Deep Groove Ball Bearing

Specifications

How to choose Deep Groove Ball Bearings

Points to check when selecting, with the values for this product (Deep Groove Ball Bearing).

1. 1. Main dimensions to suit shaft and housing

   This product: Inner diameter d 100～1420 mm

   Select the bore diameter d to match the shaft diameter, the outside diameter D to match the housing bore, and the width B to suit the installation space. The listed products cover a wide range of bore diameters from 0.6 to 1420 mm, and even at the same bore diameter there are dimension series with different outside diameters and widths. Since load capacity and mass change with the dimension series, confirm the three dimensions in combination.

2. 2. Basic dynamic load rating for life calculation

   This product: Basic dynamic load rating Cr 24.5～3630 kN

   The basic dynamic load rating Cr is the reference value for calculating rolling fatigue life, and life is estimated from the ratio of the actual applied load to Cr. For high loads or when long life is required, select a bearing with a larger Cr. Bearings made of special materials may have lower ratings than steel bearings of the same dimensions, so confirm life under the operating conditions.

3. 3. Check static and shock loads against static rating

   The basic static load rating C0r is the guideline load at which permanent deformation does not occur, applicable when stationary, rotating at low speed, or subjected to shock loads. For applications with oscillating motion or large loads while stopped, select with emphasis on the ratio to C0r (static safety factor) rather than the dynamic rating.

4. 4. Internal clearance to suit fit and temperature

   Radial internal clearance decreases during operation due to interference fits and temperature differences between the inner and outer rings. Clearances larger than standard, such as C3, are used in applications where the inner ring tends to expand, such as motors or high-temperature environments. Clearance that is too small leads to heat generation and seizure, so determine the class from the fit and operating temperature.

5. 5. Materials and lubrication suited to the environment

   Stainless steel or ceramics (silicon nitride, zirconia, silicon carbide) are used in water or chemical solutions, while solid lubricants such as graphite or fluorine-based solids and fluorine grease are used in high-temperature, vacuum or clean environments. Listed products have maximum operating temperatures of 250 to 350°C, so select the material and lubrication method based on temperature, atmosphere and dust-generation requirements.

6. 6. Check speed limits and electrical corrosion countermeasures

   Confirm that the limiting speed and reference speed exceed the operating speed. In equipment where shaft current flows, such as inverter-driven motors, hybrid bearings with insulating-coated or ceramic balls can prevent electrolytic corrosion. Ceramic balls are lighter than steel balls, so the effect of centrifugal force is reduced even at high speeds.

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

About Deep Groove Ball Bearings and all products

Description

Standard series conforming to JIS B 1512, with tolerances conforming to Class 0 or Class 6 of JIS B 1514. Pressed cage or machined cage is standard. Dimension tables list basic load ratings, fatigue limit load factor, mounting dimensions, bearing numbers, and mass.

FAQ

Q. What types of load can a deep groove ball bearing (single-row deep groove ball bearing) accept?

A. It is a single-row ball bearing that accepts radial load and axial load in both directions.

Q. What applications are deep groove ball bearings suited for?

A. They are suited for high-speed rotation and low-vibration applications. They are used in general machinery, high-speed rotating equipment, and rotating parts of electric motors and reducers.

Q. What is the bore and size range of deep groove ball bearings?

A. The bore diameter d is 100 to 1420 mm. Dimension tables covering bore diameters from 100 to 1420 mm are provided.

Q. What are the basic dynamic load rating and allowable inclination angle of deep groove ball bearings?

A. The basic dynamic load rating Cr is 24.5 to 3630 kN, and the allowable inclination angle is 0.0023 to 0.0034 rad.

Q. What are the tolerance and cage types of deep groove ball bearings?

A. Tolerances conform to Class 0 or Class 6 of JIS B 1514, so the tolerance class is Class 0 or Class 6. Pressed cage or machined cage is standard and selectable.

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

Source documents

• Catalog JTEKT 大形転がり軸受カタログ（技術解説・軸受寸法表） Open page 53
  Found on: https://koyo.jtekt.co.jp/support/catalog-download/