Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-30S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-30S 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 ACQJ125X125-30S
The AirTAC ACQJ125X125-30S is a double-acting, single-rod JIS compact cylinder featuring an external extend-stop adjuster. A threaded rod with a lock nut permits you to fine-tune the extend end position on the machine itself, yielding a usable forward travel range of 95 to 125 mm from the 125 mm full stroke. The retract distance remains completely unaffected. Because the piston area stays constant, output force is identical to a standard ACQ of this bore.
This big-bore compact unit pushes with 6135.9 N at 0.5 MPa and 8590.3 N at 0.7 MPa, reaching a maximum push of 1251 kgf at 1.0 MPa. It incorporates a fixed elastomer NBR bumper at each end for impact absorption rather than an adjustable air cushion. The -S piston magnet enables position sensing with reed or solid-state switches, and the PT3/8 port handles pneumatic supply for heavy-duty tasks.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-30S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-30S |
|---|---|
| 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 ACQJ125X125-30S
| 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 ACQJ125X125-30S Is Used
Press Tonnage Tryout
Dial in the exact 95 to 125 mm forward position during stamping press setup to test material flow before finalizing the mechanical stop.
Pallet Changeover Stops
Modify the extend endpoint on the fly for different pallet widths on a heavy-duty conveyor line without machining new spacers.
Molding Ejection Setup
Tune the ejection reach on large injection molding machines to safely clear varied product depths during initial tool trials.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-30S the Right Cylinder?
When sizing this 125 mm bore unit, dropping to a 100 mm bore lowers the push force to 3927.0 N at 0.5 MPa, whereas stepping up to a 140 mm bore raises it to 7696.9 N. If your machinery never requires altering the end position, a fixed-stroke ACQ cylinder provides the same holding power without the external hardware. To order, confirm the 125 mm bore, 125 mm full stroke, 30 mm adjuster window, the -S magnet, and the M22x2.5 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 ACQJ125X125-30S FAQ
It provides 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 125 mm full stroke can be shortened by up to 30 mm, giving a usable extend range of 95 to 125 mm.
An external M27x2.0 threaded stop with a lock nut limits the forward travel, shortening the stroke without changing the piston area, so output force remains identical to a standard ACQ. The cylinder uses a fixed NBR bumper for end-of-stroke deceleration, not a brake, and will drift on air loss unless paired with an external rod lock.
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1-Year Warranty
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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