Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-40SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-40SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø32mm bore and 125mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ32 mm
- Full stroke125 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-40SB
The AirTAC ACQJ32X125-40SB is a double-acting JIS compact cylinder featuring an external threaded stop and lock nut that limits the extend end position. This long-stroke made-to-order variant provides a full 125 mm of travel, allowing you to fine-tune the usable extend range from 85 mm up to 125 mm directly on your machine without swapping parts. The retract stroke remains completely unaffected by this adjustment.
Because the piston area stays constant, output force is identical to a standard ACQ of the same bore, delivering 402.1 N push and 301.6 N pull at 0.5 MPa. It includes a male M14x1.5 piston rod end for direct load coupling, a PT1/8 port, and an M12x1.25 adjuster thread. The unit relies on a fixed NBR elastomer bumper at each end for end-of-stroke deceleration and includes a built-in piston magnet compatible with reed or electronic solid-state switches.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-40SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-40SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø32 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 (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 302 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 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 ACQJ32X125-40SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 32 | 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 ACQJ32X125-40SB Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC machining center during setup, shortening the extend stroke from 125 mm down to 85 mm to accommodate varying raw casting dimensions.
Packaging Changeover
Rapidly reposition product deflectors or sealing heads on a packaging line by turning the external stop, accommodating different carton lengths without replacing the actuator.
Assembly Press Trials
Safely test and iterate end positions for pressing sub-components during automotive assembly, relying on the 562.9 N push force at 0.7 MPa to seat parts precisely.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-40SB the Right Cylinder?
When sizing this unit, consider the 32 mm bore yields 402.1 N push at 0.5 MPa; stepping down to a 25 mm bore provides 245.4 N, while moving up to a 40 mm bore offers 628.3 N. If your application never requires end-position changes, a fixed-stroke ACQ cylinder is simpler and suffices. To order this adjustable variant, confirm the 32 mm bore, 125 mm full stroke, 40 mm adjust window, and specify the S magnet and B male rod thread. Note that this 125 mm stroke exceeds the 100 mm standard maximum for this bore, classifying it as a long-stroke configuration.
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 ACQJ32X125-40SB FAQ
This 32 mm bore cylinder delivers a push force of 402.1 N and a pull force of 301.6 N at 0.5 MPa, 562.9 N push at 0.7 MPa, and a maximum push of 82 kgf at 1.0 MPa. The full stroke is 125 mm, but the external stop provides a 40 mm adjustment window, resulting in a usable extend range of 85-125 mm.
No, turning the M12x1.25 external stop only changes the extend stroke length, not the piston area, so force remains identical to a standard ACQ. Deceleration is handled by fixed NBR elastomer bumpers at both ends rather than an adjustable air cushion, so external shock absorbers may be needed for high-energy loads. The cylinder does not hold its load on air loss, requiring an external rod lock for fail-safe holding.
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Related AirTAC ACQJ Compact Cylinders
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