Catalog Searcher
Categories

Needle Roller Bearing with Cage

K形 / NTN Corporation (Official website) / Listed on page 4 of the document

Needle roller bearing with a cage that guides the rollers. Small diameter with high load capacity, low friction, suitable for high-speed rotation. Also suitable for oscillating applications.

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

Needle Roller Bearing with Cage on page 4 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 4
A reduced image of the relevant page is quoted from the document. Copyright belongs to NTN Corporation.Request removal

Specifications

Coefficient of Friction 0.0020～0.0030
Load capacity Smaller than full roller type

How to choose Needle roller bearings

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

  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

    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

The cage reliably guides the needle rollers, enabling accurate rotational motion. Compared with full complement type, the friction coefficient is lower, temperature rise is lower, and the allowable rotational speed is higher. Available in many types, including K type, KBK type, PK type, HK type, and shell type.

Features

  • Small diameter with high load capacity
  • Low mass and low inertial force
  • High rigidity
  • Suitable for high-speed rotation
  • Low friction coefficient (0.0020 to 0.0030)

Applications

  • Automotive engines (crankpin and piston pin)
  • Connecting rods
  • Idlers
  • General industrial machinery

FAQ

Q. What applications are K type needle roller bearings with cage suited for?
A. They are used in automotive engines (crankpin and piston pin), connecting rods, idlers, and general industrial machinery. They are also suitable for oscillating applications.
Q. What are the features of K type needle roller bearings with cage?
A. They have a small diameter with high load capacity and low mass, resulting in low inertial force. They have high rigidity and are suitable for high-speed rotation. The friction coefficient is 0.0020 to 0.0030.
Q. How do K type needle roller bearings with cage differ from full complement type?
A. The cage reliably guides the rollers, enabling accurate rotational motion. Compared with full complement type, the friction coefficient is lower, temperature rise is lower, and the allowable rotational speed is higher. The load capacity is lower than that of full complement type.
Q. What types are available for K type needle roller bearings with cage?
A. Many types are available, including K type, KBK type, PK type, HK type, and shell type.

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

Source documents

Similar products (other manufacturers)

Needle roller bearings products, ordered by similarity of specifications and applications.

More products from NTN Corporation

See all →