Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 25mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke25 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30S
The AirTAC ACQJ40X25-30S is a double-acting JIS compact cylinder with a 40mm bore and 25mm full stroke. An external M12x1.25 threaded stop and lock nut restricts forward travel, yielding a usable extend span of 0-25mm. Retraction travel remains standard. Output force stays identical to a standard ACQ, delivering 628.3N push and 527.8N pull at 0.5MPa.
This unit includes a piston magnet (-S) compatible with reed or solid-state sensors. It features a fixed NBR elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion. Operating pressure spans 0.15-1.0MPa, and the Ø16mm rod uses a default female M8x1.25 end thread.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 25 mm |
| Adjuster thread | M12×1.25 |
| Port size | PT1/8 |
| 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 | M8×1.25 (F) / M14×1.5 (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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30S Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC machining fixture during part setup, using the external stop to accommodate varying raw material lengths without disassembling the cylinder.
Packaging Changeover
Rapidly reposition the sealing or folding head on a packaging line for different carton sizes by turning the lock nut, allowing quick product changeover on the same actuator.
Assembly Press Trials
Test multiple insertion depths on an automated assembly press by adjusting the extend limit on the fly, finding the optimal press-fit depth before finalizing the mechanical setup.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30S the Right Cylinder?
When sizing this 40mm bore actuator, note the adjacent 32mm option yields 402.1N push, while the 50mm option provides 981.8N at 0.5MPa. Choose this specific model if your fixture requires exact forward-position tweaking without swapping cylinders. A fixed-stroke ACQ suffices if your endpoint never varies. Confirm your build by specifying the 40mm bore, 25mm base stroke, 30mm adjust window, the -S magnet, and 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30S FAQ
This 40mm bore cylinder provides 628.3N push and 527.8N pull at 0.5MPa, 879.6N push at 0.7MPa, and a maximum push of 128kgf at 1.0MPa. The 30mm adjustment window on a 25mm full stroke allows a usable extend range of 0-25mm.
The M12x1.25 threaded stop only shortens the extend length; it does not alter piston area, so force remains identical to a standard ACQ. End damping is handled by a fixed elastomer bumper, not an adjustable air cushion. Note that a plain cylinder does not hold its load on air loss, requiring an external rod lock for fail-safe holding.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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