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Tapered Bore Spherical Roller Bearings (Including SKF Explorer / E2)

22205 E など 213・222・223・230・231・232・238・239・240・241・248・249 系列 / SKF (Official website) / Listed on page 78 of the document

SKF spherical roller bearings available with both cylindrical and tapered bores (taper ratio 1:12), covering bore diameters of 20 to 95 mm. The listing includes main dimensions, basic load ratings, limiting speeds, mounting-related dimensions and calculation factors.

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

Tapered Bore Spherical Roller Bearings (Including SKF Explorer / E2) on page 78 of SKF "SKF 球面ころ軸受 (製品データ表 8章抜粋)"
Source: SKF「SKF 球面ころ軸受 (製品データ表 8章抜粋)」page 78
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Specifications

Inner diameter d 20〜95 mm
Outer diameter D 52〜200 mm
Width B 17〜67 mm
Basic dynamic load rating Cr 41.5〜765 kN
Basic static load rating C0r 4.55〜765 kN
Limiting speed (grease lubrication) 5,000〜17,000 r/min
Permissible self-aligning angle 1〜3.5 °
Operating Temperature Range -40〜+90 °C

How to choose Rolling Bearings

Points to check when selecting, with the values for this product (Tapered Bore Spherical Roller Bearings (Including SKF Explorer / E2)).

  1. 1. Bore and housing bore dimensions

    This product: Inner diameter d 20〜95 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

    This product: Basic dynamic load rating Cr 41.5〜765 kN

    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

    This product: Basic static load rating C0r 4.55〜765 kN

    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

    This product: Limiting speed (grease lubrication) 5,000〜17,000 r/min

    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

    This product: Operating Temperature Range -40〜+90 °C

    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

Radial internal clearance can be selected from C2, Normal, C3, C4 and C5. Misalignment is 1 to 3.5° depending on the series. Seal materials are NBR (-40 to +90°C), HNBR (-40 to +150°C) and FKM (-30 to +200°C). Bearing rings can be used at up to 200°C for a maximum of 2,500 hours. Tapered bore bearings are mounted with an interference fit using adapter sleeves or similar components, and the SKF Drive-up Method is recommended for d > 100 mm.

Features

  • SKF Explorer bearings
  • SKF energy efficient bearings (E2)
  • Tapered bore (1:12)
  • Selectable internal clearance

Applications

  • Industrial machinery
  • Rotating equipment

FAQ

Q. How are tapered bore spherical roller bearings mounted?
A. Tapered bore bearings are mounted with an interference fit using adapter sleeves or similar components. For d > 100 mm, the SKF Drive-up Method is recommended.
Q. What internal clearances can be selected for SKF spherical roller bearing 22205 E?
A. Radial internal clearance can be selected from C2, Normal, C3, C4 and C5.
Q. What is the permissible misalignment for SKF spherical roller bearing 22205 E?
A. The permissible misalignment is 1 to 3.5° depending on the series.
Q. What seal materials and operating temperature ranges are available for SKF spherical roller bearing 22205 E?
A. Seal materials are NBR (-40 to +90°C), HNBR (-40 to +150°C) and FKM (-30 to +200°C). Bearing rings can be used at up to 200°C for a maximum of 2,500 hours.
Q. What are the ranges of bore diameter, outside diameter and width for SKF tapered bore spherical roller bearings?
A. Bore diameter d is 20 to 95 mm, outside diameter D is 52 to 200 mm, and width B is 17 to 67 mm.

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

Source documents

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