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Long-Life Bearings SH Bearing, KE Bearing, NK Bearing

SH軸受・KE軸受・NK軸受 / JTEKT Corporation (Official website) / Listed on page 3 of the document

Long-life bearings with optimized surface hardness and retained austenite content achieved through special heat treatment. Delivers high performance in harsh vehicle environments.

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Long-Life Bearings SH Bearing, KE Bearing, NK Bearing on page 3 of JTEKT Corporation "農業機械・建設機械用 商品のご紹介"
Source: JTEKT Corporation「農業機械・建設機械用 商品のご紹介」page 3
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Specifications

Inner diameter d 12〜75 mm

How to choose Rolling Bearings

Points to check when selecting, with the values for this product (Long-Life Bearings SH Bearing, KE Bearing, NK Bearing).

  1. 1. Bore and housing bore dimensions

    This product: Inner diameter d 12〜75 mm

    Select the bore diameter d to match the shaft seat, the outside diameter D to match the housing bore, and the width B to suit the installation space. Main dimensions are standardized in ISO and JIS dimension series, so interchangeable products can be found by boundary dimension designation. For tapered roller bearings, also check the assembled width T; for thrust bearings, also check the height H.

  2. 2. Dynamic load rating based on life calculation

    The basic dynamic load rating Cr is the reference value for calculating rated life. Verify that the required life is met using the equivalent load during operation and the rotational speed. For ball bearings, life is proportional to the cube of the load ratio, so providing load margin greatly extends life.

  3. 3. Margin for static and shock loads

    The basic static load rating C0r is the allowable standard for permanent deformation generated at the rolling elements and raceways under stationary or low-speed conditions. For applications with oscillating motion or shock loads, confirm that a static safety factor against the maximum load is secured using C0r.

  4. 4. Operating speed and lubrication method

    The limiting speed differs by lubrication method, and separate values are given for grease lubrication and oil lubrication. Confirm that the normal operating speed does not exceed the limiting value, and in high-speed ranges also consider cage material and precision grade. The reference speed can also be consulted as a thermal guideline.

  5. 5. Precision grade and internal clearance

    Precision grades (P0, P6, P5, etc.) indicate rotational accuracy and dimensional accuracy; for high-precision applications such as machine tool spindles, select higher grades. Internal clearance (C2, CN, C3, etc.) is selected to allow for changes caused by interference fit and temperature differences during operation.

  6. 6. Materials and lubrication suited to the environment

    For corrosive, high-temperature, vacuum, or clean environments, select specifications such as rings and rolling elements made of stainless steel or ceramics, or solid lubricants and fluorine grease for vacuum use. Check the operating temperature range, low dust generation, and whether food-grade grease registration applies against the application conditions.

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

About Rolling Bearings and all products

Description

SH bearings are applied to bearing steel ball bearings and cylindrical roller bearings, and KE bearings to case-hardening steel tapered roller bearings. Increased hardness of the raceway surface suppresses indentations caused by foreign matter biting. NK bearings are a next-generation product that strengthen the microstructure through optimized material and heat treatment, achieving a service life exceeding that of SH and KE bearings.

Features

  • Increased raceway surface hardness suppresses indentations caused by foreign matter biting
  • Microstructure improvement suppresses the raised height of indentations
  • NK bearings improve fatigue strength through microstructure strengthening and optimized retained austenite

Applications

  • Axle
  • Transmission
  • Differential

FAQ

Q. To which types of bearings are SH, KE, and NK bearings applied respectively?
A. SH bearings are applied to bearing steel ball bearings and cylindrical roller bearings, and KE bearings are applied to case-hardening steel tapered roller bearings. NK bearings are a next-generation product.
Q. What effect do SH, KE, and NK bearings have when foreign matter bites into them?
A. Increased raceway surface hardness suppresses indentations caused by foreign matter biting. Microstructure improvement further suppresses the raised height of the indentations.
Q. How do NK bearings differ from SH and KE bearings in service life and fatigue strength?
A. NK bearings strengthen the microstructure through optimized material and heat treatment, achieving a service life exceeding that of SH and KE bearings. Microstructure strengthening and optimized retained austenite also improve fatigue strength.
Q. What is the inner diameter range and main applications of SH, KE, and NK bearings?
A. The inner diameter d ranges from 12 to 75 mm. The main applications are axles, transmissions, and differentials.

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

Source documents

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