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Withdrawal Sleeve

AOH系列（オイルインジェクション用） / SKF (Official website) / Listed on page 48 of the document

A sleeve pressed into the bore of a tapered-bore bearing inner ring when mounting the bearing onto the cylindrical seat of a stepped shaft.

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Withdrawal Sleeve on page 48 of SKF "軸受付属品（アダプタスリーブ・取り外しスリーブ・ロックナット）"
Source: SKF「軸受付属品（アダプタスリーブ・取り外しスリーブ・ロックナット）」page 48
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Specifications

Dimensional Standard ISO 2982-1
Inner diameter tolerance JS9
Width Tolerance h13
Taper ratio of outer diameter 1:12 (1:30 for A(O)H 240 and 241 series)
Thread standard (bore diameter 180 mm or less) Metric threads per ISO 965-3
Thread standard (bore diameter 190 mm or more) Metric trapezoidal threads per ISO 2903
Shaft tolerance h9
Cylindricity IT5/2（ISO 1101）

How to choose Removal sleeves

Points to check when selecting, with the values for this product (Withdrawal Sleeve).

  1. 1. Select inner diameter d1 to match shaft diameter

    The inner diameter d1 is the applicable shaft diameter. Listed products range from 35 to 1060 mm. Also confirm that shaft machining can meet the recommended shaft tolerance and cylindricity. Poor roundness or cylindricity causes uneven interference, which can lead to inner ring cracking or creep (slip rotation).

  2. 2. Match outer diameter d to bearing bore

    The outer diameter d is the nominal outer diameter of the tapered section and corresponds to the bore of the bearing to be combined. Even for the same shaft diameter, the outer diameter and width vary by bearing series. Therefore, verify the combination with the bearing to be used against the applicable bearing series and bearing number table when selecting.

  3. 3. Match taper ratio to the bearing

    This product: Taper ratio of outer diameter 1:12 (1:30 for A(O)H 240 and 241 series)

    The outer taper ratio of the sleeve must match the tapered bore of the bearing inner ring. Generally it is 1:12, and wide series (such as the 240 and 241 series) use 1:30. A mismatched taper ratio will not clamp correctly and internal clearance cannot be adjusted properly. Check against the suffix of the bearing number (K or K30).

  4. 4. Check width B1 and shaft mounting length

    Width B1 is the total width of the sleeve. It equals the bearing width plus the press-in allowance and nut engagement allowance, so confirm it fits within the dimension from the shoulder of the stepped shaft to the shaft end. If it does not fit, the bearing cannot be pushed to its specified position.

  5. 5. Match thread size and withdrawal nut

    During removal, the withdrawal nut is fitted to the thread on the sleeve and used to pull it out. Confirm the thread designation and applicable nut number, and arrange the nut at the same time. Generally, small sizes use metric threads, and large sizes with inner diameter of 190 mm or more use trapezoidal threads.

  6. 6. Select hydraulic-removal type for large sizes

    Large bearings have high clamping force, making mechanical extraction difficult. Selecting the H-type model with oil holes and oil grooves (such as AOH) allows pressure oil to be injected to relieve the interference. Combined with a hydraulic nut, it reduces the maintenance workload.

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

About Removal sleeves and all products

Description

A sleeve with an axial slit; the nut must be ordered separately. Large sizes are provided with anti-rust treatment. The AOH series for oil injection supplies oil from a duct at the threaded end to the oil grooves on the inner and outer diameters.

Features

  • Use of a hydraulic nut recommended
  • Compatible with the oil injection method (AOH series)

Applications

  • Mounting of bearings on the cylindrical seat of a stepped shaft
  • Removal of bearings

FAQ

Q. What are the dimensional standard and tolerances for the AOH series withdrawal sleeve?
A. The dimensional standard is ISO 2982-1. The bore tolerance is JS9 and the width tolerance is h13. The shaft tolerance is h9, and the cylindricity is IT5/2 (ISO 1101).
Q. What are the taper ratio and thread standard for the AOH series withdrawal sleeve?
A. The taper ratio on the outer diameter is 1:12, except for the A(O)H 240 and 241 series, which is 1:30. The thread standard is ISO 965-3 compliant metric thread for bore diameters of 180 mm or less, and ISO 2903 compliant metric trapezoidal thread for bore diameters of 190 mm or more.
Q. What applications can the AOH series withdrawal sleeve be used for?
A. It is used by pressing it into the bore of a bearing inner ring when mounting a tapered-bore bearing onto the cylindrical seat of a stepped shaft. It can also be used for removing bearings.
Q. Can the oil injection method be used with the AOH series withdrawal sleeve?
A. Yes, the AOH series is compatible with the oil injection method. Oil is supplied from a duct at the threaded end to the oil grooves on the inner and outer diameters. Use of a hydraulic nut is recommended for removal.
Q. Does the AOH series withdrawal sleeve have a slit structure, and is a nut included?
A. It is a sleeve with an axial slit. The nut must be ordered separately. Large sizes are provided with anti-rust treatment.

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

Source documents

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