Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-50B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-50B 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 ACQJ32X125-50B
The AirTAC ACQJ32X125-50B is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend end position. It features a 50mm adjustment window, meaning the usable extend range runs from 75mm up to the full 125mm. The retract stroke remains completely unaffected. Because the piston area is unchanged, the output force is identical to a standard ACQ of this bore. This long-stroke variant exceeds the 100mm standard maximum for a 32mm bore and is supplied as a made-to-order unit.
It delivers 402.1N of push force and 301.6N of pull force at 0.5 MPa, with a maximum push capacity of 82 kgf at 1.0 MPa. The unit includes a male M14x1.5 piston rod end for direct load coupling, uses an M12x1.25 external adjuster thread, and operates on PT1/8 porting. Deceleration is handled by a fixed NBR elastomer bumper at each end, and while this specific model ships without a magnet, the body retains sensor grooves for adding reed or solid-state switches if needed later.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-50B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-50B |
|---|---|
| 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 ACQJ32X125-50B
| 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 ACQJ32X125-50B Is Used
Product Changeover Stops
Ideal for packaging lines running multiple carton sizes, allowing operators to dial in the extend end position precisely between 75 and 125mm without swapping out hardware.
Trial End Positions
Perfect for laboratory test fixtures where the exact extension point needs on-the-fly tuning to find the optimal contact distance before finalizing a machine setup.
Setup-Varying Fixtures
Useful in automated assembly stations that require frequent reconfiguration of end stops to accommodate varying part heights or clamping depths.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-50B the Right Cylinder?
When sizing this cylinder, consider the 25mm bore which yields 245.4N push at 0.5 MPa, or the 40mm bore which provides 628.3N push at 0.5 MPa. If your machine only requires a fixed extend position, a standard ACQ cylinder without the external stop will suffice. For this model, confirm the 32mm bore, 125mm full stroke, 50mm window, the male M14x1.5 rod thread, and the absence of a magnet when ordering. Remember that a plain ACQ-type cylinder does not hold its load on air loss or when a valve is centered; the rod will drift. For a fail-safe hold, specify an external rod lock or a pilot-operated check valve.
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 ACQJ32X125-50B FAQ
At 0.5 MPa it provides 402.1N push and 301.6N pull force, and 562.9N push at 0.7 MPa. The maximum push is 82 kgf at 1.0 MPa. The full stroke is 125mm, and with the 50mm window, the usable extend range is 75-125mm.
The M12x1.25 external threaded stop with a lock nut only changes the extend stroke length, leaving the retract stroke unaffected. The force remains identical to a standard ACQ because the piston area is unchanged. Deceleration is provided by a fixed NBR elastomer bumper, not an adjustable air cushion.
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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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Related AirTAC ACQJ Compact Cylinders
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