Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40S 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 ACQJ40X250-40S
The AirTAC ACQJ40X250-40S is a double-acting JIS compact cylinder with an external extend-stroke adjuster. It features a 250mm total stroke and a 40mm adjustment window, allowing you to set the effective extend range between 210mm and 250mm directly on the machine. Retraction travel remains fixed. This long-stroke variant exceeds the 100mm standard maximum for this bore size and is supplied as a made-to-order unit.
Because the piston area is unaltered, output force matches a standard ACQ exactly, yielding 628.3N push at 0.5MPa. The 16mm rod uses an M8x1.25 female end, while the external stopper utilizes an M12x1.25 thread. Fixed NBR elastomer bumpers absorb end-impact, and the included -S magnet pairs with reed or solid-state switches.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40S |
|---|---|
| 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 ACQJ40X250-40S
| 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 ACQJ40X250-40S Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC lathe loader between 210 and 250mm without machining new spacer plates.
Packaging Diverters
Adjust the pusher rod extension on a packaging line to handle varying carton depths during quick product changeovers.
Assembly Press Tonnage
Probe trial end positions on an electronic assembly press, fine-tuning the 40mm window to prevent over-travel.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40S the Right Cylinder?
For 0.5MPa push requirements, the 32mm bore yields 402.1N, while the 50mm bore provides 981.8N, making this 40mm unit at 628.3N the correct middle-ground choice. If your equipment never requires altering the end position, a fixed-stroke ACQ cylinder is simpler and more economical. When ordering this adjustable version, verify the 250mm total travel, the 40mm window, the -S magnet option, and the default female M8x1.25 rod thread.
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 ACQJ40X250-40S FAQ
The push force is 628.3N and pull is 527.8N at 0.5MPa, with a push of 879.6N at 0.7MPa, and a maximum push of 128kgf at 1.0MPa. The total stroke is 250mm, but the external stopper provides a 40mm window, making the usable extend range 210-250mm. Operating pressure is 0.15-1.0MPa.
An external M12x1.25 threaded stop with a lock nut limits the extend travel, shortening the stroke without changing the piston area, so force remains identical to a standard ACQ. Fixed NBR bumpers decelerate the load at the ends; they are not adjustable cushions. Note that a plain ACQ cylinder will not hold a load if air pressure drops, so an external rod lock is required for fail-safe holding.
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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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