Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-30
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-30 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 125mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke125 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-30
The AirTAC ACQJ40X125-30 is a double-acting, JIS compact cylinder featuring a 125mm full stroke and a 30mm external adjustment window. An external threaded stop with a lock nut limits the extend end position, providing a usable forward range of 95 to 125mm without swapping components. The retract stroke remains completely unaffected by this mechanism. This unit is a long-stroke, made-to-order variant, as the 125mm travel exceeds the 100mm standard maximum for this 40mm bore size.
Because the adjustment only restricts forward travel, the piston area stays the same, meaning force is identical to a standard ACQ of this bore. You get 628.3N of push force and 527.8N of pull force at 0.5MPa, rising to 879.6N push at 0.7MPa, with a maximum push capacity of 128kgf at 1.0MPa. The body incorporates fixed elastomer bumpers at each end rather than adjustable pneumatic cushions, and includes magnetic-switch grooves, though this specific configuration ships without a piston magnet. Operating pressure spans 0.15 to 1.0MPa, utilizing a PT1/8 port and a 16mm rod with a female M8x1.25 end thread.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-30 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-30 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 125 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 ACQJ40X125-30
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×125 | 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 ACQJ40X125-30 Is Used
Machining Fixture Stops
Dial in the exact 95-125mm clamp extension on a CNC milling fixture to accommodate raw stock of varying widths without manufacturing new stop collars.
Carton Changeover Guides
Quickly reposition the extend end stop on a packaging line conveyor when transitioning between small and large corrugated box formats, saving setup time.
Press Trial Positions
Establish safe trial end positions on an assembly press during new product introduction, relying on the 628.3N push force to test component seating limits.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-30 the Right Cylinder?
When sizing this 40mm bore, dropping down to a 32mm bore reduces the 0.5MPa push force to 402.1N, while stepping up to a 50mm bore increases it to 981.8N. If your application never requires end-position tuning, a fixed-stroke ACQ cylinder will suffice and typically ships faster. For this adjustable model, confirm your ordering essentials: 40mm bore, 125mm full stroke, 30mm window, female rod thread, and whether you need the -S magnet option for sensor feedback. Note that a plain compact cylinder does not hold its load on air loss; for fail-safe vertical holding, specify an external rod lock or pilot-operated check valve.
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 ACQJ40X125-30 FAQ
The usable extend range is 95-125mm (a 125mm full stroke minus up to 30mm via the external stop). Force is identical to a standard ACQ 40mm bore: 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.
An external M12x1.25 threaded stop with a lock nut mechanically limits how far the rod extends; the retract stroke remains unaffected. The cylinder uses fixed NBR elastomer bumpers at each end rather than adjustable air cushions, so add an external shock absorber for high-energy loads. The body has sensor grooves, but this model ships without the -S magnet.
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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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Related AirTAC ACQJ Compact Cylinders
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