Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30SB 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 ACQJ40X250-30SB
The ACQJ40X250-30SB is a double-acting JIS compact cylinder with a 250mm stroke and a 30mm adjustable extend window, yielding a usable forward range of 220 to 250mm. An external threaded stop with a lock nut restricts how far the rod travels outward, letting you fine-tune the end position directly on the machine without swapping parts. The return stroke remains completely unaffected. This long-stroke made-to-order variant exceeds the 100mm standard maximum for this bore.
Because the piston area is unchanged, force output is identical to a standard ACQ of the same size, delivering 628.3N push and 527.8N pull at 0.5MPa. The unit includes a male M14x1.5 rod end for direct load coupling and a built-in magnet (-S) for position sensing. It uses fixed NBR elastomer bumpers at both ends for deceleration rather than adjustable air cushions.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30SB |
|---|---|
| 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 ACQJ40X250-30SB
| 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 ACQJ40X250-30SB Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC machining fixture during product-changeover, shortening the extend stroke up to 30mm without fabricating new stop collars.
Transfer Line Diverter
Adjust the pusher extension distance on a packaging conveyor to handle different carton widths on the fly while maintaining the full 250mm return stroke.
Prototype Press Testing
Experiment with trial end positions on a laboratory press setup, tweaking the outward travel to test material compression depths before finalizing the mechanical design.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30SB the Right Cylinder?
When sizing this actuator, consider the neighbouring bores: the ACQJ32 provides 402.1N push at 0.5MPa, while the ACQJ50 offers 981.8N. If your extend endpoint never varies, a fixed-stroke ACQ40 cylinder suffices. To order, confirm the 40mm bore, 250mm full stroke, 30mm window, the -S magnet for electronic or reed switches, and the -B male M14x1.5 rod thread. Note that a plain compact cylinder drifts on air loss; for fail-safe holding, add an external rod lock.
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 ACQJ40X250-30SB FAQ
It provides 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 full stroke is 250mm with a 30mm window, giving a usable extend range of 220-250mm. The retract stroke is unaffected.
The external M12x1.25 threaded stop with a lock nut limits the extend distance only, meaning force remains identical to a standard ACQ since piston area is unchanged. The cylinder uses fixed elastomer bumpers for deceleration, and the -S magnet works with reed or solid-state switches.
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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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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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