Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X75-20SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X75-20SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 75mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke75 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X75-20SB
The ACQJ140X75-20SB is a double-acting JIS compact cylinder featuring a 140mm bore and a 75mm full stroke. An external threaded stop with a lock nut restricts the rod extension, allowing you to dial in the extend end position from 55mm to 75mm without swapping parts. The retract movement remains completely unaffected by this mechanism. As a big-bore compact unit, it handles heavy loads within a space-efficient riveted body design.
Because the adjuster solely limits travel length, the piston area stays the same, meaning output force is identical to a standard ACQ of this size. You get 7696.9N push and 7294.8N pull at 0.5MPa. This SB configuration includes a male M30x1.5 rod end for direct load coupling and an internal piston magnet for position sensing. Deceleration relies on fixed NBR elastomer bumpers at both ends rather than adjustable air cushions.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X75-20SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X75-20SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 mm |
| Full stroke | 75 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 ACQJ140X75-20SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | Bore size in mm. |
| ×75 | 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 ACQJ140X75-20SB Is Used
Heavy Press Tonnage Setup
Dial in the exact 55 to 75mm extension on a large metalforming press to accommodate varying material thicknesses without machining new spacers.
Automated Pallet Changeover
Adjust the extend stop externally during product family changeovers on a machining center to hit different pallet engagement points rapidly.
Large Fixture Positioning
Trial-fit end positions on heavy welding fixtures, moving the rod stop in millimeter increments to locate large structural components accurately.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X75-20SB the Right Cylinder?
Selecting this 140mm bore actuator provides 10775.7N of thrust at 0.7MPa, stepping up considerably from the 6135.9N push force of a 125mm bore variant. If your application requires less than 55mm of extend travel, a fixed-stroke ACQ cylinder would be simpler, as this model is optimized for fine-tuning within its specific 20mm adjustment window. When ordering, verify the 75mm full stroke, 20mm window, PT3/8 port size, plus the required S magnet and B male 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 ACQJ140X75-20SB FAQ
This cylinder has a 140mm bore and a 75mm full stroke with a 20mm adjustable window, giving a usable extend range of 55-75mm. It delivers 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 external adjuster uses an M27x2.0 thread.
The external stop screw limits only the extend travel, leaving the retract stroke untouched. Force remains identical to a standard ACQ because the piston area is unchanged. The cylinder uses fixed elastomer bumpers for end-of-stroke deceleration. Note that it will not hold a load on air loss; for fail-safe load holding, install an external rod lock or pilot-operated check valve.
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Related AirTAC ACQJ Compact Cylinders
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