Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-100S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-100S 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 ACQJ40X250-100S
The ACQJ40X250-100S is a double-acting JIS compact cylinder featuring a 250mm total stroke and a built-in piston magnet. It is a made-to-order long-stroke variant, exceeding the standard 100mm maximum for this 40mm bore. An external M12x1.25 threaded stop with a lock nut lets you limit the extend travel, providing a usable forward range of 150 to 250mm. The retract distance remains completely unaffected.
Because the adjuster only restricts forward travel and not piston area, output matches a standard ACQ. You get 628.3N push and 527.8N pull at 0.5MPa, rising to 879.6N push at 0.7MPa. The unit uses fixed NBR elastomer bumpers at both ends for deceleration rather than adjustable air cushions, and the -S magnet supports both reed and solid-state sensors.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-100S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-100S |
|---|---|
| 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 ACQJ40X250-100S
| 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 ACQJ40X250-100S Is Used
Machining Fixture Stops
Dial in the exact 150-250mm clamping reach on machining centers during new product changeovers without machining new stop spacers.
Packaging Diverter Arms
Tune the extend length on packaging lines to handle varying carton widths on the fly using the external M12x1.25 adjuster.
Assembly Press Trial
Safely test multiple end positions on an assembly press to find the optimal engagement depth before finalizing the mechanical setup.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-100S the Right Cylinder?
If 879.6N push at 0.7MPa is insufficient, step up to the 50mm bore (1374.4N push); if lower force is acceptable, the 32mm bore yields 562.9N push at 0.7MPa. A fixed-stroke ACQ40 works fine if you never need to alter the end position. To order this cylinder, confirm the 40mm bore, 250mm total stroke, 100mm window, -S magnet, and the default female M8x1.25 rod end thread. Remember this compact body does not hold loads on air loss; add an external rod lock for fail-safe positioning.
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 ACQJ40X250-100S 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 usable extend range is 150-250mm (250mm full stroke minus the 100mm window).
No, the external threaded stop alters forward travel length only, leaving piston area and force identical to a standard ACQ. The cylinder uses fixed elastomer bumpers, not air cushions, and will drift if air pressure is lost, requiring an external rod lock for fail-safe holding.
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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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