Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-50S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-50S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 50mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke50 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-50S
The AirTAC ACQJ140X50-50S is a double-acting, single-rod JIS compact cylinder engineered for large-scale tasks, featuring an external M27x2.0 threaded stop with a lock nut. This mechanism restricts the extend end position, providing a usable forward range of 0 to 50 mm from a 50 mm full stroke, while the retract stroke remains completely unaffected. You can fine-tune the endpoint right on the machine without swapping parts.
Because the piston area stays constant, output force equals a standard ACQ of this bore: 7696.9 N push and 7294.8 N pull at 0.5 MPa, reaching 1570 kgf max push at 1.0 MPa. The unit includes a -S piston magnet compatible with reed or solid-state switches, a fixed NBR elastomer bumper at each end for end-of-stroke deceleration, a PT3/8 port, and a 32 mm rod with an M22x2.5 female thread.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-50S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-50S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 mm |
| Full stroke | 50 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 ACQJ140X50-50S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | Bore size in mm. |
| ×50 | 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 ACQJ140X50-50S Is Used
Heavy Press Tuning
Dial in the exact 0-50 mm extend position on a large metal-forming press during setup, allowing quick adjustments for different blank thicknesses without changing cylinders.
Automated Welding Stops
Set precise end stops for heavy robotic welding fixtures so the 32 mm rod reaches the exact joint location, accommodating varied product geometries on the fly.
Pallet Positioning
Adjust the extend limit on large packaging line actuators to push pallets or heavy modules to varying end locations, ensuring correct alignment before downstream operations.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-50S the Right Cylinder?
When sizing this big-bore 140 mm unit, consider the adjacent bores: the 125 mm yields 6135.9 N push, and the 160 mm provides 10053.1 N push at 0.5 MPa. If your extend position never varies, a fixed-stroke ACQ cylinder is simpler and sufficient. For the ACQJ140X50-50S, confirm the 140 mm bore, 50 mm full stroke, 50 mm window, the -S magnet for sensing, and the female 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 ACQJ140X50-50S FAQ
At 0.5 MPa it delivers 7696.9 N push and 7294.8 N pull; at 0.7 MPa push is 10775.7 N, with a maximum push of 1570 kgf at 1.0 MPa. The 50 mm full extend stroke can be shortened by up to 50 mm, yielding a usable forward range of 0 to 50 mm. It features a 140 mm bore, PT3/8 port, 32 mm rod, M22x2.5 female rod-end thread, and an M27x2.0 external adjuster thread.
No, the adjuster only changes the extend length, not the piston area, so force remains identical to a standard ACQ. The cylinder uses fixed NBR elastomer bumpers at both ends for deceleration rather than adjustable air cushions. Note that a plain compact cylinder does not hold its load on air loss; for fail-safe holding, use an external rod lock or pilot-operated check valve.
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