Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X30-20S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X30-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 30mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke30 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X30-20S
The AirTAC ACQJ125X30-20S is a double-acting, single-rod JIS compact cylinder from the big-bore range, featuring an external threaded stop with a lock nut that limits the EXTEND end position. You can fine-tune the extend stroke on the machine from 10 mm up to the full 30 mm (a 20 mm window) without swapping components, while the RETRACT stroke remains completely unaffected. The adjuster utilizes an M27x2.0 thread.
Because the piston area is unchanged, the force output is identical to a standard ACQ of this size, delivering 6135.9 N push and 5733.8 N pull at 0.5 MPa. The unit relies on a fixed NBR elastomer bumper at each end for deceleration rather than an adjustable air cushion, and the integrated -S magnet allows tracking by either reed or solid-state switches.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X30-20S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X30-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 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 ACQJ125X30-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | 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 ACQJ125X30-20S Is Used
Heavy Press Positioning
Dial in the exact extend stop on a large metal press during setup, allowing operators to test different end positions for new die heights without machining custom spacers.
Product Changeover Stops
Adapt heavy-duty conveyor diverter stops rapidly when switching between pallet sizes, using the external adjuster to shorten the extend stroke by up to 20 mm on the fly.
Large Fixture Clamping
Accommodate varying workpiece thicknesses in automotive welding fixtures by tweaking the extend end position, ensuring optimal clamp contact without reprogramming the machine.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X30-20S the Right Cylinder?
This 125 mm bore generates 6135.9 N push at 0.5 MPa, sitting between the 140 mm bore (7696.9 N) and the 100 mm bore (3927.0 N) for sizing up or down. If your application requires a fixed 30 mm extend position every cycle without variation, a standard ACQ cylinder is sufficient. When ordering, confirm the 125 mm bore, 30 mm full stroke, 20 mm adjustable window, the -S magnet for sensors, and the default female M22x2.5 rod-end thread with PT3/8 port.
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 ACQJ125X30-20S FAQ
The usable extend range is 10 to 30 mm (the 30 mm full stroke minus the 20 mm window). Force is identical to a standard ACQ of this bore: 6135.9 N push and 5733.8 N pull at 0.5 MPa, 8590.3 N push at 0.7 MPa, and a maximum push of 1251 kgf at 1.0 MPa.
The external M27x2.0 threaded stop limits only the extend length, leaving the retract stroke unchanged and keeping force output constant. The cylinder uses fixed elastomer bumpers for deceleration and will not hold its load on air loss; for fail-safe load holding, an external rod lock or pilot-operated check valve is required.
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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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