Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-10S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-10S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 300mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke300 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-10S
The AirTAC ACQJ125X300-10S is a double-acting, single-rod JIS compact cylinder featuring a big 125 mm bore and a 300 mm full stroke. An external M27x2.0 threaded stop with a lock nut limits the extend end position, providing a usable extend range of 290 to 300 mm. The retract stroke remains completely unaffected by this adjustment. Because the piston area is unchanged, the output force is identical to a standard ACQ of this bore.
This large-bore variant generates 6135.9 N of push force and 5733.8 N of pull force at 0.5 MPa, reaching a maximum push capacity of 1251 kgf at 1.0 MPa. It includes a fixed NBR elastomer bumper at each end for end-of-stroke deceleration and features a built-in piston magnet (-S) for position sensing. The cylinder operates at speeds from 30 to 500 mm/s and uses a PT3/8 port.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-10S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-10S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 300 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 ACQJ125X300-10S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×300 | 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 ACQJ125X300-10S Is Used
Heavy Press Tonnage Setup
Dial in the exact 290-300 mm extend position during heavy press commissioning without machining custom spacer rings.
Automated Welding Changeover
Shift the extend stop by a few millimeters to accommodate new fixture heights during automotive welding line product changeovers.
Large Assembly Machine Trials
Find the optimal end position for large-component assembly tooling on the fly, locking the M27x2.0 adjuster nut once the target hit is verified.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-10S the Right Cylinder?
When sizing this actuator, consider the neighbouring bores: stepping down to a 100 mm bore yields 3927.0 N push @0.5 MPa, while stepping up to a 140 mm bore provides 7696.9 N push @0.5 MPa. If your application requires a fixed extend end position that never varies, a standard ACQ cylinder without the external adjuster will suffice. To order, confirm the 125 mm bore, 300 mm full stroke, 10 mm adjustment 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 ACQJ125X300-10S FAQ
This cylinder 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. It has a 300 mm full stroke with a 10 mm adjustable window, giving a usable extend range of 290-300 mm. The piston rod is 32 mm, the port is PT3/8, the female rod-end thread is M22x2.5, and the external adjuster thread is M27x2.0.
The external threaded stop and lock nut mechanically limit how far the rod extends, allowing on-machine tuning without replacing parts. The adjuster changes stroke length only, so force remains identical to a standard ACQ. A fixed NBR elastomer bumper decelerates the load near stroke ends, but a plain cylinder does not hold its load on air loss; for fail-safe holding, use an external rod lock or pilot-operated check valve.
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