Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X175-20SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X175-20SB 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 ACQJ125X175-20SB
The ACQJ125X175-20SB is a double-acting JIS compact cylinder from AirTAC's big-bore range, engineered with a 125mm bore and a 175mm full stroke. It features a male-thread piston rod end (M30x1.5) for direct load coupling and a built-in magnet (-S) compatible with reed or solid-state electronic switches. Operating pressure spans 0.15-1.0 MPa, supporting heavy-duty automation tasks.
An external M27x2.0 threaded stop with a lock nut limits the extend end position, providing a usable forward range of 155-175mm (the 20mm window shortens the stroke) while the retract stroke remains completely unaffected. Because the piston area is unchanged, force output is identical to a standard ACQ of this size: 6135.9N push and 5733.8N pull at 0.5 MPa. Fixed NBR elastomer bumpers decelerate the load at each end, though external shock absorbers are advised for high-energy cycles.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X175-20SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X175-20SB |
|---|---|
| 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 ACQJ125X175-20SB
| 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 ACQJ125X175-20SB Is Used
Heavy Press Tonnage Setup
Dial in the exact 155-175mm clamping extension on a multi-model assembly line without machining new spacers for every product changeover.
Large Fixture Positioning
Fine-tune the end-of-stroke contact point on oversized welding fixtures to accommodate varying part tolerances directly at the machine.
Palletizing Height Compensation
Adjust the downward extend stop on the fly to handle varying pallet heights or product sizes without altering the pneumatic valve timing.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X175-20SB the Right Cylinder?
When sizing this big-bore variant, consider the neighboring bores: a 100mm bore yields 3927.0N push at 0.5 MPa, while stepping up to a 140mm bore provides 7696.9N push. If your application requires a fixed 175mm reach without on-machine end-position tuning, a standard ACQ125X175 cylinder is sufficient. To order this adjustable version, confirm the 125mm bore, 175mm full stroke, 20mm 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 ACQJ125X175-20SB FAQ
Force is identical to a standard ACQ of this bore: 6135.9N push and 5733.8N pull at 0.5 MPa, 8590.3N push at 0.7 MPa, and a maximum push of 1251 kgf at 1.0 MPa. The usable extend range is 155-175mm (a 20mm window off the 175mm full stroke), while the retract stroke is unaffected.
An external M27x2.0 threaded stop with a lock nut mechanically limits the extend position, changing only the stroke length, not the piston area or force. Fixed NBR elastomer bumpers decelerate the load at stroke ends, but a plain ACQ-type 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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