Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-10
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-10 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 ACQJ40X125-10
The ACQJ40X125-10 is a double-acting JIS compact cylinder engineered as a long-stroke, made-to-order variant exceeding the standard 100mm maximum for this bore. It integrates an external threaded stop with a lock nut on the extend side, allowing you to fine-tune the end position directly on your equipment. The usable extend range spans 115-125mm, shortening the full 125mm stroke by up to 10mm, while the retract stroke remains completely unaffected.
Because the internal piston area stays constant, the output force is identical to a standard ACQ of the same bore. You get 628.3N push and 527.8N pull at 0.5MPa, with a maximum push capacity of 128kgf at 1.0MPa. The unit features a 16mm rod, PT1/8 port, fixed NBR elastomer bumpers for end-of-stroke deceleration, and machined sensor grooves. Note that this specific configuration ships without a magnet.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-10 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-10 |
|---|---|
| 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 ACQJ40X125-10
| 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 ACQJ40X125-10 Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC machining fixture during setup, accommodating varying raw part sizes without swapping out cylinder hardware.
Carton Forming Arms
Adjust the extend distance on packaging line carton erectors to handle different box dimensions quickly during product changeover.
Conveyor Diverters
Set precise sorting gate positions on a manufacturing conveyor belt to accommodate different product widths on the fly.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-10 the Right Cylinder?
For lower force requirements, stepping down to a 32mm bore yields 402.1N push at 0.5MPa, whereas scaling up to a 50mm bore provides 981.8N push. If your application never requires end-position adjustments, a fixed-stroke ACQ40 cylinder is a simpler choice. When ordering this adjustable variant, confirm the 40mm bore, 125mm full stroke, 10mm window, female M8x1.25 rod thread, and that no magnet (-S) 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 ACQJ40X125-10 FAQ
The usable extend range is 115-125mm (a 10mm window off the 125mm full stroke). Force is identical to a standard ACQ: 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 M12x1.25 external threaded stop with a lock nut limits the extend distance without changing the piston area, so force remains unchanged. Deceleration relies on fixed NBR elastomer bumpers, not adjustable air cushions. Also, a plain ACQ-type cylinder will not hold its load on air loss; use an external rod lock or pilot-operated check valve for fail-safe holding.
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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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