Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-20B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-20B 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 ACQJ40X25-20B
The AirTAC ACQJ40X25-20B is a double-acting JIS compact cylinder with a 25 mm full stroke and a 20 mm external adjustment window. An external threaded stop with a lock nut restricts the extend end position, giving a usable extend range of 5 to 25 mm. The retract stroke remains completely unaffected by this mechanism. Because the piston area stays the same, force output is identical to a standard ACQ of this bore, yielding 628.3 N push and 527.8 N pull at 0.5 MPa.
This unit features a male M14x1.5 piston rod end for direct load coupling, a 16 mm rod diameter, and a PT1/8 port. 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 configuration ships without the internal magnet. Operating pressure spans 0.15 to 1.0 MPa, with a proof pressure of 1.5 MPa.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-20B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-20B |
|---|---|
| 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 ACQJ40X25-20B
| 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 ACQJ40X25-20B Is Used
Machining Fixture Clamping
Dial in the exact clamping reach on a machining fixture during product changeovers without machining new stop collars or swapping cylinders.
Transfer Line Diverter
Fine-tune the extend position of a transfer line diverter gate to accommodate varying package widths directly on the conveyor frame.
Carton Sealing Mechanism
Adjust the end-of-stroke contact point on a packaging machine flap folder to test and set the optimal folding depth for different carton sizes.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-20B the Right Cylinder?
When sizing this 40 mm bore actuator, stepping down to a 32 mm bore yields 402.1 N push at 0.5 MPa, while stepping up to a 50 mm bore provides 981.8 N push. If your application requires a constant extend distance and never needs on-the-fly tweaks, a fixed-stroke ACQ cylinder will suffice. To order, confirm the 40 mm bore, 25 mm full stroke, 20 mm adjustment window, the male M14x1.5 rod thread, and that no internal magnet is required.
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 ACQJ40X25-20B FAQ
The usable extend range is 5 to 25 mm. Force is identical to a standard ACQ: 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push at 0.7 MPa, and a maximum push of 128 kgf at 1.0 MPa.
An M12x1.25 threaded stop with a lock nut limits the extend distance without altering piston area, so force remains unchanged. The cylinder uses fixed elastomer bumpers for deceleration, not adjustable air cushions. Note that a plain ACQ-type cylinder does not hold its load on air loss; use 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.
Fast Dispatch
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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