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INSOCOAT Deep Groove Ball Bearing

INSOCOAT深溝玉軸受 (C3VL0241/C3VL2071) / SKF (Official website) / Listed on page 65 of the document

A deep groove ball bearing with an insulating coating applied to the outer ring or inner ring to prevent electrical erosion in motors and similar equipment. Provides insulation protection against both DC and AC.

Last verified: (date the content was verified against the source document)

INSOCOAT Deep Groove Ball Bearing on page 65 of SKF "SKF 転がり軸受カタログ 15 エンジニアリング製品 15A センサー軸受ユニット"
Source: SKF「SKF 転がり軸受カタログ 15 エンジニアリング製品 15A センサー軸受ユニット」page 65
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Specifications

Inner diameter d 70 to 150 mm
Minimum Insulation Resistance (1000 V DC) 50 MΩ
Approximate dielectric breakdown voltage 3000 or more V DC
Internal clearance C3

How to choose Deep Groove Ball Bearings

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

  1. 1. Main dimensions to suit shaft and housing

    This product: Inner diameter d 70 to 150 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

    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

    This product: Internal clearance C3

    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

Deep groove ball bearing with a bore diameter of 70 to 150 mm. The standard INSOCOAT layer provides a resistance of 50 MΩ or more at 1000 V DC, and insulation breakdown occurs above 3000 V DC. Available as an outer ring coated type (VL0241) and an inner ring coated type (VL2071). Dimensional standard is ISO 15, and internal clearance is C3.

Features

  • Electrical insulation through outer ring or inner ring coating
  • Protection against both DC and AC
  • Some models available as sealed type

Applications

  • Electric motors
  • Generators

FAQ

Q. What is the bore diameter range and internal clearance of the INSOCOAT Deep Groove Ball Bearing (C3VL0241/C3VL2071)?
A. The bore diameter ranges from 70 to 150 mm, and the internal clearance is C3.
Q. What is the insulation performance of the INSOCOAT Deep Groove Ball Bearing (C3VL0241/C3VL2071)?
A. It provides a resistance of 50 MΩ or more at 1000 V DC, and insulation breakdown occurs above 3000 V DC.
Q. What is the difference in coating and the dimensional standard of the INSOCOAT Deep Groove Ball Bearing (C3VL0241/C3VL2071)?
A. The outer ring coated type is VL0241 and the inner ring coated type is VL2071. The dimensional standard is ISO 15.
Q. What applications can the INSOCOAT Deep Groove Ball Bearing (C3VL0241/C3VL2071) be used for?
A. It is used in electric motors, generators, and other equipment to prevent electrical erosion. It provides insulation protection against both DC and AC.

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

Source documents

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