Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X25-20S
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X25-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø25mm bore and 25mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ25 mm
- Full stroke25 mm
- Port sizeM5×0.8
- Adjuster threadM10×1.25
About the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X25-20S
The AirTAC ACQJ25X25-20S is a double-acting JIS compact cylinder with a 25mm full stroke and a built-in magnet (-S). An external threaded stop with a lock nut limits the EXTEND end position, allowing the usable extend range to be fine-tuned from 5mm up to 25mm directly on your machine. The RETRACT stroke remains completely unaffected by this adjustment.
Because the piston area stays the same, the output force is identical to a standard ACQ of this bore, delivering 245.4N push and 188.9N pull at 0.5 MPa. It features a fixed elastomer bumper at each end for end-of-stroke deceleration and includes magnetic-switch grooves compatible with reed or electronic solid-state switches. The standard M5x0.8 port and M6x1.0 female rod-end thread simplify integration.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X25-20S Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X25-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø25 mm |
| Full stroke | 25 mm |
| Adjuster thread | M10×1.25 |
| 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 | M6×1.0 (F) / M10×1.25 (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 (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 189 N |
| 0.7 MPa | 344 N | — |
| Max (@1.0 MPa) | 50 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 ACQJ25X25-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 25 | Bore size in mm. |
| ×25 | 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 ACQJ25X25-20S Is Used
Multi-Variant Machining
Dial in the extend stop from 5 to 25mm to accommodate different part lengths on a single CNC fixture without machining new spacers.
Carton Forming Adjustments
Tune the end position on packaging lines to handle varying box sizes, relying on the 245.4N push force to fold flaps securely.
Prototype Positioning
Test multiple extend endpoints on an assembly rig, using the M10x1.25 adjuster thread to find the exact travel distance before finalizing the design.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X25-20S the Right Cylinder?
For lighter duties, the 20mm bore yields 157.1N push at 0.5 MPa, while the 32mm bore steps up to 402.1N if your application requires greater thrust. If the extend position never varies, a fixed-stroke ACQ cylinder is sufficient. When ordering, confirm the 25mm bore, 25mm full stroke, 20mm adjuster window, the -S magnet option, and the M6x1.0 female rod thread.
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 ACQJ25X25-20S FAQ
The usable extend range is 5-25mm (a 20mm adjustment window off the 25mm full stroke). Force is identical to a standard ACQ: 245.4N push and 188.9N pull at 0.5 MPa, 343.6N push at 0.7 MPa, and a maximum push of 50 kgf at 1.0 MPa.
No, the adjuster only changes the extend stroke length, not the piston area, so force remains unchanged. The RETRACT stroke is unaffected. The cylinder uses a fixed elastomer bumper for deceleration and the -S magnet works with reed or solid-state switches.
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Standard models usually ship in 3-4 days.
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Related AirTAC ACQJ Compact Cylinders
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