Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-40
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-40 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 ACQJ40X125-40
The AirTAC ACQJ40X125-40 is a double-acting JIS compact cylinder featuring an external extend-stop mechanism. A threaded rod with a lock nut permits precise on-machine end-position tuning, allowing the usable forward stroke to be set anywhere from 85 mm up to the full 125 mm. The return stroke remains completely unaffected by this adjustment.
Because the piston area stays constant, output force matches a standard ACQ bore 40 exactly, yielding 628.3 N push and 527.8 N pull at 0.5 MPa. This long-stroke variant exceeds the 100 mm standard maximum, making it a made-to-order item. It features a PT1/8 port, a 16 mm rod, fixed NBR elastomer bumpers at both ends, and sensor grooves ready for reed or solid-state switches.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-40 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-40 |
|---|---|
| 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 ACQJ40X125-40
| 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 ACQJ40X125-40 Is Used
Machining Fixture Stops
Dial in the exact 85-125 mm clamp extension on a CNC machining fixture without machining new spacer blocks during part changeovers.
Transfer Line Diverter
Fine-tune the pusher stroke length on a packaging transfer line to accommodate varying carton widths on the fly.
Assembly Press Positioning
Set precise lower-home positions for pressing sub-components, testing the travel limit safely before final lock-down.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-40 the Right Cylinder?
If 527.8 N pull at 0.5 MPa is insufficient, consider the next bore up (50 mm) which provides 981.8 N push force. Conversely, the 32 mm bore offers 402.1 N push if your load is lighter. If your application never requires altering the extend endpoint, a fixed-stroke ACQ40x125 will suffice and avoids the adjuster overhang. When ordering, confirm the 40 mm bore, 125 mm full stroke, 40 mm adjust window, female M8x1.25 rod end, 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 ACQJ40X125-40 FAQ
This cylinder provides 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. The full stroke is 125 mm, but the external M12x1.25 adjuster allows you to shorten the extend stroke by up to 40 mm, giving a usable extend range of 85-125 mm.
No, the external stop only changes the extend stroke length, not the piston area, so force remains identical to a standard ACQ. The cylinder uses fixed NBR elastomer bumpers for end-of-stroke deceleration, not adjustable air cushions. Note that it will not hold a load on air loss; for fail-safe holding, use an external rod lock or pilot-operated check valve.
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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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