Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X175-40SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X175-40SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 175mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke175 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X175-40SB
The ACQJ125X175-40SB is a double-acting JIS compact cylinder featuring an external adjustable stroke mechanism. An M27x2.0 threaded stop with a lock nut limits the extend end position, providing a usable extension range of 135 to 175 mm by shortening the 175 mm base stroke up to 40 mm. The retract distance remains completely unaffected. As a big-bore pneumatic actuator, this unit handles heavy tasks with a maximum standard stroke capacity of 300 mm.
Because the piston area is unchanged, output force is identical to a standard ACQ of the same bore. At 0.5 MPa, it generates 6135.9 N of push force and 5733.8 N of pull force. This variant includes a built-in piston magnet (-S) for compatibility with reed or solid-state electronic switches, and a male M30x1.5 threaded rod end (-B) for direct load coupling. It uses a PT3/8 port and relies on a fixed NBR elastomer bumper at each end for end-of-stroke deceleration.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X175-40SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X175-40SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 175 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 ACQJ125X175-40SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×175 | 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 ACQJ125X175-40SB Is Used
Press Tooling Changeover
Adapts the extend end position on heavy stamping presses during product family changeovers, avoiding the need to machine custom spacer rings.
Large Fixture Clamping
Dial in the exact clamping reach on multi-model welding fixtures, ensuring parts of varying widths are held securely without repositioning the cylinder.
Bending Machine Stops
Sets precise material bend depths on heavy-duty forming machines, allowing operators to fine-tune the 135-175 mm extend limit on the fly.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X175-40SB the Right Cylinder?
Select this 125 mm bore actuator when your application requires substantial force alongside variable end positioning. If you need slightly less thrust, the next smaller 100 mm bore yields 3927.0 N push at 0.5 MPa; stepping up to the 140 mm bore provides 7696.9 N. A fixed-stroke ACQ is sufficient if the extension distance never changes. To order, confirm the 125 mm bore, 175 mm full stroke, 40 mm adjustment window, the -S magnet, 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 ACQJ125X175-40SB FAQ
The usable extend range is 135-175 mm (a 40 mm window off the 175 mm full stroke). 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.
An external M27x2.0 threaded stop with a lock nut mechanically limits the extend distance; the retract stroke and piston area remain unchanged. Deceleration relies on a fixed NBR elastomer bumper, not an adjustable air cushion. For fail-safe load holding upon air loss, an external rod lock or pilot-operated check valve is required.
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Related AirTAC ACQJ Compact Cylinders
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