Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-20S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-20S 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 ACQJ140X300-20S
The ACQJ140X300-20S is a double-acting JIS compact cylinder from AirTAC featuring a 140mm bore and a 300mm full stroke. An external threaded stop with a lock nut limits the extend end position, providing a usable forward range of 280 to 300mm. The retract stroke remains completely unaffected by this adjustment. Because the piston area is unchanged, the output force is identical to a standard ACQ of this size.
This big-bore variant delivers 7696.9N of push force at 0.5MPa and includes a built-in piston magnet (-S) for use with reed or electronic solid-state switches. It utilizes a PT3/8 port, a 32mm rod, and fixed elastomer NBR bumpers at each end for end-of-stroke deceleration rather than adjustable air cushions.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-20S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-20S |
|---|---|
| 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 ACQJ140X300-20S
| 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 ACQJ140X300-20S Is Used
Heavy Press Tonnage Setup
Dial in the exact 280-300mm extend position during heavy press commissioning without machining new spacer blocks.
Large Fixture Changeover
Adapt a 140mm bore assembly line station rapidly when swapping large product variants that need different end-stops.
Prototyping End Positions
Test trial end positions on a new 300mm stroke jig safely, relying on the fixed elastomer bumper for basic deceleration.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-20S the Right Cylinder?
If your application requires less push force at 0.5MPa, the 125mm bore yields 6135.9N, whereas the larger 160mm bore provides 10053.1N. A fixed-stroke ACQ cylinder is sufficient if your end position never varies. To order this adjustable model correctly, confirm the 140mm bore, 300mm full stroke, 20mm adjustment window, the -S magnet, 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 ACQJ140X300-20S FAQ
The usable extend range is 280-300mm (full 300mm stroke minus the 20mm window). Force is identical to a standard ACQ: push 7696.9N and pull 7294.8N at 0.5MPa, push 10775.7N at 0.7MPa, and a maximum push of 1570kgf at 1.0MPa.
The external M27x2.0 threaded adjuster with lock nut limits only the extend stroke; the retract stroke is unaffected. The adjuster changes stroke length only, so force remains unchanged. Fixed elastomer bumpers handle deceleration, though a plain ACQ-type will not hold its load on air loss without an external rod lock.
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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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