Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-40S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-40S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 50mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke50 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-40S
The AirTAC ACQJ125X50-40S is a big-bore JIS compact double-acting cylinder with an external threaded stop and lock nut that limits the extend stroke. You can fine-tune the extend end position directly on your machine across a 10-50mm usable range, shortening the 50mm full stroke by up to a 40mm window. The retract movement remains completely unaffected.
Because the piston area stays the same, output force is identical to a standard ACQ of this bore, delivering 6135.9N push at 0.5MPa. The Ø32mm rod uses an M22x2.5 female thread, and the M27x2.0 adjuster handles end-position tuning. Fixed NBR elastomer bumpers absorb impact at both ends, and the integrated -S magnet works with reed or solid-state switches.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-40S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-40S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 50 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 ACQJ125X50-40S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×50 | 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 ACQJ125X50-40S Is Used
Press Tooling Changeovers
Adapt heavy press end positions for different product heights on the fly without machining new spacers or swapping cylinders.
Large Assembly Station Setup
Dial in the exact clamping reach during initial equipment commissioning or when introducing a new large component variant.
Pallet Positioning Stops
Modify the extend limit on heavy-duty pallet handling lines to accommodate varied pallet sizes while maintaining full retract.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-40S the Right Cylinder?
For lower force needs, the Ø100 bore provides 3927.0N push @0.5MPa, while stepping up to the Ø160 bore yields 10053.1N if your application requires more power. If your end position never varies, a fixed-stroke ACQ cylinder is sufficient and avoids adjuster setup. When ordering this big-bore model, confirm the 125mm bore, 50mm full stroke, 40mm adjustment window, -S magnet, and female 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 ACQJ125X50-40S FAQ
It provides 6135.9N push and 5733.8N pull at 0.5MPa, 8590.3N push at 0.7MPa, and a maximum push of 1251 kgf at 1.0MPa. The usable extend range is 10-50mm (a 50mm full stroke minus a 40mm window), while the retract stroke stays at the full 50mm.
An external M27x2.0 threaded stop with a lock nut limits the extend length without altering piston area, so force remains identical to a standard ACQ. Fixed NBR bumpers decelerate the piston near stroke ends. A plain ACQ-type does not hold its load on air loss, so use an external rod lock or pilot-operated check valve for fail-safe holding.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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