Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X150-40S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X150-40S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 150mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke150 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X150-40S
The ACQJ125X150-40S is a big-bore JIS compact pneumatic cylinder featuring a double-acting single rod and an external extend stop. A threaded screw with a lock nut limits the outward travel, providing a usable extend range of 110 to 150 mm. You simply dial in the required end position directly on the equipment. The return stroke remains fixed at its standard length.
Because the adjuster only restricts travel length, the piston area stays the same, meaning output force is identical to a standard ACQ of this size. This 125 mm bore variant delivers 6135.9 N of push force at 0.5 MPa while utilizing a PT3/8 port and an M27x2.0 adjuster thread. It includes a built-in magnet for electronic or reed switches and relies on fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X150-40S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X150-40S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 150 mm |
| Adjuster thread | M27×2.0 |
| Port size | PT3/8 |
| 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 | M22×2.5 (F) / M30×1.5 (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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X150-40S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×150 | 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X150-40S Is Used
Press Tooling Changeover
Adapt forming dies quickly on heavy presses by dialing the outward stop between 110 and 150 mm to accommodate different material thicknesses without machining new spacers.
Large Fixture Positioning
Set precise clamping endpoints for oversized automotive welding fixtures, allowing operators to fine-tune the 125 mm bore thrust on the factory floor for varied subassembly widths.
Palletizer End Stops
Adjust the pusher rod extension on heavy-duty palletizing lines to handle varying pallet dimensions or product sizes, relying on the fixed NBR bumper to absorb stopping energy.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X150-40S the Right Cylinder?
Selecting this 125 mm bore unit means requiring substantial thrust, specifically 6135.9 N push and 5733.8 N pull at 0.5 MPa. If your application needs less force, dropping to a 100 mm bore reduces push to 3927.0 N but saves space, whereas stepping up to a 140 mm bore increases push to 7696.9 N. A fixed-stroke ACQ is sufficient if your extend endpoint never requires field adjustments. When ordering, confirm the 150 mm full stroke, 40 mm adjustment window, the S magnet option, and the default female M22x2.5 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X150-40S FAQ
This 125 mm bore cylinder generates a push force of 6135.9 N and a pull force of 5733.8 N at 0.5 MPa, with a push of 8590.3 N at 0.7 MPa, and a maximum push of 1251 kgf at 1.0 MPa. The full stroke is 150 mm, but the external M27x2.0 stop allows you to shorten the extend stroke by up to 40 mm, yielding a usable extend range of 110 to 150 mm.
No, the external threaded stop only limits how far the rod extends, so the output force remains identical to a standard ACQ of the same bore. The cylinder uses fixed elastomer bumpers rather than adjustable air cushions. Note that a plain compact cylinder will not hold a load if air pressure is lost; use an external rod lock or pilot-operated check valve for fail-safe holding.
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