The GLA4000-S is a powerful 12V DC (direct current) linear actuator designed for heavy loads and many quality-critical applications. Each actuator is capable of providing up to 4000N (407kg, 897lbs) of pushing or pulling force at the rated voltage. The no-load travel speed at 12V is 11mm/s while at the full rated load the travel rate is 8mm/s.
This model is currently stocked in seven different stroke lengths (travel distances) of 50mm (2"), 100mm (4"), 150mm (6"), 200mm (8"), 300mm (12"), 400mm (15 3⁄4"), 500mm (19 11⁄16"). Other sizes can be made to-order, along with custom control and transmission options, please contact us for more information on these.
Read on below for detailed product information.
Each of these actuators is built to last with corrosion resistant materials used throughout the exterior, along with seals and a central rubber-surround ensuring that the actuator is splash-proof and suitable for most covered outdoor use (be aware that direct long-term water exposure should be avoided, the actuator should be covered to prevent rain passing over it). Both the front and rear mounting points are constructed from sturdy metal, unlike the plastic brackets used by some rival products. We also stock stainless steel mounting brackets suitable for this actuator.
The low noise output and smooth operation of this actuator make it perfect for powering adjustable beds, furniture, fold-out steps and similar automated features in and around the home. The larger sizes also lend themselves towards the likes of electric gates, ventilation windows and extendable structures.
The actuator comes with a 1.4m PVC insulated lead as standard (black external sleeve with two internal cores, one brown and one blue) with uncovered lead ends. An option is provided for a DC (barrel type) power connector to be added (2.1mm internal diameter, 5.5mm external) on a 200mm lead, bringing the total lead length to 1.6m. Allow for one extra working day to process your order if a connector option is added, since these are soldered and insulated to-order.
We are able to supply custom wiring and connectors upon request, please contact us with your requirements if interested.
Both ends of the actuator can be rotated by 90 degrees so that the motor points perpendicular to the two mounting pin axes, which can allow the actuator to fit into tight spaces where the motor would otherwise collide with the surroundings. The below picture shows an example actuator with both brackets rotated. If this change suits your installation you can either request this modification to be made in advance of ordering, or if you are careful it is possible simply using a large cross-head screwdriver (the extending rod-end must only be rotated by 90 degrees anti-clockwise maximum, and the four screws retaining the rear bracket must be replaced securely but not over-tightened).
To change the direction of travel simply swap the polarity of the DC power source to the two actuator leads (this may be achieved using hardware such as our rocker switch harness or GLA-CU-X3 remote control unit). By varying the input voltage between 0-12V DC it is possible to control the speed of the actuator. Reducing the voltage will also reduce load capacity (for example at 6V the actuator will have roughly half of the maximum load capacity at 12V).
This actuator is designed primarily for compression loads, it will typically work OK in tension up to the same rated maximum load, but it is more vulnerable to damage from overloading when in tension. Shock loads through the mounting points should be avoided (shock/impact loads may impart a force greater than the rated load through the actuator).
As with any DC motor the actuator may be run at a higher voltage than the nominal 12V DC however operation at higher voltages will invalidate the warranty as it creates an increased risk of premature failure.
Ensure that the control hardware and power source are capable of providing sufficient current for the loads you expect the actuator to experience. We cannot be held liable for damage caused to connected hardware due to inappropriate hardware selection.
A fuse, or other overload protection such as the GR-SENS current limiting switch, should be used to protect the actuator against stalling due to an overload, which can permanently damage the motor.
CAD models (STEP, IGS, Autodesk Fusion 360) of the actuator are available upon request. Contact us with the size(s) and file formats that you require and we'll attach the files in return.
Read on below for more product information.
|Motor:||Nominal 12V DC, up to 90W|
|No-load current:||3A (required to move, the actuator should not demand any current if it has reached an end limit point)|
|Maximum load:||4000N/407kg for supported (linear) loads. The maximum load should be reduced if the load is not supported in an axial direction, parallel to the movement of the actuator. Longer-travel actuators are affected to a greater extent by off-axis loads.|
|Current for max. load:||12.6A (do not apply power to the actuator if the load exceeds the maximum rating above, this would void the warranty and be likely to damage the gearbox, bearings or motor)|
|Maximum static load:||6000N (612kg) in compression. Maximum 4000N in tension.|
|Noise levels:||< 50dB under no-load|
< 55dB under full-load
|Maximum duty cycle:||30% (this is the maximum proportion of time that the actuator may be in operation for, up to 2minutes during any continuous stretch. The duty cycle should be reduced below 20% for average loads >2000N)|
|Life expectancy:||Nominal 30,000 strokes|
Please be aware that there may some variation in the operating performance from actuator to actuator, as a rule-of-thumb allow for a 5% difference above/below the given values. If you intend to use the actuators in sets of two or more driving the same assembly then you must ensure that the driven assembly is rigid enough to transfer forces between them effectively or else the output could twist and put excessive stress on the framework and actuators. If your structure is not rigid or needs to stay level throughout its travel (e.g. tabletop surfaces rising/falling level to the ground) then please get in contact to discuss automatic synchronising control options.
(click on image to expand)
|Installation length:||This is the distance from the front to rear mounting hole centres when the actuator is retracted.|
Add the stroke length to the installation length to get the fully extended hole-to-hole centre distance (for example this would be 600mm for the 200mm stroke).
Please be aware that some older versions of this actuator model had shorter installational lengths (-25mm) relative to the travel distances, but these sizes are no longer available.
|Mounting:||Two 10mm-bore holes. One at the end of the cylindrical piston rod, the other towards the rear of the gearbox housing. Both mounting points feature vertical slots to enable a variety of mounting methods. Both mounting points may be rotated by 90 degrees so that the motor points perpendicularly to where it would otherwise point, which is particularly useful for hatches, furniture and other space-limited installations. Tailor-made mounting brackets are available here.|
|Body material:||Aluminium piston-rod and main sleeve, plastic-enclosed steel motor housing, with toughened plastic gearbox surround. Zinc plated steel front and rear brackets.|
Enclosure rated to IP65, suitable for washing and short-term water exposure. If using outdoors shield actuator from direct rain.
|Operating temperature:||0°C ~ +40°C|
|Gearbox type:||Single-stage worm gear reduction|
|Limit switches:||Two limit switches are installed at the ends of travel which automatically stop travel at the fully retracted and extended positions. The internal circuit is as pictured below (click on image to expand):|
|Wire length:||1.4m (55")|
|Weight:||(with standard lead, no connector)|
If you have any queries about this item, including requests for bulk-pricing information, then please contact us.