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Power Jacks is a leading manufacturer of:

- worm gear screw jacks,
- electric linear actuators,
- spiral bevel gearboxes,
- planetary roller screws
- and mechanical jacks.

Products are supplied world-wide as individual units or as complete motion systems.
 
Product Line Up
Screw Jacks - Mechanical Actuators

As a leader in the manufacture of mechanical screw jacks, and with over two million products in the field, we guarantee quality, reliability, performance and value.

Our screw jacks come in a variety of series designed to meet the challenges of any application.

They range from the classic single face screw jack, one of the most widely used and popular screw jacks worldwide and proven in the most demanding linear motion applications, to our high performance machine screw jack that meet the ever-growing industrial demands placed upon our products.

 
5kN to 3500kN
 
C-Series
Metric Machine Screw Jack
  • Cubic Metric Machine Screw Jack
  • Capacities from 10kN to 100kN as Standard
  • Translating and Rotating Screw configurations
  • 2 Gear ratios and 2 screw leads as standard
  • Anti-backlash and anti-rotation (keyed) options
  • 6 mounting options including trunnion
E-Series
Metric Machine Screw Jack
  • Standard Performance Power Jack
  • Metric Single Face Machine Screw Jacks (mechanical actuators)
  • Capacities - 10kN to 1000 kN as standard
  • Translating and Rotating Screw in Upright and Inverted types
  • 2 Gear ratios and 1 screw lead as standard
  • Anti-backlash and anti-rotation (keyed) options
  • 6 mounting options including trunnion and double clevis
  • Special custom designs available
E-Series
Metric Machine Screw Jack
Stainless Steel
  • Standard Performance Power Jack
  • Metric Single Face Machine Screw Jacks (mechanical actuators)
  • Capacities - 10kN to 300kN as standard
  • Translating and Rotating Screw in Upright and Inverted types
  • 2 Gear ratios and 1 screw lead as standard
  • Anti-backlash and anti-rotation (keyed) options
  • 6 mounting options including trunnion and double clevis
  • Special custom designs available
E-Series
Metric Ball
Screw Jacks
  • Standard Performance Power Jack
  • Metric Single Face Ball Screw Jacks (mechanical actuators)
  • Capacities - 10kN to 500 kN as standard
  • Integral safety device
  • Translating and Rotating Screw in Upright and Inverted types
  • 2 Gear ratios and 2 screw leads as standard
  • Pre-loaded and Anti-rotation (keyed) options
  • 6 mounting options including trunnion and double clevis
  • Special custom designs available
 
S-Series
Metric Machine
Screw Jacks
  • High Performance Machine Screw Jack
  • 50% greater duty cycle capabilities than the standard worm gear machine screw jack
  • Capacities from 25kN to 200kN as Standard
  • Translating & Rotating Screw Configurations
  • Thermally Optimised Gearbox
  • Special Custom Designs
M-Series
Imperial (Inch)
Screw Jack
  • Standard Performance Power Jack
  • Imperial (Inch) Single Face Machine Screw Jacks (mechanical actuators)
  • Capacities - 0.25 Ton to 250 Ton as standard
  • Translating and Rotating Screw in Upright and inverted types
  • 2 Gear ratios and 1 screw lead as standard
  • Anti-backlash and anti-rotation (keyed) options
  • 6 mounting options including trunnion and double clevis
  • Special custom designs available
M-Series
Imperial (Inch)
Ball Screw Jack
Stainless Steel
  • Standard Performance Power Jack
  • Imperial (Inch) Single Face Machine Screw Jacks (mechanical actuators)
  • Capacities - 0.25 Ton to 100 Ton as standard
  • Translating and Rotating Screw in Upright and inverted types
  • 2 Gear ratios and 1 screw lead as standard
  • Anti-backlash and anti-rotation (keyed) options
  • 6 mounting options including trunnion and double clevis
  • Special custom designs available
M-Series
Imperial (Inch)
Ball Screw Jack
  • Standard Performance Power Jack
  • Imperial (Inch) Single Face Ball Screw Jacks (mechanical actuators)
  • Capacities - 0.5 Ton to 50 Ton as standard
  • Translating and Rotating Screw in Upright and Inverted types
  • 2 Gear ratios and 2 screw lead as standard
  • Pre-loaded and Anti-rotation (keyed) options
  • 6 mounting options including trunnion and double clevis
  • Special custom designs available
 
Bevel Gearboxes
 
Neeter Drive

The Neeter Drive bevel gearbox is an ultra compact unit and is available in 5 sizes with 5 gear ratios. Employing a central bearing housing support on the 1:1 and 1.5:1 gear ratios, and a small extended bearing housing on the input side of the bevel gearboxes with ratios 2:1 and above.
 
Bevel Gearbox
Neeter drive Range-N
  • Ultra Compact Bevel Gearbox Design
  • 2-way, 3-way & 4-way Configurations
  • Solid Shaft & Hollow Shaft
  • Gear Ratios: 1:1, 1.5:1, 2:1, 3:1 & 4:1
  • Torque Ratings up to 3000 Nm
  • Robust SG Iron Housing as Standard.
  • Special Custom Design Available
  • Special Gear Ratios Available
  • Popular models ex-stock
Jacking Systems
Screw jacks can be connected together in systems so that multiple units can be operated and controlled together. These jacking system arrangements or configurations can be built in many formats with the use of bevel gearboxes, motors, reduction gearboxes, drive shafts, couplings, plummer blocks and motion control devices.
  • H-Configuration
  • U-Configuration
  • T-Configuration
  • I-Configuration
 
Powergear
Series-P and X
  • High Torque Bevel Gearbox
  • 2-way, 3-way & 4-way Configurations
  • Solid Shaft & Hollow Shaft
  • Gear Ratios: 1:1 to 5:1
  • Torque Ratings from 25Nm to 5200Nm
  • Robust Spheroidal Graphite (SG) Iron Housing
  • Maintenance free
Series 2000
  • Compact Lightweight 'monobloc' Design
  • 4 Bolt Hole Mounting
  • 2-way, 3-way & 4-way Configurations
  • Solid Shaft & Hollow Shaft
  • Gear Ratios: 1:1, 2:1 & 3:1
  • Case-hardened and ground alloy-steel shafts
  • Can be mounted on end flanges
  • Sealed for Life, Maintenance free
Series 2000
Manual Disengage/
Reversing
  • Compact lightweight 'monobloc' Design
  • 4 Bolt Hole Mounting
  • 2-way, 3-way configurations
  • Manual disengage or reverse rotation of output drive shaft
  • 3 Positive control positions drive, neutral and reverse
  • Gear Ratios: 1:1, 2:1
  • Case-hardened and ground alloy-steel shafts
  • Can be mounted on end flanges
  • Sealed for Life, Maintenance free
Series 4000
  • Compact lightweight 'monobloc' Design
  • 3 Bolt Hole Mounting
  • 2-way and 3-way configurations
  • Solid Shaft
  • Gear Ratios: 1:1 & 2:1
  • Case-hardened and ground alloy-steel shafts
  • Can be mounted on end flanges
  • Sealed for Life, Maintenance free
 
Electric Linear Actuator
 
Rolram
  • High Load & Performance Linear Actuator
  • Dynamic Load Ratings up to 400kN
  • Linear Speeds up to 7000 mm/min
  • Roller Screw & Ball Screw Drives
  • 3-Phase AC, 1-Phase AC and DC Types
  • Special Custom Designs Available
EMA
  • Compact & Customised Linear Actuator
  • Dynamic Load Ratings up to 10kN
  • Linear Speeds up to 5500 mm/min
  • Machine Screw & Ball Screw
  • 3-Phase AC, 1-Phase AC & DC Types
  • Special Custom Designs Available
 
Planetary Roller Screw
 
Spiracon™

The Spiracon system consists of a multi-start screw with an involute thread form and multiple planetary rollers with annular grooves engaging with the screw. The rolling action results in a high efficiency mechanism, while the line contact and hardened and ground construction achieves a high dynamic load carrying capacity, combined with almost no axial backlash or wear and long life and low maintenance.
 
Spiracon™
  • Continous duty
  • High dynamic load capacity from 45 kN to 1200 kN
  • High efficiency
  • High positional accuracy
  • Long Life
  • Low maintenance
  • Low noise
 
 
System Components
 
Electric Motors
Power Jacks can supply electric motors for all applications whether AC or DC motors are required. We can also supply AC or DC motors with brakes; they are spring applied electrically released units, which provide the fail safe operating characteristics such that on interruption, or failure of power supply, brake will engage and arrest the load.
Reduction Gearboxes
Power Jacks offers a wide range of reduction gearboxes for actuator system building whether it be a single motorised actuator or several actuators mechanically linked. The gearboxes available are available as motorised units as standard, however the gearbox unit itself can be supplied. The most popular types of gearboxes are Helical Worm Gearboxes, In-line Helical and Parallel Shaft, other types are available on request.
Couplings & Driveshafts
Our 4 standard spider type jaw coupling with it's curved jaw design has no need for lubrication, making it a good low maintenence component. In a rugged aluminium and iron housing the coupling delivers smooth and silent operation in temperatures of -40° to +90°. There are three standard drive shaft sizes offered by Power Jacks with ends machined to suit actuator system couplings however drive shafts can be supplied to customer sizes with specific end designs.
Drive Components
Plummer blocks are to DIN736 with anti-friction bearings with tapered bores and adaptor sleeve. The housings are made of cast iron and are sealed with felt strips on both sides. The housings are designed to allow floating or located bearings. Hand Wheels are made from Polished aluminium casting and rotating handle and are Bored and keyed to BS4235 Part 1. Other types of hand wheels are available on request.
Motion Control
Our range of motion control devices allows you to safe guard the operation of you actuator system and ensures it operates within the specified parameters. Choose from Rotary, Proximity or Mechanical components.Most are ideally suited to Screw Jack or Linear Actuator mounting.
         

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