Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-20S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø32mm bore and 125mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ32 mm
- Full stroke125 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-20S
The AirTAC ACQJ32X125-20S is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend end position. You can fine-tune the extension travel on the machine from 105 mm up to the full 125 mm without swapping parts, while the retract stroke remains completely unaffected. This unit features a built-in piston magnet (-S) for use with reed or solid-state switches, a 16 mm piston rod, and a female M8x1.25 rod-end thread. Because the adjuster only alters travel length and not the piston area, the output force is identical to a standard ACQ of this 32 mm bore.
This variant is a made-to-order long-stroke configuration, as the 125 mm stroke exceeds the 100 mm standard maximum for this bore size, yet remains within the 300 mm extended range. Operating at 30-500 mm/s with PT1/8 ports, it incorporates fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration rather than adjustable air cushions. The external adjuster utilizes an M12x1.25 thread for precise positioning.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-20S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø32 mm |
| Full stroke | 125 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 ACQJ32X125-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×125 | 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 ACQJ32X125-20S Is Used
Machining Fixture Clamps
Dial in the exact clamping extension on a CNC fixture during product changeovers using the external stop, accommodating varying part thicknesses without disassembling the cylinder.
Carton Sealing Stops
Adjust the extend position on a packaging line to handle different box heights on the fly, ensuring the sealing head aligns perfectly without needing custom spacers.
Assembly Press Trial
Set trial end positions on an automated assembly press to test insertion depths safely before finalizing the mechanical hard stops for a new production run.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-20S the Right Cylinder?
When sizing this 32 mm bore unit, note it delivers 402.1 N push and 301.6 N pull at 0.5 MPa. If your application requires less force, stepping down to a 25 mm bore yields 245.4 N push, whereas stepping up to a 40 mm bore provides 628.3 N push. If the exact 125 mm extension is constantly required without variation, a fixed-stroke ACQ cylinder is a simpler choice. To order, confirm the 32 mm bore, 125 mm full stroke, 20 mm adjustment window, the -S magnet option, and the female M8x1.25 rod 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 ACQJ32X125-20S FAQ
The usable extend range is 105-125 mm (full 125 mm stroke minus the 20 mm window). The force is identical to a standard ACQ: 402.1 N push and 301.6 N pull at 0.5 MPa, 562.9 N push at 0.7 MPa, and a maximum push of 82 kgf at 1.0 MPa.
The external M12x1.25 threaded stop with lock nut limits only the extend stroke length; it does not change the piston area or force. The cylinder uses fixed NBR elastomer bumpers for deceleration, not adjustable air cushions. A plain ACQ-type cylinder will not hold its load on air loss, so an external rod lock or pilot-operated check valve is recommended 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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