Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-20S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 125mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke125 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-20S
The AirTAC ACQJ125X125-20S is a double-acting JIS compact cylinder featuring a big-bore 125mm piston and an external stroke adjuster. A threaded stop with a lock nut on the rod-end side restricts how far the rod extends, yielding a usable forward travel range of 105-125mm from the full 125mm stroke. The return stroke remains completely unaffected. Because the piston area is unaltered, output force equals that of a standard ACQ of this size.
This large-bore variant delivers 6135.9N of push force and 5733.8N of pull force at 0.5MPa. It incorporates fixed NBR elastomer bumpers at both ends for end-of-travel deceleration rather than adjustable air cushions. The integrated piston magnet (-S option) supports both reed and solid-state electronic switches via the body's sensor grooves. With a PT3/8 port and a 32mm rod, this unit operates at pressures from 0.15 to 1.0MPa.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-20S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 125 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 ACQJ125X125-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×125 | 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 ACQJ125X125-20S Is Used
Heavy Press Tonnage Calibration
Dial in the exact 105-125mm extend position during press setup to calibrate tonnage without machining custom spacers.
Automotive Body Welding Changeover
Quickly alter the end stop for different chassis panel fixtures, using the M27x2.0 adjuster to shift the tooling contact point.
Large Metal Forming Trial Strokes
Test varying material deformation depths on the fly, relying on the 6135.9N push force to seat heavy blanks securely.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-20S the Right Cylinder?
Choosing this 125mm bore provides a maximum push of 1251kgf at 1.0MPa. If your application requires less energy, stepping down to a 100mm bore yields 3927.0N push at 0.5MPa, whereas moving up to a 140mm bore offers 7696.9N push at 0.5MPa. A standard fixed-stroke ACQ is sufficient if your end position never varies. When ordering, confirm the 125mm bore, 125mm full stroke, 20mm adjuster window, the -S magnet, and the default female M22x2.5 rod-end thread. Note that a plain cylinder drifts on air loss; utilize an external rod lock for fail-safe load holding.
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 ACQJ125X125-20S FAQ
It provides 6135.9N push and 5733.8N pull at 0.5MPa, 8590.3N push at 0.7MPa, and a maximum push of 1251kgf at 1.0MPa. The full stroke is 125mm with a 20mm adjustable window, allowing the extend stroke to be fine-tuned within a 105-125mm range.
The external M27x2.0 threaded stop with a lock nut mechanically limits the extend position without altering the piston area, meaning the output force remains identical to a standard ACQ. The retract stroke is unaffected. Fixed NBR elastomer bumpers decelerate the load at the ends, and the -S magnet works with reed or electronic switches.
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Covers non-human-caused product damage.
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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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