Official distributorGROB linear drives from Maedler North America
Screw jacks, linear chains, electric actuators and lead screws, built by GROB in Germany for loads from 22 lb up to 220 tons. We size them for your application and support you from Bradenton, Florida.
Which drive fits your load?
Enter the load you need to move. We'll show the GROB drives that can handle it, starting with the one sized closest to your load.
The heaviest load per drive, in pounds or kilonewtons.
All 10 GROB drives, from light to heavy loads.
- Linear Actuator100 N–6 kN22–1,350 lbfLight loads and adjustments on 24 V
- MINI Actuator1–26 kN225–5,850 lbfCompact, washdown and outdoor use
- Linear Chain SK3–35 kN670–7,870 lbfLong push and pull strokes from a small space
- Electric Cylinder EZ3–40 kN670–9,000 lbfPrecise positioning, ready to connect
- TowerChain TC3–60 kN670–13,500 lbfVertical lifting over 4 m without guide rails
- High-Speed Screw Jack KH15–90 kN3,370–20,200 lbfFast cycles, over 300 mm/s (11.8 in/s)
- Spindle Actuator SA2.5–100 kN560–22,500 lbfReplacing hydraulic or pneumatic cylinders, IP68
- High-Performance Screw Jack HMC25–350 kN5,600–78,700 lbfHeavy loads with high duty cycles
- Cubic Screw Jack MJ/BJ2.5–500 kN560–112,400 lbfGeneral lifting, mounts on any side
- Classic Screw Jack MC5–2,000 kN1,120–449,600 lbfVery heavy loads, up to 200 t per jack
- Screw jack
- Linear chain
- Linear actuator
Need only a lead screw or ball screw? See screw drives. Not sure? Send us load, stroke and speed, and we'll size the drive for you, with the right safety margin.
The GROB product range
Every drive is configured from a modular system, so it fits your load, stroke and mounting.
Screw jacks
A worm gear drives a lead screw that lifts, lowers or pushes the load and holds it in position. Trapezoidal or ball screw, standing or rotating spindle, strokes up to 6,000 mm (236 in) as standard.
Cubic Screw Jack MJ/BJ
2.5–500 kN
560–112,400 lbf
- Cube housing, mounts on any side
- Quick to install
- Trapezoidal or ball screw
Technical details and documents
- 11 types in the MJ and BJ series, each as basic or traveling nut version
- Two reduction stages per size: normal and slow
- Strokes 0–6,000 mm (0–236 in) as standard, longer with multi-part spindles
- Input speed up to 1,500 rpm with grease, up to 3,000 rpm with flow grease or oil
- Housing in die-cast aluminum or gray cast iron, worm wheel in bronze
Operating instructions
3D CAD configurator
CAD model or data sheet
Classic Screw Jack MC
5–2,000 kN
1,120–449,600 lbf
- 14 sizes, up to 200 t per jack
- Base plate, mounts from above
- For the heaviest loads
Technical details and documents
- 14 sizes, up to 2,000 kN (449,600 lbf, about 200 t)
- Basic or traveling nut version, mounting versions E and F
- Integrated base plate, mounts from above
- Two reduction stages per size: normal and slow
- Strokes 0–6,000 mm (0–236 in) as standard
Operating instructions
3D CAD configurator
CAD model or data sheet
High-Performance Screw Jack HMC
25–350 kN
5,600–78,700 lbf
- Duty cycle up to 50%
- Oil-filled, with cooling fins
- Input speed up to 3,000 rpm
Technical details and documents
- 9 sizes from 25 kN to 350 kN
- Duty cycle up to 50%
- Input speed up to 3,000 rpm
- Oil-filled housing with cooling fins
- Example: HMC35 carries 350 kN at a 32:1 ratio
Operating instructions
3D CAD configurator
CAD model or data sheet
High-Speed Screw Jack KH
15–90 kN
3,370–20,200 lbf
- Over 300 mm/s (11.8 in/s) with ball screw
- Ratios 1:1, 2:1 and 3:1
- About 85% efficient with ball screw
Technical details and documents
- 3 sizes: KH090 up to 15 kN, KH140 up to 40 kN, KH230 up to 90 kN
- Bevel gear with ratios 1:1, 2:1 and 3:1
- Over 300 mm/s (11.8 in/s) stroke speed with ball screw
- Input speed up to 3,000 rpm
- About 85% efficiency with ball screw
Operating instructions
CAD model or data sheet
Spindle Actuator SA
2.5–100 kN
560–22,500 lbf
- Fully sealed, IP68
- Replaces hydraulic and pneumatic cylinders
- Needs only one power cable
Technical details and documents
- Up to 100 kN
- Fully sealed, IP68
- Trapezoidal screw (self-locking) or ball screw
- Stroke, speed and mounting to your requirements
- Only one power cable needed
CAD model or data sheet
Linear chains
A chain that locks into a rigid column to push or pull, then folds away compactly. Long strokes from a very small space.
Linear Chain SK
3–35 kN
670–7,870 lbf
- Strokes over 10 m (33 ft) with guide rails
- Up to 600 mm/s (23.6 in/s)
- Runs continuously at up to 550 °C (1,022 °F)
Technical details and documents
- 3–35 kN push and pull force
- Strokes over 10 m (33 ft) with guide rails
- Up to 600 mm/s (23.6 in/s) as standard
- Standard up to 180 °C (356 °F), continuous up to 550 °C (1,022 °F)
- Galvanized as standard, stainless on request; not self-locking, needs a motor brake
Operating instructions
3D CAD configurator
CAD model or data sheet
TowerChain TC
3–60 kN
670–13,500 lbf
- Over 4,000 mm (157 in) stroke without guide rails
- Made for vertical lifting
- Stage lifts, freight elevators, parking systems
Technical details and documents
- Up to 60 kN dynamic, 100 kN static
- Over 4,000 mm (157 in) stroke without guide rails
- U-shaped links form a rigid tower
- For stage lifts, freight elevators, parking systems and lifting platforms
Operating instructions
3D CAD configurator
CAD model or data sheet
Linear actuators
Complete electric actuators with motor, ready to install, for automation, food processing, outdoor use and anywhere hydraulics are not wanted.
MINI Actuator
1–26 kN
225–5,850 lbf
- Very short, IP65
- Stainless versions for washdown
- 24 V DC, 230 V AC or three-phase motors
Technical details and documents
- 5 sizes: MINI 0 (1 kN), MINI 01 (1.6 kN), MINI 1 (3.5 kN), MINI 2 (14.6 kN), MINI 3 (26 kN)
- Speeds up to 136 mm/s (5.4 in/s), depending on size
- Standard stroke 300–500 mm (12–20 in)
- IP65, stainless versions, lubricated for life
- Motors: 24 V DC, 1 × 230 V AC or 3 × 230/400 V AC
Operating instructions
3D CAD configurator
CAD model or data sheet
Electric Cylinder EZ
3–40 kN
670–9,000 lbf
- Precise positioning, plug and play
- Motor in line or parallel
- Brake, encoder and limit switches available
Technical details and documents
- 3 sizes from 3 kN to 40 kN
- Coaxial version: motor in line with the spindle
- Parallel version: motor beside the spindle for short installations
- Options: brake, rotary encoder, potentiometer, limit switches
Operating instructions
3D CAD configurator
CAD model or data sheet
Linear Actuator
100 N–6 kN
22–1,350 lbf
- 24 V drive
- Pre-assembled and ready to use
- For light loads and adjustments
Technical details and documents
- 100 N to 6 kN
- 24 V drive
- Pre-assembled and ready to use
- IP66 version available
Operating instructions
3D CAD configurator
CAD model or data sheet
Screw drives
Lead screws and ball screws as single components, made to your drawing.
Trapezoidal Lead Screws
TR10–TR300
thread sizes
- Rolled or whirled threads
- Made to your drawing
- Matching nuts and safety nuts
Technical details and documents
- Thread sizes TR10 to TR300
- Rolled or whirled threads
- Nuts: single flange nut, safety nut, square steel nut
- Made to your drawing
3D CAD configurator
CAD model or data sheet
High-Precision Ball Screws
Accuracy up to C1
efficiency up to 98%
- Long, calculable service life
- For precise positioning
- Complete spindle drives FK and EK
Technical details and documents
- Accuracy class up to C1
- Efficiency up to 98%
- Long, calculable service life
Operating instructions
3D CAD configurator
CAD model or data sheet
Accessories and assembly
The parts that turn single drives into a complete lifting system, plus custom assemblies built to your drawing and delivered ready to install.
Accessories
For complete systems
- Bevel gearboxes and connecting shafts
- Couplings, cardan shafts and support bearings
- Motor flanges, motors, handwheels, limit switches
Technical details and documents
- Bevel gearboxes to turn the drive by 90°
- Connecting shafts, cardan shafts and flexible shafts
- Couplings and support bearings
- Motor flanges, three-phase motors, handwheels and limit switches
Operating instructions
3D CAD configurator
CAD model or data sheet
Why electromechanical instead of hydraulic?
GROB drives move heavy loads precisely and safely, without a hydraulic power unit.
No oil, no hoses
No hydraulic power unit, no leaks, no oil changes. Grease-lubricated screw jacks need little maintenance, and the MINI is lubricated for life.
Holds the load
Trapezoidal-screw versions can be self-locking and hold the load at standstill, even during a power failure. A safety nut and wear monitoring are available.
Moves in sync
Jacks connected by shafts and bevel gearboxes move exactly together, driven by one motor. Electronic synchronization with encoders is also possible.
Uses less energy
Electromechanical drives only draw power while they move. GROB states up to 70% lower energy use than pneumatic and hydraulic systems.
Complete lifting systems. Connect two, four or more jacks with shafts and bevel gearboxes, and one motor lifts every corner together. GROB can also deliver the system fully assembled to your drawing.
Options and configurations
- Trapezoidal or ball screw
- Standing or rotating spindle
- Strokes up to 6,000 mm (236 in) standard, longer on request
- Safety nut and wear monitoring
- Bellows or spiral spindle covers
- Mechanical, magnetic or inductive limit switches
- Rotary encoders and potentiometers
- Motors, geared motors and brake motors
- Handwheel for manual operation
- Threaded end, clevis, ball joint, flange or pin spindle heads
- Stainless steel with H1 food-grade grease
- Oil-filled versions for ATEX zones and high speeds
- Painted or stainless versions for outdoor use
Where GROB drives work
Customers worldwide use GROB drives in applications like these.
- Stage and theaterStage lifts and platforms, including loads over 20 t (44,000 lb)
- Food processingStainless, washdown-ready actuators with food-grade lubricant
- IntralogisticsLifting tables, freight elevators, automated parking
- Automation and packagingFast, repeatable movements on production lines
- Heavy industryFurnace charging and high temperatures with linear chains
- Offshore and outdoorSealed, corrosion-protected drives for harsh conditions
- Rail maintenanceTilting work platforms and lifting systems in depots
- Machine buildingHeight adjustment, positioning and lifting axes
Manuals and CAD models
Operating instructions open right here on this page. CAD configurators open in their own window.
Operating instructions
Screw jacks
- Cubic Screw Jack, basic version
- Cubic Screw Jack, traveling nut version
- Classic Screw Jack, basic version
- Classic Screw Jack, traveling nut version
- High-Performance Screw Jack, basic version
- High-Performance Screw Jack, traveling nut version
- High-Speed Screw Jack, basic version
- High-Speed Screw Jack, traveling nut version
Linear chains and actuators
3D CAD configurators
Screw jacks
- Cubic Screw Jack, basic version
- Cubic Screw Jack, traveling nut version
- Classic Screw Jack, basic version F
- Classic Screw Jack, traveling nut version F
- Classic Screw Jack, basic version E
- Classic Screw Jack, traveling nut version E
- High-Performance Screw Jack, basic version
- High-Performance Screw Jack, traveling nut version
Linear chains and actuators
Questions about GROB drives
More answers on our FAQ page.
Is Maedler North America an official GROB distributor?
Yes. Maedler North America is the official distributor for GROB GmbH Antriebstechnik products. From Bradenton, Florida, we handle quotes, orders, delivery and support for GROB screw jacks, linear chains, linear actuators and screw drives. Call 941.803.0160 or email sales@maedlernorthamerica.com.
What is a screw jack, and when should I use one?
A screw jack turns rotary motion from a motor or handwheel into linear motion: a worm gear drives a lead screw that lifts, lowers or pushes a load. Use one when you need to move heavy loads precisely and hold them in position, for example to adjust a platform, lift a machine frame or replace a hydraulic cylinder.
Are GROB screw jacks self-locking?
Versions with a trapezoidal screw can be self-locking, so they hold the load at standstill without power. Ball-screw versions and linear chains are not self-locking and need a motor brake. For safety-critical applications, GROB offers brake motors, a safety nut and wear monitoring.
Can a GROB drive replace a hydraulic cylinder?
Yes. The Spindle Actuator SA is designed as a direct replacement for hydraulic and pneumatic cylinders, with IP68 protection and a single power cable. You no longer need a hydraulic power unit, hoses or oil changes, and GROB states up to 70% lower energy use.
Can several screw jacks lift together?
Yes. Screw jacks connected by shafts and bevel gearboxes move exactly in sync and can be driven by a single motor. Electronic synchronization with an encoder on each drive is also possible.
Are motors available for the U.S. power supply?
GROB supplies drives with a motor or with a motor flange for your own motor. Tell us your voltage and frequency with your inquiry.
How long does a GROB drive take?
We will get back to you with our quote as soon as we can. The delivery time is stated on each quote.
Request a quote
Send us these details and we'll size the right GROB drive for you. We will get back to you with our quote as soon as we can.
What we need for a quote
- Load, and whether it pushes or pulls
- Stroke length
- Speed
- Duty cycle (cycles per hour)
- Number of lifting points
- Mounting position
- Environment: temperature, washdown, outdoor
- Motor and power supply, e.g. 460 V, 60 Hz