Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-10SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-10SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 250mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke250 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-10SB
The ACQJ40X250-10SB is a double-acting JIS compact cylinder built for applications requiring exact extend positioning on the machine. It features a 40mm bore and a 250mm full stroke, making it a made-to-order long-stroke variant since the standard maximum for this bore is 100mm. An external M12x1.25 threaded stop and lock nut lets you fine-tune the extend travel within a 240 to 250mm usable range without swapping parts. The retract stroke remains completely unaffected.
Because the adjuster only limits travel, the piston area stays the same, meaning force is identical to a standard ACQ of this size. You get 628.3N push and 527.8N pull at 0.5MPa. This unit includes a male M14x1.5 rod end for direct load coupling, an integrated magnet for electronic or reed switches, and fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-10SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-10SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 250 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 ACQJ40X250-10SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 ACQJ40X250-10SB Is Used
Machining Center Clamping
Dial in the exact clamping depth on machining centers directly at the fixture, accommodating different part heights without machining custom spacers.
Packaging Diverter Stroke
Adjust the extend stop on packaging conveyor diverters to handle varying carton widths during rapid product changeovers.
Assembly Press Positioning
Set precise trial end positions on automated assembly presses to test insertion depths before finalizing the mechanical setup.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-10SB the Right Cylinder?
Selecting this model provides a 128kgf maximum push at 1.0MPa. If you need less force, stepping down to a 32mm bore yields a 402.1N push at 0.5MPa, while moving up to a 50mm bore provides 981.8N. A fixed-stroke ACQ cylinder is sufficient if your end position never requires adjustment. Confirm your ordering essentials: 40mm bore, 250mm full stroke, 10mm adjust window, S magnet, and B male rod thread. Note that on air loss, the rod drifts; use an external rod lock for fail-safe holding.
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 ACQJ40X250-10SB FAQ
This cylinder has a 40mm bore, a 250mm full stroke, and a 10mm adjustment window, giving a usable extend range of 240-250mm. It delivers 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.
The external M12x1.25 threaded stop with lock nut limits only the extend stroke length, so force remains identical to a standard ACQ. The cylinder uses fixed NBR elastomer bumpers at both ends for deceleration rather than adjustable air cushions, and the retract stroke is unaffected.
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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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