Servomech Acme Screw Jacks
Linear Actuators South Africa is the official South African partner for Servomech Italy, supplying industrial Acme screw jacks for lifting, positioning, machine building and automation applications.
Servomech Acme screw jacks convert rotary input motion into controlled linear movement through a precision Acme screw and worm gearbox system. They provide a robust and reliable solution for industrial applications requiring controlled push, pull, lifting or positioning movement.
The range consists of the high-efficiency MA Series and the compact heavy-load SJ Series, with load capacities ranging from 5 kN up to 1,000 kN.
Both ranges are available as Model A travelling-screw and Model B travelling-nut configurations. Servomech screw jacks can operate under push or pull loads and may be installed vertically, horizontally or at intermediate mounting angles.
Individual screw jacks can also be mechanically connected using drive shafts, couplings and bevel gearboxes to create synchronised multi-point lifting and positioning systems.
Servomech Acme Screw Jack Range
Explore the Servomech Acme screw jack range below. Select a series to view its technical specifications, available accessories and configuration options.
MA Mod.A Series
High-Efficiency Travelling Screw Jacks
High-efficiency Acme screw jacks designed for demanding industrial applications using a travelling-screw configuration.
- Configuration: Model A – travelling screw
- Load capacity: 5–350 kN
- Acme screw: Ø18–100 mm
- Standard sizes: 8
- Input speed: Up to 3,000 rpm
- Lubrication: Synthetic oil
MA Mod.B Series
High-Efficiency Travelling Nut Jacks
High-efficiency Acme screw jacks using a travelling-nut arrangement for demanding industrial lifting and positioning applications.
- Configuration: Model B – travelling nut
- Load capacity: 5–350 kN
- Acme screw: Ø18–100 mm
- Standard sizes: 8
- Input speed: Up to 3,000 rpm
- Lubrication: Synthetic oil
SJ Mod.A Series
Compact Heavy-Load Travelling Screw Jacks
Compact and robust industrial Acme screw jacks with travelling screw configuration and load capacities up to 1,000 kN.
- Configuration: Model A – travelling screw
- Load capacity: 5–1,000 kN
- Acme screw: Ø18–160 mm
- Standard sizes: 14
- Input speed: Up to 1,500 rpm
- Lubrication: Synthetic grease
SJ Mod.B Series
Compact Heavy-Load Travelling Nut Jacks
Compact heavy-load Acme screw jacks using a travelling-nut arrangement for industrial lifting and positioning applications.
- Configuration: Model B – travelling nut
- Load capacity: 5–1,000 kN
- Acme screw: Ø18–160 mm
- Standard sizes: 14
- Input speed: Up to 1,500 rpm
- Lubrication: Synthetic grease
MA Mod.A Series
High-Efficiency Acme Screw Jacks with Travelling Screw
The Servomech MA Mod.A Series is a high-efficiency Acme screw jack range designed for industrial lifting and positioning applications requiring a travelling-screw configuration.
In the Model A arrangement, the Acme screw moves axially through the screw-jack gearbox while the gearbox remains fixed.
The MA Series uses a high-precision worm gearbox with ZI involute profile, reduced angular backlash and long-life synthetic oil lubrication. The gearbox housing is designed for improved heat dissipation.
Technical Overview
- Configuration: Model A – travelling screw
- Standard sizes: 8
- Acme screw: Ø18 mm to Ø100 mm
- Load capacity: 5 kN to 350 kN
- Input speed: Up to 3,000 rpm
- Gearbox ratio: 1:4 to 1:32
- Acme screw: Standard 1- or 2-start
- Additional screw options: 3- or 4-start available upon request
- Lubrication: Long-life synthetic oil
- Operating cycle: Intermittent duty
Available Accessories
- Magnetic or inductive proximity stroke limit devices
- Incremental or absolute encoder for positioning control
- Preparation for IEC standard AC or DC motors
- Preparation for brushless servomotors
- Bronze guides
- Stop-nut device
- Protective tube
- Anti-turn device
- Trunnion mounting
- Protective bellows
- Worm-wheel rotation detector
- Safety nut
- Acme thread wear-level check
- Adjustable backlash
Options Available Upon Request
- AISI 303 or AISI 304 stainless steel fixing attachments
- AISI 316 stainless steel fixing attachments on request
- Lubricants for high or low ambient temperatures
- Lubricants suitable for food-industry applications
- Special motor flange adapters
Always confirm the feasibility of required options and accessories with Linear Actuators South Africa technical support.
MA Mod.B Series
High-Efficiency Acme Screw Jacks with Travelling Nut
The Servomech MA Mod.B Series provides the same high-efficiency MA screw-jack platform in a travelling-nut configuration.
In the Model B arrangement, the Acme screw rotates while remaining axially fixed and the nut travels along the screw to create linear movement.
The range uses a high-precision worm gearbox with ZI involute profile, reduced angular backlash and long-life synthetic oil lubrication.
Technical Overview
- Configuration: Model B – travelling nut
- Standard sizes: 8
- Acme screw: Ø18 mm to Ø100 mm
- Load capacity: 5 kN to 350 kN
- Input speed: Up to 3,000 rpm
- Gearbox ratio: 1:4 to 1:32
- Acme screw: Standard 1- or 2-start
- Additional screw options: 3- or 4-start available upon request
- Lubrication: Long-life synthetic oil
- Operating cycle: Intermittent duty
Available Accessories
- Incremental or absolute encoder for positioning control
- Preparation for IEC standard AC or DC motors
- Preparation for brushless servomotors
- Trunnion mounting
- Protective bellows
- Worm-wheel rotation detector
- Safety nut
- Acme thread wear-level check
- Adjustable backlash
Options Available Upon Request
- AISI 303 or AISI 304 stainless steel fixing attachments
- AISI 316 stainless steel fixing attachments on request
- Lubricants for high or low ambient temperatures
- Lubricants suitable for food-industry applications
- Special motor flange adapters
Always confirm the feasibility of required options and accessories with Linear Actuators South Africa technical support.
SJ Mod.A Series
Compact Acme Screw Jacks with Travelling Screw
The Servomech SJ Mod.A Series is a compact and robust Acme screw jack range designed for industrial applications requiring high load capacity and intermittent operation.
In the Model A arrangement, the Acme screw moves axially through the gearbox housing while the screw-jack gearbox remains fixed.
The SJ Series uses a monobloc gearbox housing, high-precision worm transmission and long-life synthetic grease lubrication.
Technical Overview
- Configuration: Model A – travelling screw
- Standard sizes: 14
- Acme screw: Ø18 mm to Ø160 mm
- Load capacity: 5 kN to 1,000 kN
- Input speed: Up to 1,500 rpm
- Gearbox ratio: 1:4 to 1:36
- Acme screw: 1- or 2-start
- Housing: Robust monobloc gearbox design
- Lubrication: Long-life synthetic grease
- Operating cycle: Intermittent duty
Available Accessories
- Magnetic or inductive proximity stroke limit devices
- Incremental or absolute encoder for positioning control
- Preparation for IEC standard AC or DC motors
- Preparation for brushless servomotors
- Threaded or through housing fixing-hole options
- Stop-nut device
- Protective tube
- Anti-turn device
- Trunnion mounting
- Protective bellows
- Worm-wheel rotation detector
- Safety nut
- Acme thread wear-level check
Options Available Upon Request
- AISI 303 or AISI 304 stainless steel fixing attachments
- AISI 316 stainless steel fixing attachments on request
- Lubricants for high or low ambient temperatures
- Lubricants suitable for food-industry applications
- Special motor flange adapters
Always confirm the feasibility of required options and accessories with Linear Actuators South Africa technical support.
SJ Mod.B Series
Compact Acme Screw Jacks with Travelling Nut
The Servomech SJ Mod.B Series provides the compact heavy-load SJ platform in a travelling-nut configuration.
In the Model B arrangement, the Acme screw rotates while remaining axially fixed and the travelling nut moves along the screw to produce linear motion.
The SJ Series combines a robust monobloc gearbox housing with a high-precision worm transmission and long-life synthetic grease lubrication.
Technical Overview
- Configuration: Model B – travelling nut
- Standard sizes: 14
- Acme screw: Ø18 mm to Ø160 mm
- Load capacity: 5 kN to 1,000 kN
- Input speed: Up to 1,500 rpm
- Gearbox ratio: 1:4 to 1:36
- Acme screw: 1- or 2-start
- Housing: Robust monobloc gearbox design
- Lubrication: Long-life synthetic grease
- Operating cycle: Intermittent duty
Available Accessories
- Incremental or absolute encoder for positioning control
- Preparation for IEC standard AC or DC motors
- Preparation for brushless servomotors
- Threaded or through housing fixing-hole options
- Trunnion mounting
- Protective bellows
- Safety nut
- Acme thread wear-level check
Options Available Upon Request
- AISI 303 or AISI 304 stainless steel fixing attachments
- AISI 316 stainless steel fixing attachments on request
- Lubricants for high or low ambient temperatures
- Lubricants suitable for food-industry applications
- Special motor flange adapters
Always confirm the feasibility of required options and accessories with Linear Actuators South Africa technical support.
Servomech Acme Screw Jack Technical Information
Detailed performance data, dimensions, screw combinations, ordering information and selection criteria are available in the official Servomech technical documentation.
Selecting the Correct Servomech Acme Screw Jack
Correct screw-jack selection requires consideration of the required load, stroke, linear speed, duty cycle, mounting orientation, screw length, operating environment and positioning requirements.
For compressive push loads, the Acme screw must also be checked for buckling. For rotating-screw Model B applications, critical screw speed and system geometry must be considered.
For multi-jack systems, the number of lifting points, drive arrangement, connecting shafts, couplings and bevel gearboxes should be evaluated as part of the complete system.
As the official South African partner for Servomech Italy, Linear Actuators South Africa can assist with selecting and configuring the appropriate Servomech Acme screw jack system for your application.
Contact us with your load, stroke, speed, duty cycle and application details for assistance with product selection.
These Linear Actuators are manufactured by Servomech Italy
Proudly provided by Linear Actuators South Africa (Pty) ltd
