Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X150-75SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X150-75SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 150mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke150 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X150-75SB
The AirTAC ACQJ125X150-75SB is a double-acting, big-bore JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend end position. You can fine-tune the usable extend stroke on the machine anywhere from 75mm up to the full 150mm without changing parts, while the retract stroke remains completely unaffected. This unit includes a male piston rod thread (M30x1.5) for direct load coupling and a built-in magnet for electronic or reed switches.
Because the adjuster only alters travel length and not piston area, the output force is identical to a standard ACQ of this bore. Expect a push of 6135.9N and pull of 5733.8N at 0.5MPa, rising to 8590.3N at 0.7MPa, with a maximum push of 1251kgf at 1.0MPa. The cylinder body uses fixed NBR elastomer bumpers at each end for end-of-stroke deceleration rather than adjustable air cushions. It operates at 30-500mm/s, accepts PT3/8 ports, and features an M27x2.0 adjuster thread.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X150-75SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X150-75SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 150 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 ACQJ125X150-75SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×150 | 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 ACQJ125X150-75SB Is Used
Press Tooling Changeover
Dial in the exact extend stop between 75 and 150mm when swapping press die sets of varying heights, ensuring precise clamping without machining new spacers.
Heavy Fixture Positioning
Adapt the extend end position on the fly for large welding fixtures, using the 6135.9N push force to secure heavy assemblies at varied depths.
Pallet Lift Stops
Regulate the extend stroke on heavy-duty pallet lifts, tweaking the external M27x2.0 stop screw to accommodate different pallet thicknesses while relying on fixed bumpers.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X150-75SB the Right Cylinder?
When sizing this big-bore 125mm compact cylinder, compare its 6135.9N push force at 0.5MPa against the adjacent 100mm bore (3927.0N) or the larger 140mm bore (7696.9N) to ensure adequate capacity. If your end-position never varies, a fixed-stroke ACQ suffices; otherwise, this ACQJ variant provides the 75mm adjustment window needed for product changeovers. Confirm your ordering essentials: 125mm bore, 150mm full stroke, 75mm window, S magnet for solid-state or reed sensors, and B male rod thread. Note that on air loss, a standard compact cylinder drifts; for fail-safe holding, add an external rod lock.
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 ACQJ125X150-75SB FAQ
This cylinder delivers a push of 6135.9N and a pull of 5733.8N at 0.5MPa, a push of 8590.3N at 0.7MPa, and a maximum push of 1251kgf at 1.0MPa. The usable extend range is 75-150mm, created by a 75mm adjustment window subtracted from the 150mm full stroke.
No, the external threaded stop alters only the extend stroke length, not the piston area, so force remains identical to a standard ACQ. The cylinder uses fixed NBR elastomer bumpers at each end for deceleration rather than adjustable air cushions, and the included magnet works with reed or electronic switches.
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