Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X250-40SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X250-40SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø32mm bore and 250mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ32 mm
- Full stroke250 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X250-40SB
The AirTAC ACQJ32X250-40SB is a double-acting, single-rod JIS compact cylinder built for specialized long-stroke applications. As a made-to-order variant, its 250mm stroke exceeds the standard 100mm maximum for a 32mm bore, extending up to the 300mm long-stroke limit. Equipped with a male M14x1.5 rod-end thread (-B) and a built-in piston magnet (-S), it couples directly to your load and supports position sensing. An external M12x1.25 threaded stop with a lock nut limits the extend end position. The usable extend range is 210-250mm, while the retract stroke remains completely unaffected.
Because the adjuster only alters stroke length and not the piston area, the output force is identical to a standard ACQ of this bore. At 0.5 MPa, it delivers 402.1N of push force and 301.6N of pull force, reaching 562.9N at 0.7 MPa with a maximum push capacity of 82 kgf at 1.0 MPa. The cylinder uses a PT1/8 port and relies on a fixed NBR elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion. For fail-safe load holding during air loss, an external rod lock or pilot-operated check valve is required, as a standard compact cylinder will drift when valve pressure is centred.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X250-40SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X250-40SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø32 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 (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 302 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 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 ACQJ32X250-40SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 32 | 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 ACQJ32X250-40SB Is Used
Long-Reach Machining Stops
Dial in the exact 210-250mm extend position on a CNC fixture without machining new spacers, ensuring precise material clamping across varying part lengths.
Product Changeover Diverter
Quickly reposition a packaging line diverter arm during product changeover by adjusting the external stop, accommodating different carton widths on the fly.
Trial End-Position Setup
Safely test end positions on automated assembly machinery by starting with a shorter extend stroke and gradually extending to the full 250mm reach to verify tool clearance.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X250-40SB the Right Cylinder?
Select this 32mm bore model when your setup requires a 250mm total stroke with on-machine extend tuning. If your application only needs a fixed 250mm reach, a standard ACQ cylinder suffices without the external adjuster assembly. Sizing up to a 40mm bore increases the 0.5 MPa push force to 628.3N, whereas sizing down to a 25mm bore drops it to 245.4N. Confirm your ordering essentials: 32mm bore, 250mm full stroke, 40mm adjustable window, male rod thread (-B), and magnet (-S). Note that for high-speed or high-energy cycles, you should add an external shock absorber or slow the approach speed, since the fixed bumper alone may not adequately dissipate the kinetic energy.
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 ACQJ32X250-40SB FAQ
This long-stroke cylinder has a 250mm full stroke with a 40mm adjustable window, allowing the extend range to be set between 210-250mm. Force is identical to a standard ACQ: push is 402.1N and pull is 301.6N at 0.5 MPa, push is 562.9N at 0.7 MPa, and max push is 82 kgf at 1.0 MPa. The retract stroke is unaffected.
An external M12x1.25 threaded stop with a lock nut mechanically limits the extend distance without altering the piston area or force. The cylinder uses a fixed NBR elastomer bumper for deceleration, not an adjustable air cushion. It will not hold a load if air is lost or the valve is centred; for fail-safe holding, use an external rod lock or pilot-operated check valve.
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Related AirTAC ACQJ Compact Cylinders
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