Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40B 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 ACQJ40X250-40B
The ACQJ40X250-40B is a double-acting JIS compact cylinder built for applications requiring exact extend-position tuning. An external M12x1.25 threaded stop and lock nut limits the outward stroke, providing a usable extend range of 210-250mm from the 250mm full stroke. The retract movement remains completely unaffected. This long-stroke variant exceeds the 100mm standard maximum for bore 40, making it a made-to-order solution for extended reach.
Because the adjuster only restricts travel length, the internal piston area stays the same, meaning force output is identical to a standard ACQ of this bore. At 0.5 MPa it yields 628.3N push and 527.8N pull. The body features fixed NBR elastomer bumpers at each end for end-of-stroke deceleration rather than adjustable air cushions. Equipped with a male M14x1.5 rod-end thread (-B), it couples directly to your load, while the PT1/8 port manages pneumatic supply.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40B |
|---|---|
| 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 ACQJ40X250-40B
| 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 ACQJ40X250-40B Is Used
Long-Reach Machining Stops
Fine-tune the 210-250mm extend stop on a CNC lathe to accommodate varying raw material lengths without machining custom spacer blocks.
Variable Depth Carton Sealing
Adjust the rod extension on the fly to match different box depths on a packaging line, ensuring consistent flap folding pressure.
Product Changeover Diverter
Dial in the exact push distance for a conveyor sorting gate during format size changes, minimizing mechanical setup time between product runs.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40B the Right Cylinder?
When sizing this actuator, consider the adjacent bores: a size 32 provides 402.1N push at 0.5 MPa, while a size 50 offers 981.8N. The 40mm bore here hits a middle ground with 628.3N push and 879.6N at 0.7 MPa, peaking at 128 kgf maximum push. If your extend endpoint never varies, a fixed-stroke ACQ cylinder is simpler and more compact. If you require position detection, note this specific unit ships without a magnet; you must add the -S option for reed or solid-state switches to function in the body grooves. Confirm ordering essentials: 40mm bore, 250mm full stroke, 40mm window, male rod thread, and sensor needs.
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 ACQJ40X250-40B FAQ
This 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 full stroke is 250mm, but the external stop allows you to adjust the usable extend range from 210mm to 250mm (a 40mm window).
The external M12x1.25 threaded stop mechanically limits how far the rod extends without altering piston area, so force remains identical to a standard ACQ. It relies on fixed NBR elastomer bumpers for deceleration, not adjustable air cushions. A plain compact cylinder does not hold its load on air loss; for fail-safe holding, install an external rod lock or pilot-operated check valve.
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Related AirTAC ACQJ Compact Cylinders
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