Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-75
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-75 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 ACQJ40X250-75
The AirTAC ACQJ40X250-75 is a double-acting, single-rod JIS compact cylinder built for specialized long-stroke applications, featuring a 250mm total stroke that qualifies as a made-to-order variant beyond the standard 100mm maximum for this bore size. An external threaded stop with a lock nut restricts the extend end position, providing a usable forward travel range of 175 to 250mm. The return stroke remains fixed at its full length. Because the internal piston area is unaltered by the external adjuster, output force is identical to a standard ACQ of the same size.
At 0.5 MPa operating pressure, this 40mm bore unit generates 628.3N of push force and 527.8N of pull force, reaching 879.6N push at 0.7 MPa, with a maximum push capacity of 128 kgf at 1.0 MPa. The body incorporates fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration rather than adjustable air cushions. Integrated magnetic-switch grooves are present on the profile, though this specific configuration ships without a piston magnet. The 16mm diameter rod utilizes a female M8x1.25 thread end, and pneumatic supply connects via PT1/8 ports.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-75 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-75 |
|---|---|
| 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 ACQJ40X250-75
| 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 ACQJ40X250-75 Is Used
Extended-Reach Press Brakes
Dial in the bending depth on varied sheet metal gauges by tweaking the 175-250mm extend stop on the fly, avoiding parts changes during product changeover.
Long-Transfer Sorting Diverters
Accommodate oversized package profiles on a material handling line by adjusting the actuator's extended push position to alter the divert lane gap.
Multi-Size Pallet Positioning Stops
Set precise end-stop locations for different pallet lengths on an assembly conveyor, utilizing the full 250mm travel to capture wide format variations.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-75 the Right Cylinder?
When sizing this actuator, consider the neighboring bore options: the 32mm version yields a lower 402.1N push at 0.5 MPa, while the larger 50mm bore provides 981.8N push, making the 40mm an ideal middle ground for medium-duty tasks. If your machinery requires a fixed extend length that never varies, a standard ACQ cylinder without the external stop is sufficient. To order this long-stroke adjustable unit correctly, confirm the 40mm bore, 250mm full stroke, 75mm adjuster window, and specify if a male rod thread or piston magnet is needed for sensor tracking.
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 ACQJ40X250-75 FAQ
This 40mm bore cylinder provides 628.3N push and 527.8N pull at 0.5 MPa, 879.6N push at 0.7 MPa, and a maximum push of 128 kgf at 1.0 MPa. The usable extend range is 175 to 250mm, achieved by shortening the forward stroke up to the 75mm window. The retract stroke remains unaffected.
An external M12x1.25 threaded stop with a lock nut physically limits how far the rod extends, allowing on-machine position tuning without swapping parts. The adjustment alters only the travel length, meaning the output force remains identical to a standard ACQ of the same bore. The unit relies on fixed elastomer bumpers for deceleration rather than adjustable air cushions.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
Request a Quote for Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-75
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.