Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-30
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-30 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 40mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke40 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 ACQJ20X40-30
The AirTAC ACQJ20X40-30 is a double-acting JIS compact cylinder featuring an external threaded stop and lock nut that limits the extend end position. You can fine-tune the usable extend range from 10 mm up to the full 40 mm directly on your equipment, while the retract stroke remains completely unaffected.
Because the adjuster only alters travel length and not the piston area, output force stays identical to a standard ACQ of this bore. The 20 mm bore delivers 157.1 N of push force at 0.5 MPa, running through an M5x0.8 port. It includes fixed elastomer TPU bumpers at both ends and body grooves ready for reed or solid-state switches, though this specific unit ships without a magnet.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-30 Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-30 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 40 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 ACQJ20X40-30
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×40 | 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 ACQJ20X40-30 Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC milling fixture by adjusting the extend stop between 10 and 40 mm to accommodate different part heights.
Packaging Changeover
Rapidly adapt a carton sealing head during product size changeovers by turning the external M8x1.25 adjuster rather than swapping out entire cylinders.
Forming Trial Positions
Test multiple bending depths on a light-duty metal forming station by limiting the extend stroke on the fly without replacing mechanical hard stops.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-30 the Right Cylinder?
If you need less push, the 16 mm bore yields 100.5 N at 0.5 MPa, whereas stepping up to the 25 mm bore provides 245.4 N. Choose this 20 mm bore if your application requires around 157.1 N of thrust. If your end position never varies, a fixed-stroke ACQ cylinder is sufficient. When ordering, confirm the 40 mm full stroke, the 30 mm adjustment window, the female M5x0.8 rod-end thread, and whether you need 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 ACQJ20X40-30 FAQ
This 20 mm bore cylinder provides 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. The full stroke is 40 mm with a 30 mm adjustment window, yielding a usable extend range of 10 to 40 mm.
The external M8x1.25 threaded stop with a lock nut mechanically limits how far the rod extends, shortening the stroke without changing the piston area, so force remains identical to a standard ACQ. Deceleration relies on fixed elastomer TPU bumpers at both ends; for high-speed loads, use an external shock absorber, and note this model ships without a sensor 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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