Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-30B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-30B 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 ACQJ32X125-30B
The ACQJ32X125-30B is a double-acting JIS compact cylinder with a 125mm full stroke and a male-thread (M14x1.5) piston rod. An external M12x1.25 threaded stop and lock nut limits the extend end position, providing a usable extend range of 95 to 125mm. The retract stroke remains completely unaffected. This 125mm stroke exceeds the 100mm standard maximum for a 32mm bore, making it a long-stroke made-to-order variant.
Because the piston area is unchanged, the output force is identical to a standard ACQ of this bore. The push force is 402.1N and pull is 301.6N at 0.5MPa. It features a fixed NBR elastomer bumper at each end for end-of-stroke deceleration, plus sensor grooves on the body, though this specific SKU ships without a magnet.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-30B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-30B |
|---|---|
| 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 ACQJ32X125-30B
| 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 ACQJ32X125-30B Is Used
Machining Fixture Stops
Dial in the exact extend position for varying raw material blanks on a CNC machining fixture without machining new stop collars.
Assembly Line Changeover
Rapidly adjust the extend reach during product family changeovers on a modular assembly line to accommodate different part widths.
Prototype Positioning
Test multiple extend end-stroke positions on a packaging machine prototype to find the optimal pressing depth before finalizing the design.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-30B the Right Cylinder?
When sizing this 32mm bore, the smaller 25mm bore yields a 245.4N push at 0.5MPa, while the larger 40mm bore provides 628.3N. If your extend end position never needs tuning, a fixed-stroke ACQ32X125 is sufficient. For ordering, confirm the 125mm full stroke, the 30mm adjustable window, the male -B rod thread, and whether you need the -S magnet option for switch 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 ACQJ32X125-30B FAQ
The usable extend range is 95-125mm (125mm full stroke minus up to 30mm). The push force is 402.1N and pull is 301.6N at 0.5MPa, 562.9N push at 0.7MPa, with a maximum push of 82kgf at 1.0MPa. The retract stroke is unaffected.
An external M12x1.25 threaded stop with a lock nut limits the extend stroke length only, leaving force unchanged. Deceleration relies on a fixed NBR elastomer bumper, not an adjustable air cushion. A plain ACQ-type cylinder does not hold its load on air loss; for a fail-safe hold, install an external rod lock or pilot-operated check valve.
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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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