Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30 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 ACQJ40X25-30
The AirTAC ACQJ40X25-30 is a double-acting JIS compact cylinder with a 40mm bore and a 25mm full stroke. An external threaded stop with a lock nut limits the extend end position, allowing you to fine-tune the usable extend range from 0 up to 25mm directly on the machine without swapping parts. The retract stroke remains unaffected. Because the piston area is unchanged, the output force is identical to a standard ACQ of this bore.
This unit features a 16mm piston rod, a PT1/8 port, and a female M8x1.25 rod-end thread. The adjuster utilizes an M12x1.25 thread. It includes fixed elastomer NBR bumpers at both ends for end-of-stroke deceleration rather than adjustable air cushions. The body retains magnetic-switch grooves, though this specific model ships without a magnet.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30 |
|---|---|
| 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 ACQJ40X25-30
| 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 ACQJ40X25-30 Is Used
Machining Fixture Stops
Dial in the exact clamping extend position on a CNC fixture during setup, allowing rapid accommodation of varying raw material thicknesses without machining new stop blocks.
Assembly Line Changeover
Quickly reconfigure the extend end position for a new product run on a conveyor sorting mechanism, using the external lock nut to secure the new stroke length.
Carton Forming Trials
Test and set the precise folding flap end position on a packaging machine, fine-tuning the extend stroke in small increments to perfect the seal.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30 the Right Cylinder?
If you need slightly less force, the 32mm bore variant provides 402.1N of push force at 0.5MPa, while stepping up to the 50mm bore yields 981.8N for heavier loads. A standard fixed-stroke ACQ40 cylinder is sufficient if your extend end position never requires adjustment. When ordering, confirm the 40mm bore, 25mm full stroke, 30mm adjustable window, female rod thread, and whether you need the -S magnet option for position 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30 FAQ
The usable extend range is 0-25mm (25mm full stroke minus the 30mm window), while the retract stroke is unaffected. Force is identical to a standard ACQ: push is 628.3N and pull is 527.8N at 0.5MPa, push is 879.6N at 0.7MPa, and maximum push is 128kgf at 1.0MPa.
An external M12x1.25 threaded stop with a lock nut limits the extend stroke length only, leaving the piston area and force unchanged. The cylinder uses fixed elastomer NBR bumpers at both ends rather than adjustable air cushions. Note that a plain ACQ-type does not hold its load on air loss; for a fail-safe hold, use an external rod lock or pilot-operated check valve.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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