Hybrid Ceramic Bearing (Insulated, High-Speed Type)

Specifications

How to choose Rolling Bearings

Points to check when selecting, with the values for this product (Hybrid Ceramic Bearing (Insulated, High-Speed Type)).

1. 1. Bore and housing bore dimensions

   This product: Inner diameter d 4～40 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

Lubricated with grease or oil, it can be used as an insulated bearing or a high-speed bearing. Reduces temperature rise and vibration, and also offers excellent seizure resistance.

FAQ

Q. What applications can 3NC series hybrid ceramic bearings (insulated, high-speed type) be used for?

A. They can be used for high-speed twisting machine guide rolls, motors, and generators. They can be used as insulated bearings or high-speed bearings.

Q. What features and dimensional ranges do 3NC series hybrid ceramic bearings such as 3NC604ZZM5 FG have?

A. They offer electrical insulation, high-speed rotation capability, and reduced temperature rise and vibration. Bore diameter d is 4 to 40 mm, outside diameter D is 12 to 80 mm, and the allowable rotational speed is 11,100 to 83,200 min-1.

Q. What is the structure of 3NC series hybrid ceramic bearings, and how are they lubricated?

A. They are radial ball bearings combining silicon nitride ceramic balls with steel inner and outer rings. They are lubricated with grease or oil.

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

Source documents

• Catalog 特殊環境用軸受シリーズ 軸受・セラミック軸受 (EXSEV Bearings and CERAMIC Bearings for Extreme Special Environments)
  Found on: https://koyo.jtekt.co.jp/support/catalog-download/