Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-30SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-30SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 75mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke75 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-30SB
The AirTAC ACQJ125X75-30SB is a double-acting, big-bore JIS compact cylinder featuring an external threaded stop and lock nut on the extend side. This mechanism permits on-the-fly end-position tuning, providing a usable extend range of 45 to 75 mm without swapping parts. The retract stroke remains completely unaffected. Equipped with a male M30x1.5 piston rod end, it couples directly to heavy loads.
Because the piston area is unchanged, the output force is identical to a standard ACQ of this bore. You get 6135.9 N of push and 5733.8 N of pull at 0.5 MPa. The unit incorporates a fixed NBR elastomer bumper at each end for end-of-stroke deceleration, and the included -S magnet works with reed or solid-state switches via the body grooves.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-30SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-30SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 75 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 ACQJ125X75-30SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 ACQJ125X75-30SB Is Used
Press Tooling Changeover
Adapts the extend endpoint instantly during stamping die swaps, using the 45-75 mm range to accommodate varying tool heights without machining new spacers.
Heavy Material Forming
Sets precise clamping positions on large metal forming presses, where the M30x1.5 male rod threads directly into the fixture and the external stop dials the exact grip depth.
Automated Welding Stops
Dials in the exact electrode extension on robotic welding lines, allowing operators to tune the 45-75 mm stroke window on the machine to suit varied joint geometries.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-30SB the Right Cylinder?
This Ø125 bore yields 6135.9 N push at 0.5 MPa. Stepping down to an Ø80 bore gives 2513.2 N push, while stepping up to a Ø160 bore provides 10053.1 N push, allowing you to match the exact load requirement. If your machinery never requires end-position adjustments, a fixed-stroke ACQ cylinder will suffice. When ordering this adjustable variant, confirm the 125 mm bore, 75 mm full stroke, 30 mm adjuster window, the -S magnet for sensing, and the -B male rod 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 ACQJ125X75-30SB FAQ
The usable extend range is 45-75 mm (a 75 mm full stroke shortened by up to a 30 mm window). Force is identical to a standard ACQ: 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 with lock nut mechanically limits how far the rod extends, changing only the stroke length, not the piston area. Therefore, the force remains unchanged. The cylinder uses fixed NBR elastomer bumpers for deceleration, and the -S magnet supports both reed and solid-state switches.
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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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