Product
A.P. LOCK
(Keyless Bushing)

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A.P. Lock (Keyless Bushing) is a power transmission component that
enables to clamp shaft and hubs (i.e. pulley, gear etc.) simultaneously
through its surface pressure. S.I.M provides diverse options in regards
to size, body material and surface treatment.

  • INDEX (A.P.LOCK)
  • Selection and Design Guide
  • HOW TO INSTALL
    (SAPL-A, B,C, D1, D2, D3, D4, T Series)
  • HOW TO INSTALL (SAPL-R)
  • HOW TO INSTALL (SAPC, SAPA)

HOW TO INSTALL (SAPC, SAPA)

HOW TO INSTALL (SAPC, SAPA)
  1. Wipe inner surface of shaft and hub to remove dust and oil.
  2. A.P. Lock which is made of aluminum alloy does not require any anti-wear hydraulic oil.
  3. Interlock an A.P. Lock with shaft temporarily and insert it into the hub.
    • Make sure the corner of hub becomes properly attached to A.P. Lock’s flange part.
    • Determine the relative location of shaft and hub using measurement tool e.g. Vernier calipers etc.
    • In case A.P. Lock doesn’t go into hub smoothly, try to loosen fastening screws or tapping them into hub slightly. (Make sure the force is not too strong.)
    SAPC Series (Example)
    (※ SAPA series looks identical to SAPL-A series when installed.)
  4. Fasten the screws with appropriate fastening torque in sequential order as shown on the below figure.
    • Fasten the screws with identical torque ¼ of fastening torque) using torque wrench.
    • Make sure you fasten the screws in sequential order as shown on the above figure.
    • Make sure A.P. Lock’s flange part becomes properly attached to hub.
    • Repeat fastening the screws with ½ of fastening torque. (in diagonal order)
    • Finally repeat fastening the screws with full fastening torque until screws don’t rotate any longer.
HOW TO DISASSEMBLE
  1. Remove external load (torque/thrust) on the shaft and hub.
  2. Remove self-load of e.g. chain, belt etc.
  3. Unfasten all screws in the same order that they were fastened.
  4. In case A.P. Lock is not detached properly, try to disassemble using the tapped-hole for disassembly on A.P. Lock body.
RE-USE
  • A.P. Lock can be used repeatedly.
  • In case surface pressure is stronger than yield stress of shaft or hub, it may result in shape distortion of shaft of hub as well as A.P. Lock.
CAUTIONS
  1. Temperature range : - 30℃ ~ + 200℃
  2. Make sure the screws are fastened by torque wrench. (Please refer to “Dimensions / Performance” tables for fastening torques.
  3. A.P. Lock is vulnerable at bending moment.
  4. In case there is not enough lubrication with anti-wear hydraulic oil, transmittable torque would be decreased by appx. 25%.
    (Please do not allow to use anti-wear hydraulic oil at vacuum area.)
  5. When the shaft has an additional keyway, permissible torque would be decreased by appx. 20% due to reduced contact area.