Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-50S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-50S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 125mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke125 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-50S
The AirTAC ACQJ40X125-50S is a double-acting JIS compact cylinder with an external stroke adjuster. A threaded stop and lock nut on the rod-end side restricts how far the piston extends, yielding a usable extend range of 75 to 125 mm. The retract stroke remains completely unaffected. This unit includes a built-in piston magnet for position sensing.
Because the internal piston area is unaltered, output force equals a standard ACQ of identical bore. The 125 mm stroke exceeds the 100 mm standard maximum for this bore, making it a long-stroke made-to-order variant. It pushes 628.3 N at 0.5 MPa and features a fixed NBR elastomer bumper at each end to absorb impact energy.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-50S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-50S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 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 (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 ACQJ40X125-50S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | 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 ACQJ40X125-50S Is Used
Machining Fixture Clamping
Dial in exact clamping pressure on varying part heights without swapping cylinders, utilizing the 50 mm extend window for rapid setup changes.
Product Changeover Diverter
Adjust the extend stop on a packaging line diverter to accommodate new carton lengths quickly, ensuring precise positioning without hardware alterations.
Assembly Press Positioning
Test multiple insertion depths on an electronic assembly press by turning the external M12x1.25 adjuster screw, locking the exact end point with the nut.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-50S the Right Cylinder?
When sizing, note the 40 mm bore yields 628.3 N push at 0.5 MPa, sitting between the 32 mm (402.1 N) and 50 mm (981.8 N) options. If your application never requires end-position tuning, a fixed-stroke ACQ cylinder suffices. To order this adjustable version, confirm the 40 mm bore, 125 mm full stroke, 50 mm adjustment window, the -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 ACQJ40X125-50S FAQ
It delivers 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push at 0.7 MPa, and a maximum push of 128 kgf at 1.0 MPa. The full stroke is 125 mm, and the external adjuster allows the extend stroke to be shortened by up to 50 mm, giving a usable extend range of 75-125 mm.
The external threaded stop limits only the extend length, so force remains identical to a standard ACQ. A fixed elastomer bumper decelerates the piston near stroke ends, but the cylinder will drift on air loss; for fail-safe holding, use an external rod lock. The -S magnet works with reed or solid-state switches.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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