Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X250-20S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X250-20S 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 ACQJ32X250-20S
The ACQJ32X250-20S is a double-acting JIS compact cylinder built for applications requiring a precise, externally tuned extend endpoint. Featuring a 32mm bore and a 250mm total stroke, this made-to-order long-stroke variant utilizes an external M12x1.25 threaded stop with a lock nut. This mechanism allows you to shorten the forward stroke by up to 20mm, providing a usable extension range of 230 to 250mm without swapping components. The retract distance remains completely unaffected.
Because the adjustment solely limits piston travel, the output force remains identical to a standard ACQ of the same size. At 0.5 MPa, it delivers 402.1N of push and 301.6N of pull force. The unit includes a -S piston magnet compatible with both reed and solid-state electronic switches, and relies on fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration rather than adjustable air cushions.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X250-20S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X250-20S |
|---|---|
| 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 ACQJ32X250-20S
| 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 ACQJ32X250-20S Is Used
Machining Center Changeovers
Dial in the exact clamping reach on CNC fixtures during product family changeovers, utilizing the 230-250mm range to accommodate varying part widths without fabricating new spacers.
Variable Carton Sealing
Adjust the tamping arm position on a packaging line to match different box heights on the fly, ensuring consistent tape application across diverse product runs.
Bending Press Trial Stops
Set trial end positions on metal forming equipment to test bend angles accurately before committing to a final hard stop, preventing material waste during setup.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X250-20S the Right Cylinder?
Selecting this model is ideal when a setup demands a 250mm reach but the exact end position needs on-the-fly tuning within a 20mm window. If your application only requires a fixed 250mm extension, a standard ACQ series cylinder will suffice without the adjuster hardware. When sizing, note that stepping down to a 25mm bore yields 157.1N push at 0.5 MPa, while a 40mm bore provides 628.3N. Confirm your ordering essentials: 32mm bore, 250mm full stroke, 20mm window, -S magnet, and the default female M8x1.25 rod-end 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 ACQJ32X250-20S FAQ
This cylinder provides 402.1N push and 301.6N pull at 0.5 MPa, 562.9N push at 0.7 MPa, and a maximum push of 82 kgf at 1.0 MPa. The full stroke is 250mm, but the external adjuster allows you to fine-tune the usable extend range from 230mm to 250mm.
The external M12x1.25 threaded stop physically limits how far the rod extends, shortening the stroke without changing the piston area, so force remains identical to a standard ACQ. Deceleration is handled by fixed elastomer bumpers, not adjustable air cushions, so you may need external shock absorbers for high-speed loads.
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Related AirTAC ACQJ Compact Cylinders
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