Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-20
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-20 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 ACQJ20X40-20
The ACQJ20X40-20 is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend end position. You can tune the usable extend stroke anywhere from 20 mm up to the full 40 mm directly on the machine, while the retract stroke remains unaffected. Because the piston area stays the same, output force is identical to a standard ACQ of this 20 mm bore.
Operating pressure runs 0.15-1.0 MPa with a speed range of 30-500 mm/s. The body features fixed elastomer TPU bumpers at both ends for end-of-stroke deceleration rather than adjustable air cushions. It has a 10 mm piston rod, an M5x0.8 female rod-end thread, and an M8x1.25 external adjuster thread.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-20 Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-20 |
|---|---|
| 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 ACQJ20X40-20
| 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 ACQJ20X40-20 Is Used
Machining Fixture Clamps
Dial in the exact clamping extension on a machining fixture during setup without machining custom spacers or swapping cylinder bodies.
Product Changeover Stops
Adjust the extend position on packaging line stops to accommodate different carton lengths quickly during product changeovers.
Prototype Press Positions
Experiment with various pressing end positions on a test rig to find the optimal travel before finalizing a fixed-stroke design.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-20 the Right Cylinder?
If you need slightly less push force, stepping down to a 16 mm bore yields 100.5 N at 0.5 MPa, while stepping up to a 25 mm bore provides 245.4 N. If your extend endpoint never varies, a fixed-stroke ACQ20 cylinder is simpler and avoids the external stop. To order this adjustable version correctly, confirm the 20 mm bore, 40 mm full stroke, 20 mm adjustment window, female rod 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 ACQJ20X40-20 FAQ
It delivers 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 20 mm adjustment window, giving a usable extend range of 20-40 mm. The M5x0.8 port handles the air supply.
An external M8x1.25 threaded stop with a lock nut mechanically limits the extend distance, changing only the stroke length while keeping the force identical to a standard ACQ. End-of-travel deceleration relies on fixed elastomer TPU bumpers, not adjustable air cushions. Note that a plain cylinder does not hold its load on air loss; for fail-safe holding, use an external rod lock or pilot-operated check valve.
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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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