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Servomech - SJ Model B travelling nut ball screw jack

  • Up to 70% duty cycle
  • Ball screw from 16 to 120mm
  • 5 to 400kN load capacity
  • 8 sizes available

Product description

Compact design screw jacks


Ball screw jacks recommended for intermittent duty cycle (up to 70%)

Long life synthetic grease lubricated worm gear

High precision worm gearbox, ZI involute profile

Gearbox ratio from 4:1 to 36:1

Monobloc gearbox housing, robust and compact shape

Input speed up to 1.500 rpm

Ball screw drive, travelling nut (Model B)


SJ BS Mod.B Series ball screw jacks with travelling nut:

11 sizes standard available

Ball screw from Ø 16 mm to Ø 140 mm

Load capacity from 5 kN to 800 kN


Available accessories:

Incremental or absolute encoder for positioning control

Prepared for IEC standard motors, AC or DC motors, and brushless servomotors (special motor flange adapter available upon request)

Protective bellows

Worm wheel rotation detector

Safety nut

Screw jack housing fixing holes (threaded tapped holes on both housing fixing planes or through holes)

Trunnion mount


More option upon request, application dependant:

Lubricants for high or low ambient temperature

Lubricants suitable for food industry

Part numbers

Parts Price Force max
5000 N
10000 N
25000 N
50000 N
100000 N
150000 N
200000 N
250000 N



Technical data

Duty cycle 70 %
Force max 5000 N
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