Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30 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 ACQJ40X250-30
The ACQJ40X250-30 is a double-acting, single-rod JIS compact cylinder built as a long-stroke, made-to-order variant for bore 40, exceeding the 100mm standard maximum. It features an external threaded stop with a lock nut on the rod-end side that limits how far the rod extends. You can fine-tune the extend end position on the machine without swapping parts, yielding a usable extend range of 220-250mm (the full 250mm stroke minus up to a 30mm window). The retract stroke remains completely unaffected.
Because the piston area is unchanged, the force output is identical to a standard ACQ of this bore, delivering 628.3N push and 527.8N pull at 0.5MPa. The body incorporates fixed elastomer NBR bumpers at each end for end-of-stroke deceleration rather than adjustable air cushions. Sensor grooves are present on the body, though this specific configuration ships without a magnet. Operating pressure spans 0.15-1.0MPa, the PT1/8 port is standard, and the piston rod measures 16mm with an M8x1.25 female rod-end thread.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30 |
|---|---|
| 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 ACQJ40X250-30
| 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 ACQJ40X250-30 Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC machining fixture during product-changeover, using the external stop to shorten the extend stroke by up to 30mm for varying part heights.
Sorting Diverter Arms
Set up trial end positions for a pneumatic diverter arm on a packaging conveyor, allowing operators to tweak the 250mm extend limit on-site without replacing the cylinder.
Assembly Press Positioning
Adjust the extend end-stop on an automated assembly press to accommodate different stack heights or insertion depths, relying on the 628.3N push force at 0.5MPa.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30 the Right Cylinder?
When sizing this unit, consider the neighbouring bores: a 32mm bore yields 402.1N push at 0.5MPa, while a 50mm bore provides 981.8N push at 0.5MPa. This 40mm model is appropriate when your application requires roughly 628.3N of push force and a long 250mm travel distance with on-the-fly end-position tuning. If the exact 220-250mm extend position is fixed and never varies, a standard fixed-stroke ACQ cylinder will suffice. To order, confirm the 40mm bore, the 250mm full stroke, the 30mm adjuster window, the female rod thread, and whether a magnet is needed for sensors.
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 ACQJ40X250-30 FAQ
This cylinder 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 usable extend range is 220-250mm (a 250mm full stroke minus a 30mm adjustable window).
No, the external M12x1.25 threaded stop alters only the extend stroke length, not the piston area, so force remains identical to a standard ACQ. The cylinder uses fixed elastomer bumpers for deceleration, and this configuration ships without a sensor magnet.
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Related AirTAC ACQJ Compact Cylinders
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