Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30B 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 ACQJ40X250-30B
The AirTAC ACQJ40X250-30B is a double-acting, single-rod JIS compact cylinder built for specialized long-stroke applications. It features a 40mm bore and a 250mm total stroke length. Because the 250mm length exceeds the 100mm standard maximum for this bore size, it is manufactured as a long-stroke, made-to-order variant. An external threaded stop with a lock nut allows you to limit the extend end position, providing a usable extend range of 220-250mm. The retract stroke remains completely unaffected.
By altering only the travel distance, the external adjuster leaves the piston area untouched, meaning the force output is identical to a standard ACQ of the same bore. At 0.5 MPa, it delivers 628.3N of push force and 527.8N of pull force. The body includes fixed elastomer bumpers at both ends for end-of-stroke deceleration and features sensor grooves, though this specific configuration ships without a magnet. It utilizes a PT1/8 port and a male M14x1.5 rod-end thread for direct load coupling.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30B |
|---|---|
| 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 ACQJ40X250-30B
| 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 ACQJ40X250-30B Is Used
Multi-Part Machining Fixtures
Dial in the extend stop from 220 to 250mm to accommodate different raw casting thicknesses on a single CNC machining center without machining custom spacers.
Packaging Changeover Stops
Adjust the external M12x1.25 threaded stop on-site to set new product rejection distances during format changes on a packaging conveyor line.
Assembly Press Trials
Probe and test various end positions for pressing bearings into housings, relying on the full 628.3N force output across the entire 30mm tuning window.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30B the Right Cylinder?
When sizing this actuator, consider the adjacent bores for force scaling: the 32mm variant provides 402.1N of push force at 0.5 MPa, while the 50mm variant offers 981.8N. If your extend end-position never varies, a fixed-stroke ACQ cylinder is sufficient and simpler. If your application requires position detection, select the -S magnet option, as this unit lacks one. Confirm your ordering essentials: 40mm bore, 250mm full stroke, 30mm adjustable window, male rod thread (-B), and PT1/8 porting. Because this is a 250mm long-stroke model, verify your space constraints and expect made-to-order fulfillment.
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 ACQJ40X250-30B FAQ
The usable extend range is 220-250mm (250mm full stroke minus the 30mm window). The retract stroke is unaffected. Force is identical to a standard ACQ: 628.3N push and 527.8N pull at 0.5 MPa, 879.6N push at 0.7 MPa, and a maximum push of 128kgf at 1.0 MPa.
The external stop uses an M12x1.25 threaded screw with a lock nut to mechanically limit the extend travel distance only; it does not alter the piston area or reduce the cylinder's force. A plain ACQ-type cylinder does not hold its load on air loss, and the fixed elastomer bumper only decelerates near the stroke end, so an external rod lock or pilot-operated check valve is recommended for fail-safe holding.
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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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