Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-30SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-30SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 300mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke300 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-30SB
The AirTAC ACQJ140X300-30SB is a big-bore JIS compact pneumatic cylinder featuring a double-acting single rod and an external extend stop. A threaded adjuster with a lock nut limits how far the rod travels outward, providing a usable extension range of 270-300mm. The retract movement remains fixed at the full 300mm. Because the piston area stays constant, the output force equals a standard ACQ of identical size.
This unit includes a built-in magnet for electronic or reed switches and a male M30x1.5 rod end that couples directly to your load. It uses a PT3/8 port and relies on fixed NBR elastomer bumpers at each end for deceleration rather than adjustable pneumatic cushions. Operating pressure spans 0.15-1.0 MPa, and the maximum standard stroke for this 140mm bore is 300mm.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-30SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-30SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 mm |
| Full stroke | 300 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 (Ø140mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 7697 N | 7295 N |
| 0.7 MPa | 10776 N | — |
| Max (@1.0 MPa) | 1570 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 ACQJ140X300-30SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | Bore size in mm. |
| ×300 | 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 ACQJ140X300-30SB Is Used
Heavy Press Tuning
Dial in the exact clamping reach on a heavy metal-forming press during setup. The external stop allows operators to shift the 270-300mm extension point without machining new spacers.
Automotive Welding Stops
Adjust the locator position on automotive welding lines when switching between vehicle chassis variants. The lock nut secures the new extend endpoint against high cycle impacts.
Palletizing Travel Limits
Modify the push distance on large-format palletizers to accommodate varying box dimensions. The 140mm bore provides the necessary thrust while the stop sets the precise push depth.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-30SB the Right Cylinder?
Choosing this 140mm bore yields a push force of 7696.9N at 0.5 MPa and a maximum push of 1570 kgf at 1.0 MPa. If your application requires less energy, the neighboring 125mm bore provides 6135.9N of push force at 0.5 MPa. If you need more power, the 160mm bore offers 10053.1N. Select this adjustable model only if your fixtures require frequent end-position tuning; otherwise, a fixed-stroke ACQ cylinder is sufficient. Confirm your ordering essentials: 140mm bore, 300mm full stroke, 30mm window, magnet (-S), and male rod thread (-B).
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 ACQJ140X300-30SB FAQ
At 0.5 MPa, the push force is 7696.9N and the pull force is 7294.8N. At 0.7 MPa, the push force is 10775.7N. The maximum push force is 1570 kgf at 1.0 MPa. The usable extend range is 270-300mm, meaning the 30mm window allows you to shorten the outward stroke from the full 300mm down to 270mm.
The adjuster is an external threaded stop with an M27x2.0 thread and a lock nut on the extend side. It limits how far the rod extends without changing the piston area, so the output force remains identical to a standard ACQ. The cylinder uses fixed NBR elastomer bumpers at each end for deceleration, not adjustable air cushions. The built-in magnet (-S) works with both reed and solid-state switches.
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Covers non-human-caused product damage.
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Related AirTAC ACQJ Compact Cylinders
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