Low profile chocks

SKF Vibracon

Low profile chocks (-ASTR series)
The low profile elements offer an economic solution for repair projects or fixed design systems where expensive milled chocks, shims or epoxy resins were applied previously.
SKF Vibracon low profile configuration addresses those applications where the chock height between the foundation and component has been established by the previous design. Most of the other chocking methods are time-consuming and do not support the life cycle needs of the machine owners and installation activities on a tight schedule.

Technical data

  • Metric
    Dimensions - Metric
    DesignationM
    Bolt
    size
    A
    min.
    height
    A
    nominal
    height
    A
    max.
    height
    Min.
    reduced
    height 1)
     
    mmmmmmmm
    SM 16 LP-ASTRM1620253020
    SM 20 LP-ASTRM2020253020
    SM 24 LP-ASTRM2420253020
    SM 30 LP-ASTRM3020253020
    SM 36 LP-ASTRM3630354030
    SM 42 LP-ASTRM4235404535
    1) The SKF Vibracon low profile cannot be further reduced in height.
    Designationd1
    diameter
    d2
    bolt hole
    dk
    key
    holes
    PitchMass
     mmmmmmmmkg
    SM 16 LP-ASTR802161,50,6
    SM 20 LP-ASTR10025620,9
    SM 24 LP-ASTR12031621,3
    SM 30 LP-ASTR14037621,8
    SM 36 LP-ASTR16044623,7
    SM 42 LP-ASTR19050626,2
    Technical data - Metric
    DesignationBolt sizeTightening
    torque 1)
    Bolt
    size
    Tightening
    torque 1)
      Nm Nm
    SM 16 LP-ASTRM16215M18270
    SM 20 LP-ASTRM20420M22500
    SM 24 LP-ASTRM24730M27890
    SM 30 LP-ASTRM301 460M331 745
    SM 36 LP-ASTRM362 570M393 000
    SM 42 LP-ASTRM424 125M454 995
      
      Max.
    bolt size 2)
    Machine
    load 3)
    Proof
    load 4)
      
      kNkN 
    SM 16 LP-ASTRM2015255 
    SM 20 LP-ASTRM2425270 
    SM 24 LP-ASTRM3035310 
    SM 30 LP-ASTRM3660475 
    SM 36 LP-ASTRM42901 000 
    SM 42 LP-ASTRM481201 625 
     
    1) Torque values are valid for bolts with metric thread, material grade 8.8, yield strength >640 N/mm2, oil lubricated thread courses and nut mating surfaces without slide additives. Vibracon size ideally is matched to the related bolt size: SM 20 -> M20
    2) Optional bolt size. For an engineered solution, please contact vibracon@skf.com.
    3) Machine load is the sum of the weight of the component and the dynamic forces on the SKF Vibracon for the heaviest loaded position, multiplied by a safety factor.
    4) Proof load is the tested load which can be applied on the SKF Vibracon chock at maximum height before plastic deformation will occur. Exceeding the proof load will permanently
    deform the element, rendering it no longer adjustable. This is a tested load for SKF Vibracon surface treated chocks only.
    Please contact vibracon@skf.com, your local SKF Authorised Distributor or SKF sales representative for support, customization or more information about SKF Vibracon.
  • Imperial
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