Premium Shell Bearing

Specifications

How to choose Needle roller bearings

Points to check when selecting, with the values for this product (HK2216F).

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

   This product: Roller pitch circle diameter Fw 22 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

   This product: Outer diameter D 28 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

   This product: Basic dynamic load rating Cr 13200 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

Shell-type needle roller bearing with three times the service life and 1.5 times the static load rating of conventional standard products. The outer ring uses chromium molybdenum steel as standard, carburized and hardened to increase the internal hardness of the outer ring. Optimization of the outer ring generatrix profile and chamfer shape reduces press-fitting force during installation.

FAQ

Q. What are the dimensions and load ratings of HK2216F (Premium Shell Bearing)?

A. Roller inscribed circle diameter Fw is 22 mm, outer diameter D is 28 mm, and width C is 16 mm. Basic dynamic load rating Cr is 13200 N, and basic static load rating C0r is 21100 N.

Q. What is the upper limit of rotational speed for HK2216F, and is there a difference between grease and oil lubrication?

A. The limiting speed is 7500 min-1 with grease lubrication and 11000 min-1 with oil lubrication.

Q. How has HK2216F improved compared with conventional products?

A. Compared with conventional standard products, service life is three times longer and static load rating is 1.5 times higher. It can be used at safety factor S0 ≧ 2.

Q. What are the outer ring material, treatment, and installation characteristics of HK2216F?

A. Chromium molybdenum steel carburized and hardened is standard for the outer ring, increasing its internal hardness. Optimization of the outer ring generatrix profile and chamfer shape reduces press-fitting force during installation.

Q. What applications is HK2216F suited for?

A. It is used in rotating support sections of various industrial machinery.

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

Source documents

• Catalog ニードルローラベアリング ハンドブック 80 pages Open page 53
  Found on: https://www.ntn.co.jp/japan/products/catalog/ja/2203/index.html