
The AirTAC Airtac ACQJ80-100 Adjustable Compact Cylinder ACQJ80X50-50S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø80mm bore and 50mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
The AirTAC ACQJ80X50-50S is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend end position. With a 50mm full stroke and a 50mm adjustment window, the usable extend range runs from 0 up to 50mm. You can fine-tune the forward end position directly on the machine without swapping parts. The retract stroke remains completely unaffected.
Because the piston area stays the same, force is identical to a standard ACQ of this 80mm bore. The cylinder pushes 2513.2N and pulls 2267.8N at 0.5MPa, with a maximum push of 513kgf at 1.0MPa. It features a 25mm piston rod, PT3/8 port, and an M20x1.5 adjuster thread. Fixed NBR elastomer bumpers handle end-of-stroke deceleration, while the -S magnet enables compatibility with reed or solid-state switches.
| Model | Airtac ACQJ80-100 Adjustable Compact Cylinder ACQJ80X50-50S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø80 mm |
| Full stroke | 50 mm |
| Adjuster thread | M20×1.5 |
| Port size | PT3/8 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Rod thread | M16×2.0 (F) / M22×1.5 (B) |
Specifications follow the official AirTAC ACQJ datasheet. The adjustable stop shortens the EXTEND stroke only; the piston area — and therefore the force — is the same as a standard ACQ of this bore. Adjustable window options: 10/20/30/40/50/75/100 mm.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Force equals a standard ACQ of the same bore — the adjuster changes stroke length, not piston area. Actual usable force is lower due to friction; size with a safety margin.
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×50 | Full stroke length in mm. |
| -0 | Adjustable window in mm (extend stroke can be shortened by up to this). |
| S / B | Magnet (S) / male-thread rod (B); omit for none / female thread. |
Thread: PT standard (G / NPT available). Related: ACQ (fixed stroke), ACQD (double rod), TACQ (guided / non-rotating).
Quickly dial in new extend endpoints during packaging line format changes without machining new spacers or replacing the actuator.
Set exact clamping depths on welding fixtures by rotating the external M20x1.5 stop to find the optimal contact point before locking it down.
Accommodate varying workpiece heights in assembly stations by shortening the forward stroke from 50mm down to 0mm on the fly.
If you need less push at 0.5MPa, the 63mm bore yields 1558.6N; stepping up to the 100mm bore provides 3927.0N. A fixed-stroke ACQ is sufficient if your forward position never requires tweaking. When ordering, verify the 80mm bore, 50mm full stroke, 50mm window, the -S magnet, and the female M16x2.0 rod-end thread. Note that a plain ACQ-type does not hold its load on air loss; for a fail-safe hold, specify an external rod lock or pilot-operated check valve.
Quick checklist
The usable extend range is 0-50mm (50mm full stroke minus the 50mm window). Force is identical to a standard ACQ: push is 2513.2N and pull is 2267.8N at 0.5MPa, push is 3518.5N at 0.7MPa, and max push is 513kgf at 1.0MPa.
An external threaded stop with a lock nut limits the forward extension length only; the retract stroke is unaffected. The adjuster changes stroke length, not force. End-of-trroke deceleration is handled by fixed NBR elastomer bumpers, not adjustable air cushions.
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