Farrat Jackmounts and Captive Jackmounts offer a simple secure and economical means of supporting and installing machinery suited to jackscrew support.

Manufactured in the UK by Farrat, our Jackmounts and Captive Jackmounts have been used for decades in thousands of applications around the world. Jackmounts should not be used under machines with strong vertical or horizontal shock forces (consider Isomounts, Wedgemounts or Isolated Foundations instead).

Farrat Jackmount Range used for supporting and installing machinery suited to jackscrew support

Farrat Jackmount and Captive Jackmount Range

Mounting sketch of the Farrat Jackmount Range, including Freestanding, Bolt-on and Screw Assemblies
Farrat Jackmounts

Available in three options:

  • Freestanding (F)
  • Freestanding + Screw Assembly
  • Bolt-On with Screw Assembly

(A variety of baseplate shapes, sizes, colours and optional AV Pads upon request).

AV Pad Grades

MountingApplicationAV Pad GradeAV Pad MaterialAV Pad Thickness
SoftVibration sensitive equipment, i.e. Measuring, Testing, Optical & Laboratory equipment-50NBR50-10P210
ElasticActive shock & vibration, i.e. Injection Moulding and Packaging machines-70NBR70-10P210
Very StiffVery stiff with damping, i.e. Lathes, Grinders and Transfer machines-90SG10-P210

Load Capacities & Dimensions

Part refMax Load for Av Pads (Kg) -50Max Load for Av Pads (Kg) -70Max Load for Av Pads (Kg) -90Base D (mm)Base H (mm)Base materialVariantCone Diameter (c)Screw Sizes
060*1503005007025Cast Iron 250FS(+SA),BO(+SA)20M10 M12 M16
080*2505001,0009025Cast Iron 250FS(+SA),BO(+SA)22M10 M12 M16 M20
100*4008001,40011025Cast Iron 250FS(+SA),BO(+SA)26M12 M16 M20 M24
120*5501,1002,00013027Cast Iron 250FS(+SA),BO(+SA)26M12 M16 M20 M24
130*6501,3002,40014027Cast Iron 250FS(+SA),BO(+SA)28M12 M16 M20 M24
170*1,1002,2004,00018027Cast Iron 250FS(+SA),BO(+SA)32M16 M20 M24
200*1,6003,2005,60021035SG500FS(+SA),BO(+SA)40M16 M20 M24
mounting-sketch-captive-jackmounts-01

Farrat Captive Jackmounts

Farrat Captive Jackmounts with an integrated tilting screw. Integrated pendulum screw with up to 5º tilt in all directions.

Available as Zinc plated or Stainless Steel.

AV Pad Grades

MountingApplicationAV Pad GradeAV Pad MaterialAV Pad Thickness
SoftVibration sensitive equipment, i.e. Measuring, Testing, Optical & Laboratory equipment-50NBR50-10P210
ElasticActive shock & vibration, i.e. Injection Moulding and Packaging machines-70NBR70-10P210
Very StiffVery stiff with damping, i.e. Lathes, Grinders and Transfer machines-90SG10-P210

Load Capacities & Dimensions

Part refMax Load for Av Pads (Kg) -50Max Load for Av Pads (Kg) -70Max Load for Av Pads (Kg) -90Base D (mm)Base H1 (mm)Base materialTilt in all directions
060*1503004007025Cast Iron 250
080*2505008009025Cast Iron 250
100*4008001,20011025Cast Iron 250
120*5501,1001,70013027Cast Iron 250
130*6501,3002,00014027Cast Iron 250
170*1,1002,2003,400018027Cast Iron 250
JMSP-50-70-80DH1--
60*1503004006025Stainless Steel 304
80*2505008008025Stainless Steel 304

Pendulum Screw Dimensions

PSP = Bright zinc plated mild steel pendulum screws (with 2x Hex nuts & 2x Washers)
PSS = Stainless steel 304 pendulum screws (with 2x hex Nuts & 2x Washers)

Screw TypeSize & PitchSpanner (A/F)H2 (mm)H3 Length (mm)H3 Length (mm)H3 Length (mm)
PSP or PSSM10x1.5172194--
PSP or PSSM12x1.75192390140-
PSP or PSSM16x2.0242590140-
PSP or PSSM20x2.5303290140-
PSP or PSSM24x3.01923-150200

Farrat Jackmount Accessories Range

Mounting sketch of a Farrat Jackmount with screw assembly

Farrat Bolt-On Screw Assemblies

Screw Assemblies are offered as an option for the Bolt-On Jackmount.
Material: Zinc plated mild steel.
Alternative screw lengths available on request.

Screw Assemblies (SA)

Size & PitchS (mm)H (mm)D (mm)T (mm)L: Avaliable (mm)
SA M10x1.581030580
SA M12x1.75810305100
SA M16x2.01110406150
SA M20x2.51310406180
SA M24x3.01810508180

Features & Benefits

  • Perfect for installing machinery
  • Enables excellent, stable seating on uneven floors
  • High vibration damping to improve machine performance, reduces machine wear and lower noise levels
  • Reduce shock transmission to and from the machine
  • Captive Jackmounts have a high friction grip so machines don’t move
  • Factory layout flexibility (no bolting down or grouting)

Machine Applications

 General machine tools, Scanning and X-ray machines, Conveyors, Lathes, Food, Drink and Pharmaceutical equipment, Transfer machines and Grinding machines.

Need help with your Application?

By their very nature, industrial machinery and equipment will generate shock and vibration which can affect the performance of the machine itself as well propagate through the ground to disturb operators, surroundings such as floors and foundations, building structures, offices and neighbouring residents and businesses etc.

Working closely with a trusted global network of industrial distributors and original equipment manufacturers, we have provided solutions to all manner of industrial applications, from full automotive production lines to individual machine tools and HVAC equipment, power presses, roll grinders and printing presses.

To find out which Farrat solution is most suitable to your machine, Click Here to view our Industrial Application Guides.


Alternately, our application engineers will be glad to recommend you the optimum levelling solution for your machine application. Complete the form below to submit a technical enquiry to our team.

Download Farrat Industrial Application Guides

Enquiries & Quotations