HH-LA-U7 Up Close: 12,000 N of Heavy-Duty Force, Examined

Every actuator line has a top step — the model you pick when the standard heavy-duty unit is no longer enough. In the HyHaven range that step is the HH-LA-U7 (factory model JS-TGZ-U7): 12,000 N of push force, an IP66 sealed housing, and strokes up to 500 mm. This article takes the U7 apart on paper — what the headline numbers actually mean, what they demand from your power supply and mounting, and where this actuator earns its price over the models below it.

The force numbers, read properly

12,000 N of push is roughly 2,698 lbs of force — enough to lift or tilt loads that sit well beyond furniture and light machinery. For calibration inside our own range, it is twice the force grade of the popular 6,000 N class: this is the actuator for the hatch, platform or implement that a mid-range unit would strain against.

Self-locking force is 15,000 N — higher than the push rating, and on a heavy load that is the figure that matters most. When power is cut, the U7 holds position against up to 15,000 N without a brake or a powered controller keeping it there. A raised heavy hatch stays raised; a tilted load does not creep back down overnight. On equipment that parks loaded for days at a time, self-locking is not a convenience — it is the safety case.

Speed and current: the honest trade

The stocked gear runs 6.5 mm/s unloaded and 4.5 mm/s at full load. On a 500 mm stroke that is a deliberate, controlled travel of about two minutes at full load — the right behaviour for multi-hundred-kilo loads, where the point is control, not pace. If your application cycles light loads all day, a smaller actuator will feel livelier; the U7 is geared for weight.

Current draw is where heavy duty stops being a catalogue choice and becomes an installation requirement:

• Full load: 20A at 12V, 10.5A at 24V
• No load: 4.0A at 12V, 2.4A at 24V

Twenty amps is not a detail. The power supply, the cable run and every connector between them must be sized for the full-load figure, with headroom — an undersized supply is the most common cause of "weak" heavy actuators that are actually just starved. Our power supply sizing guide walks through the maths. It is also why many U7 installations choose 24V: the same mechanical work at roughly half the current, which means thinner cable and less voltage drop on long runs. Note that the actuator price is for the actuator alone — controllers are sold separately, so budget the control side as its own line.

Sealed for weather, rated for cold starts

The U7 is sealed to IP66: dust-tight, and protected against powerful water jets from any direction. That is a step above the IP65 models in our range and it changes where the actuator can live — permanently outdoors, in wash-down areas, on equipment that works in rain and dust rather than being sheltered from them.

The operating temperature range is −26°C to +60°C, so the same unit that works through a summer on exposed machinery also starts on a frosty morning without being brought indoors first. Built-in limit switches stop travel at both ends of the stroke, so the drive protects itself at the extremes without external sensors.

Fit: strokes, installation length, mounting

• Strokes from 2 to 19.7 inches (50–500 mm), in 12V and 24V — 20 stocked variants in total
• Installation (retracted) length = stroke + 200 mm: a 300 mm stroke unit closes down to 500 mm, which is the first number to check against your frame
• Mounting holes Ø13 mm at the ends — sized for the pins and brackets a 12,000 N load path deserves

As with any actuator, measure the closed space first and pick the stroke second; on heavy equipment the retracted length, not the force, is usually what rules a model in or out.

Where the U7 sits in the line

If the 6,000 N class covers your load with margin, it remains the economical choice — the U7 is twice that force grade, and you should not pay for force you never use. The step up makes sense when one of three things is true: the load genuinely needs five-figure newtons, the actuator must hold a heavy load unpowered for long periods (that 15,000 N self-lock), or the installation lives outdoors where IP66 earns its keep over IP65. For the full side-by-side picture, our HyHaven actuator comparison lays out every model in the range.

Typical work

• Heavy hatches and covers that must open against their own weight and stay open unpowered
• Agricultural and industrial equipment lifts, where dust, weather and vibration are the normal environment
• Heavy solar tracking and other slow, high-load positioning that runs outdoors year-round
• Lifting platforms and load-bearing adjustments where holding position matters as much as moving

The U7 starts at $399.99 and carries a 12-month warranty. The model is covered by a UDEM attestation of conformity for the LVD 2014/35/EU and EMC 2014/30/EU directives (the attestation covers factory models JS-TGZ-U1 through U12) — the certificate itself is on our certifications page, so your compliance team can read the original rather than our summary of it. Sizing a heavy application and unsure whether the U7 or the class below is the honest fit? Email your load, stroke and supply voltage to support@hyhavenstore.com — we would rather talk you down a size than sell you force you do not need.

FAQ

12V or 24V — which should I choose for the U7? Both deliver the same force and speed. 24V draws roughly half the current (10.5A vs 20A at full load), which makes cable sizing and voltage drop far easier on long runs; 12V suits existing 12V vehicle and battery systems if the supply and wiring are honestly rated for 20A.

Does the U7 need a brake to hold a load? No. Its self-locking force is 15,000 N — with power off, the actuator holds position mechanically up to that load. That is one of the main reasons to choose it for hatches and platforms that park loaded.

What controller does it need? Controllers are sold separately; the price is for the actuator alone. Match the controller's current rating to the full-load draw (20A at 12V, 10.5A at 24V) — if in doubt, send us your supply details before ordering and we will confirm the pairing.

How long is the longest version when closed? Retracted length is stroke + 200 mm, so the 500 mm stroke variant closes to 700 mm. Check that figure, and the Ø13 mm mounting holes, against your frame before choosing a stroke.

Is the U7 too much for a 6,000 N job? Probably, yes — and it costs more. Choose the U7 when the load, the holding requirement or the outdoor exposure calls for it; otherwise the smaller classes in our range do the same work for less money.