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Cam Follower

KR / KRV / NUKR / NTN Corporation (Official website) / Listed on page 40 of the document

Stud-type needle roller bearing with an outer ring, mounted to the machine body with a stud and rolling along cams or rails. Available in a wide range of sizes from boundary dimension 8 to 180, with technical data including track load capacity and outer ring strength.

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Cam Follower on page 40 of NTN Corporation "ニードルローラベアリング ハンドブック"
Source: NTN Corporation「ニードルローラベアリング ハンドブック」page 40
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Specifications

Nominal number range 8～180
Basic static load rating C0r 17900 N
Basic dynamic load rating Cr 12200 N

How to choose Needle roller bearings

Points to check when selecting, with the values for this product (Cam Follower).

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

    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 12200 N

    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

    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

Includes the KR, KRV and NUKR series. Reference data lists outside diameter, rated load, track load capacity, outer ring strength, stud strength and calculated tightening torque and tightening force. Because many sizes are available, the products are handled together by series.

Features

  • Outer ring type that is easy to install
  • Rated load listed for each boundary dimension number
  • Calculated tightening torque and tightening force provided

Applications

  • Cam mechanisms
  • Guidance on rails
  • Conveying machinery

FAQ

Q. What size range can be selected for NTN cam followers (KR / KRV / NUKR series)?
A. A wide range of sizes is available, from boundary dimension 8 to 180.
Q. What are the basic static load rating and basic dynamic load rating of NTN cam followers (KR / KRV / NUKR series)?
A. The basic static load rating C0r is 17900 N and the basic dynamic load rating Cr is 12200 N. These are examples of the specifications; rated loads for each boundary dimension number are listed in the reference data.
Q. How can NTN cam followers be used in cam mechanisms, rail guidance and conveying machinery?
A. They are needle roller bearings with an outer ring, mounted to the machine body with a stud and used for applications where they roll along cams or rails.
Q. Can the tightening torque and tightening force required for installing NTN cam followers (KR / KRV / NUKR series) be checked?
A. Calculated values for tightening torque and tightening force are listed in the reference data.
Q. Is information on track load capacity, outer ring strength and stud strength available for NTN cam followers (KR / KRV / NUKR series)?
A. Calculated values for outside diameter, rated load, track load capacity, outer ring strength, stud strength and tightening torque are listed in the reference data.

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

Source documents

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