Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X120-30
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X120-30 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 120mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke120 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 ACQJ20X120-30
The AirTAC ACQJ20X120-30 is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend end position. You can fine-tune the usable extend range from 90 to 120 mm directly on your machinery without swapping parts, while the retract stroke remains completely unaffected. This unit carries a non-standard 120 mm full stroke, exceeding the 100 mm standard maximum for this 20 mm bore, making it a made-to-order item.
Because the piston area is unchanged by the adjuster, the output force is identical to a standard ACQ of the same bore. You get 157.1 N push and 117.8 N pull at 0.5 MPa, or 219.9 N push at 0.7 MPa, with a maximum push capacity of 32 kgf at 1.0 MPa. The body includes fixed elastomer bumpers for end-of-stroke deceleration and sensor grooves, though this specific configuration ships without the internal magnet.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X120-30 Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X120-30 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 120 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 ACQJ20X120-30
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×120 | 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 ACQJ20X120-30 Is Used
Tooling Changeovers
Dial in the extend stop from 90 to 120 mm during lathe or mill fixture swaps to accommodate varying part lengths without machining new spacers.
Carton Forming Stops
Set precise flap folding or sealing positions on packaging lines where box dimensions change frequently between production runs.
Prototype Positioning
Establish exact end-of-travel endpoints on test rigs and laboratory automation by threading the external stop in or out for trial runs.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X120-30 the Right Cylinder?
Comparing bore sizes: the smaller 16 mm bore provides 100.5 N push at 0.5 MPa, while the larger 25 mm bore yields 245.4 N. This 20 mm model fits neatly in the middle, supplying 157.1 N push. If your equipment requires a fixed 120 mm stroke without end-position tuning, a standard ACQ20X100 cylinder (max standard stroke) would not suffice, making this non-standard ACQJ variant the correct choice. When ordering, verify the 20 mm bore, 120 mm full stroke, 30 mm adjustable window, female rod-end thread, and confirm whether your application requires adding the S magnet option for sensing.
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 ACQJ20X120-30 FAQ
The usable extend range is 90-120 mm (a 120 mm full stroke shortened by up to a 30 mm window). Force is identical to a standard ACQ: 157.1 N push and 117.8 N pull at 0.5 MPa, 219.9 N push at 0.7 MPa, and a maximum push of 32 kgf at 1.0 MPa.
An M8x1.25 threaded stop with a lock nut limits the extend stroke length only, leaving retract unaffected and keeping force unchanged. The cylinder uses fixed elastomer bumpers, not adjustable air cushions, and a plain ACQ will drift on air loss, so an external rod lock is needed for fail-safe holding.
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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