Solid Needle Roller Bearing with Flange and Inner Ring

Specifications

How to choose Needle roller bearings

Points to check when selecting, with the values for this product (Solid Needle Roller Bearing with Flange and Inner Ring).

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

   This product: Outer diameter D 15 〜 47 mm

   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

   This product: Limiting speed 6 300 〜 36 000 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

Flanged needle roller bearing with inner ring. Series include NKI, NA 49, NA 69, and NKIS, with basic dynamic load rating and reference speed listed by bore, outside diameter, and width. Sealed types with RS and 2RS seals are also available.

FAQ

Q. What is the bore diameter d range for SKF flanged needle roller bearings with inner ring in the NKI, NA 49, NA 69, and NKIS series?

A. The bore diameter d is 5 to 28 mm. The range is mainly focused on small bore sizes from 5 to 28 mm.

Q. What are the outside diameter D and width B ranges for solid needle roller bearings in the NKI / NA 49 / NA 69 / NKIS series?

A. The outside diameter D is 15 to 47 mm, and the width B is 12 to 23 mm.

Q. Are sealed types available for the SKF NKI / NA 49 / NA 69 / NKIS series?

A. Sealed types with RS and 2RS seals are available.

Q. How can solid needle roller bearings in the NKI / NA 49 / NA 69 / NKIS series be used with the flange?

A. The flange enables axial positioning. The inner ring also makes mounting easy.

Q. What is the reference speed range for SKF NKI / NA 49 / NA 69 / NKIS series bearings?

A. The reference speed is 6 300 to 36 000 r/min.

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

Source documents

• Catalog 針状ころ軸受 (SKF 製品カタログ・技術資料抜粋) 124 pages Open page 87
  Found on: https://azuma-eg.com/catalogue/