Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 50mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke50 mm
- Port sizeM5×0.8
- Adjuster threadM8×1.25
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50
The AirTAC ACQJ20X50-50 is a double-acting, single-rod JIS compact cylinder with an external threaded stop and lock nut that limits the extend end position. The full stroke is 50mm, but the external M8x1.25 adjuster allows you to shorten the forward travel by up to 50mm. This yields a usable extend range of 0-50mm, while the retract stroke remains completely unaffected. You can fine-tune the end position directly on the machine without swapping parts.
Because the piston area is unchanged, the output force is identical to a standard ACQ of this bore. At 0.5MPa, the push force is 157.1N and the pull force is 117.8N. The cylinder body features integrated magnetic-switch grooves, though this specific configuration ships without a magnet. Deceleration is handled by a fixed elastomer bumper at each end, rather than an adjustable air cushion.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50 Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 50 mm |
| Adjuster thread | M8×1.25 |
| Port size | M5×0.8 |
| 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 | M5×0.8 (F) / M8×1.25 (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.
Theoretical Output Force (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 118 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 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.
Model Code: Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | 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).
Where the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50 Is Used
Prototype Fixture Positioning
Dial in the exact clamping reach on a machining fixture during first-article trials without machining new spacers or swapping cylinders.
Carton Size Changeover
Quickly adapt a tucking arm on a packaging line to different box depths by turning the external stop to shift the extend endpoint.
Lab Dispenser Calibration
Set precise fluid-dispense distances on a laboratory bench by limiting forward travel, ensuring repeatable dosing without reprogramming a PLC.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50 the Right Cylinder?
If you need slightly less force, the adjacent bore 12 model provides 56.5N push at 0.5MPa, while the larger bore 25 version offers 245.4N push. If your extend end position never needs adjustment, a fixed-stroke ACQ20 cylinder is sufficient. When ordering this adjustable variant, confirm the 20mm bore, 50mm full stroke, 50mm window, and the default female M5x0.8 rod-end thread. Note that this unit lacks the -S magnet option.
Quick checklist
- ✓ Need on-machine end-position tuning?
- ✓ Full stroke and adjust window (mm)
- ✓ Force at your working pressure
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Lock the adjuster nut after setting the stop.
- check The stop limits the EXTEND stroke only.
- check Avoid side load on the short piston rod.
- check Installation by qualified personnel per AirTAC docs.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50 FAQ
The usable extend range is 0-50mm because the 50mm full stroke can be shortened by up to 50mm via the adjuster. Force is identical to a standard ACQ20: 157.1N push and 117.8N pull at 0.5MPa, 219.9N push at 0.7MPa, and a maximum push of 32kgf at 1.0MPa.
An external M8x1.25 threaded stop with a lock nut mechanically limits how far the rod extends, changing stroke length only without altering piston area or force. The retract stroke is unaffected. Fixed elastomer bumpers handle end-of-stroke deceleration, and while the body has sensor grooves, this model ships without a magnet.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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