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SKF Dry Lube Bearings

SKF (Official website) / Listed on page 56 of the document

Bearings filled with dry lubricant based primarily on graphite and molybdenum disulfide, designed for environments where relubrication is difficult, such as high or low temperatures and high-speed rotation. Includes deep groove ball bearings, Y-bearings, various roller bearings, and thrust bearings.

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SKF Dry Lube Bearings on page 56 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 56
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Specifications

Minimum Operating Temperature -60 °C
Maximum Operating Temperature 250 °C
Limiting speed factor dmn 60000 r/min·mm

How to choose Rolling Bearings

Points to check when selecting, with the values for this product (SKF Dry Lube Bearings).

  1. 1. Bore and housing bore dimensions

    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

The bearing interior is filled with dry lubricant, eliminating the need for relubrication. Temperature limits, limiting speeds, and the presence or absence of a phosphate coating vary by variant. Some types incorporate PFPE oil additives or nanoparticles. Open-type bearings can be used up to 250 °C, and shielded bearings on both sides up to 350 °C.

Features

  • Lubricated for life, no relubrication required
  • Minimum temperature -60 °C, open type up to 250 °C, both-side shielded up to 350 °C
  • Optional PFPE oil additive and nanoparticles
  • Some deep groove ball bearings and Y-bearings feature phosphate coating
  • Food-grade NSF H1 compliant version available (VA260)

Applications

  • Steel industry (rolls, cooling beds, guide rolls, etc.)
  • Industrial furnaces (kiln car wheels, roller hearth furnaces, chain bearings, etc.)
  • Food and beverage industry (ovens, conveyors, sterilization equipment, etc.)
  • Automotive and powder coating lines
  • Paper industry (paper processing lines, rope sheaves, etc.)

FAQ

Q. In what temperature range can SKF Dry Lube bearings be used?
A. The minimum operating temperature is -60 °C. Open-type bearings can be used up to 250 °C, and bearings shielded on both sides up to 350 °C.
Q. Do SKF Dry Lube bearings require relubrication?
A. No. The bearing interior is filled with dry lubricant, eliminating the need for relubrication. They are lubricated for life.
Q. What is the limiting rotational speed of SKF Dry Lube bearings?
A. The limiting speed factor dmn is 60000 r/min·mm. The limiting speed varies depending on the variant.
Q. What types and lubricant options are available for SKF Dry Lube bearings?
A. Types include deep groove ball bearings, Y-bearings, various roller bearings, and thrust bearings. Versions with PFPE oil additives or nanoparticles are also available. Some deep groove ball bearings and Y-bearings have a phosphate coating.
Q. Can SKF Dry Lube bearings be used in food applications?
A. Yes. A food-grade NSF H1 compliant version is available, with model number VA260. Food and beverage applications such as ovens, conveyors, and sterilization equipment are also listed.

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

Source documents

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