rolling fatigue life, and the basic static load rating C0r is used for examining permanent deformation under shock loads or stationary loads. The listed Cr values range widely from 1.23 to 13200 kN, and are larger for double-row types and larger diameters.

  4. 4. Choose the type suited to the application

    Select shell types for space savings and solid types for high load and high rigidity. Select self-aligning types where shaft tilt is present, combined types with thrust bearings for fixed-side positions that also carry axial load, and cam followers for applications rolling along cams or rails.

  5. 5. Match rotational speed with lubrication method

    This product: Limiting speed 1500〜40000 r/min

    The limiting speed varies with the lubrication method, and generally oil lubrication allows higher speeds than grease lubrication. Confirm that the operating speed is below the limiting speed for each lubrication condition.

  6. 6. Consider sealing and operating environment

    In environments where foreign matter or moisture may enter, selecting contact-seal types such as RS or 2RS, or grease-packed types, helps retain lubricant and reduces relubrication effort. However, the seal increases rotational resistance and imposes limits on operating temperature, so these points should be considered.

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

About Needle roller bearings and all products

Description

Basic designs are available in single row (no suffix) and double row (suffix ZW). Features a simple, robust design and accurate roller guidance within the cage pockets. Special cage-type needle rollers for gudgeon pins and crankpins of connecting rods are also available.

Features

  • Self-contained, easy to install
  • High load capacity
  • Simple, robust design
  • Good running performance

Applications

  • Internal combustion engines
  • Compressors
  • Bearing arrangements with limited radial space

FAQ

Q. What applications and space conditions are SKF K series needle roller cage assemblies suitable for?
A. Their small cross-section and high load capacity make them suitable for locations where radial space is limited. Applications include internal combustion engines, compressors, and bearing arrangements with limited radial space.
Q. Are SKF K series needle roller bearings available in single row and double row types?
A. Basic designs are available in single row (no suffix) and double row (suffix ZW). They feature a simple, robust design and accurate roller guidance within the cage pockets.
Q. What are the main specification ranges for SKF K series needle roller bearings?
A. Roller inscribed circle diameter Fw is 3 to 265 mm, basic dynamic load rating Cr is 1.42 to 242 kN, basic static load rating C0r is 1.02 to 850 kN, and limiting speed is 1500 to 40000 r/min.
Q. What are the installation and running performance advantages of SKF K series needle roller cage assemblies?
A. They are self-contained and can be fitted as is, making installation easy. They also offer good running performance.
Q. Does the SKF K series include needle roller cage assemblies for gudgeon pins and crankpins of connecting rods?
A. Yes, special cage-type needle rollers for gudgeon pins and crankpins of connecting rods are also available.

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

Source documents

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