Deep Groove Ball Bearing with Snap Ring and Shield, Single Row

Specifications

How to choose Deep Groove Ball Bearings

Points to check when selecting, with the values for this product (Deep Groove Ball Bearing with Snap Ring and Shield, Single Row).

1. 1. Main dimensions to suit shaft and housing

   This product: Inner diameter d 65〜70 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 24〜35 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

   This product: Basic static load rating C0r 40.5〜68 kN

   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

   This product: Limiting speed (grease lubrication) 6300〜7500 r/min

   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

Single row deep groove ball bearing with bore diameter of 65 to 70 mm, available in two types: with snap ring (ZNR) and with shields (2ZNR). The limiting speed of the bearing with shields on both sides is approximately 80% of the stated value.

FAQ

Q. How are the snap ring type (ZNR) and the shielded type (2ZNR) of the SKF Explorer single row deep groove ball bearing with snap ring and shield used differently?

A. The product information states that two types are available: with snap ring (ZNR) and with shields (2ZNR). The limiting speed of the bearing with shields on both sides is approximately 80% of the stated value.

Q. What are the ranges of bore diameter, basic dynamic load rating, basic static load rating and limiting speed for the single row deep groove ball bearing with snap ring and shield?

A. Bore diameter d is 65 to 70 mm, basic dynamic load rating Cr is 24 to 35 kN, and basic static load rating C0r is 40.5 to 68 kN. Reference speed is 9500 to 12000 r/min, and limiting speed (grease lubrication) is 6300 to 7500 r/min.

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

Source documents

• Catalog SKF 深溝玉軸受 製品カタログ(設計およびバリエーション) 126 pages Open page 91
  Found on: https://azuma-eg.com/catalogue/