Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-75SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-75SB 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 ACQJ140X300-75SB
The AirTAC ACQJ140X300-75SB is a big-bore JIS compact double-acting cylinder with an external threaded stop and lock nut that limits the extend end position. You get a usable extend range of 225-300mm from the 300mm full stroke, while the retract stroke remains completely unaffected. Because the piston area stays the same, output force is identical to a standard ACQ of this bore.
This 140mm bore variant delivers 7696.9N push and 7294.8N pull at 0.5MPa, reaching 10775.7N push at 0.7MPa. It features a 32mm rod, PT3/8 port, and an M27x2.0 adjuster thread. The -SB configuration adds a piston magnet for reed or solid-state sensors and a male M30x1.5 rod end that couples directly to your load. Fixed NBR elastomer bumpers absorb impact at both ends.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-75SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-75SB |
|---|---|
| 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 ACQJ140X300-75SB
| 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 ACQJ140X300-75SB Is Used
Heavy Press Tonnage Setup
Dial in the exact 225-300mm extend position during heavy press commissioning to set precise tonnage without machining custom spacers.
Automotive Welding Changeover
Shift the extend stop rapidly for new fixture heights during automotive body-weld product changeovers on the line.
Large Die Trial Positions
Establish safe trial end positions for large stamping dies, tweaking the extend limit on the machine while testing clearances.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-75SB the Right Cylinder?
If you need slightly less thrust, the 100mm bore yields 3927.0N push at 0.5MPa, whereas moving up to the 160mm bore provides 10053.1N. Choose this 140mm model when your setup demands heavy force plus on-machine extend tuning. If the end position never varies, a fixed-stroke ACQ cylinder is sufficient. To order, confirm the 140mm bore, 300mm full stroke, 75mm window, -S magnet, and -B male rod 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 ACQJ140X300-75SB FAQ
It provides 7696.9N push and 7294.8N pull at 0.5MPa, 10775.7N push at 0.7MPa, and a maximum push of 1570kgf at 1.0MPa. The full stroke is 300mm with a 75mm window, giving a usable extend range of 225-300mm.
The M27x2.0 external threaded stop with lock nut mechanically limits how far the rod extends, shortening the extend stroke without changing the piston area, so force remains identical to a standard ACQ. The retract stroke is unaffected, and fixed NBR elastomer bumpers decelerate the load at both ends. For fail-safe load holding on air loss, add an external rod lock.
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Related AirTAC ACQJ Compact Cylinders
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