Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X30-20S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X30-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 30mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke30 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X30-20S
The AirTAC ACQJ140X30-20S is a double-acting, single-rod JIS compact cylinder engineered for big-bore applications requiring precise on-machine extend positioning. An external threaded stop with a lock nut limits the outward stroke, providing a usable extend range of 10-30 mm (a 30 mm full stroke shortened by up to a 20 mm window). The retract stroke remains completely unaffected. Because the adjuster alters only the travel length and not the piston area, the output force is identical to a standard ACQ of this bore.
Delivering 7696.9 N of push force and 7294.8 N of pull force at 0.5 MPa, this Ø140 mm variant integrates a fixed NBR elastomer bumper at each end for end-of-stroke deceleration. The included -S magnet enables position sensing via compatible reed or electronic solid-state switches fitted into the body grooves. The unit features a Ø32 mm piston rod, a PT3/8 port, and an M27x2.0 external adjuster thread. Note that a plain compact cylinder does not hold its load upon air loss; utilize an external rod lock or pilot-operated check valve for fail-safe holding.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X30-20S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X30-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 mm |
| Full stroke | 30 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 ACQJ140X30-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | Bore size in mm. |
| ×30 | 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 ACQJ140X30-20S Is Used
Heavy Press Tonnage
Dial in the exact 10 to 30 mm extend stop on a heavy-duty press without machining new spacer blocks during tooling changes.
Metal Forming Stops
Fine-tune the outward stroke endpoint on the fly to accommodate varying material thicknesses in a metal bending fixture.
Large Assembly Jigs
Adjust the clamping reach on large-scale automotive assembly jigs to test trial end positions before finalizing the setup.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X30-20S the Right Cylinder?
Stepping down to a Ø125 bore drops the 0.5 MPa push force to 6135.9 N, while moving up to a Ø160 bore increases it to 10053.1 N. If your process requires a fixed extend endpoint without on-the-fly adjustments, a standard ACQ cylinder will suffice. When ordering, verify the 140 mm bore, 30 mm full stroke, 20 mm adjustable window, the -S magnet option, 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 ACQJ140X30-20S FAQ
The cylinder provides 7696.9 N push and 7294.8 N pull at 0.5 MPa, 10775.7 N push at 0.7 MPa, and a maximum push of 1570 kgf at 1.0 MPa. The usable extend range is 10-30 mm (30 mm full stroke minus a 20 mm window). It features a PT3/8 port, an M27x2.0 external adjuster thread, and a female M22x2.5 rod-end thread.
The external threaded stop with a lock nut mechanically limits the extend travel, allowing you to shorten the outward stroke without replacing parts. The adjuster changes the stroke length only, so the output force remains identical to a standard ACQ of the same bore. The retract stroke is unaffected, and fixed elastomer bumpers handle deceleration at both ends.
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Related AirTAC ACQJ Compact Cylinders
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