Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X80-40
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X80-40 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 80mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke80 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 ACQJ20X80-40
This double-acting single-rod JIS compact cylinder features an external M8x1.25 threaded stop with a lock nut to regulate the extend end position. You get a usable extension range of 40 to 80 mm, while the retract stroke remains completely unaffected. The piston area is unchanged, so output force stays identical to a standard ACQ equivalent.
Operating pressure spans 0.15 to 1.0 MPa with a speed range of 30-500 mm/s. The body incorporates fixed elastomer bumpers at each end for end-of-travel deceleration. Although this specific unit ships without a piston magnet, the integrated sensor grooves allow you to mount reed or solid-state switches when needed.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X80-40 Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X80-40 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 80 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 ACQJ20X80-40
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×80 | 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 ACQJ20X80-40 Is Used
Machining Fixture Stops
Dial in the exact 40-80 mm extend position for varying part sizes on a CNC machining fixture without machining new stop blocks.
Carton Changeover Pushers
Quickly reposition the extend end stop during product format changes on packaging lines to accommodate different box depths.
Assembly Press Trial
Safely test and fine-tune the end-of-stroke pressing distance on automated assembly equipment before finalizing the mechanical setup.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X80-40 the Right Cylinder?
If your setup only requires a fixed extend position, a standard ACQ20 cylinder will suffice and saves adjustment complexity. When sizing this 20 mm bore, stepping down to a 16 mm bore drops the 0.5 MPa push force to 100.5 N, whereas moving up to a 25 mm bore raises it to 245.4 N. To order correctly, confirm the 80 mm full stroke, the 40 mm adjustment window, the female M5x0.8 rod-end thread, and whether you need the -S magnet option for switch tracking.
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 ACQJ20X80-40 FAQ
This 20 mm bore cylinder 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 80 mm with a 40 mm adjustment window, giving a usable extend range of 40-80 mm.
No, the external M8x1.25 threaded stop only limits how far the rod extends, leaving the retract stroke completely unaffected. Because the piston area remains unchanged, the output force is identical to a standard ACQ cylinder. The unit relies on fixed elastomer bumpers for deceleration rather than adjustable air cushions.
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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