SJ Mod.A series 

Product description

Compact design screw jacks

• Acme screw jacks recommended for intermittent duty cycle
• Long life synthetic grease lubricated worm gear
• High precision worm gearbox, ZI involute profile
• Gearbox ratio from 1:4 to 1:36
• Monobloc gearbox housing, robust and compact shape
• Input speed up to 1.500 rpm
• Acme screw drive, travelling screw (Model A)
• Acme screw 1- or 2‑starts

SJ Mod.A Series acme screw jacks with travelling screw:

• 14 sizes standard available
• Acme screw from Ø 18 mm to Ø 160 mm
• Load capacity from 5 kN to 1.000 kN

Available accessories (*):

• Stroke length limit device (magnetic or inductive proximity)
• On request, execution with axial adjustment of the proximity sensors position or angular position
• 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)
• Screw jack housing fixing holes (threaded tapped holes on both housing fixing planes or through holes)
• Stop nut device to prevent the ball screw travelling out of the screw jack housing
• Protective tube
• Anti-turn device
• Trunnion mount
• Protective bellows
• Worm wheel rotation detector
• Safety nut
• Acme thread wear level check

More option upon request (*):

• Fixing attachments in stainless steel AISI 303, AISI 304, on request AISI 316
• Lubricants for high or low ambient temperature
• Lubricants suitable for food industry

(*) Always check with our technical support the feasibility of the required option and accessories