Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-40S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-40S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 125mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke125 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-40S
The ACQJ125X125-40S is a double-acting JIS compact cylinder featuring a big-bore 125 mm body and a built-in piston magnet (-S). An external threaded stop with a lock nut restricts the forward extend motion, providing a usable extension span of 85 to 125 mm. The return stroke remains fixed at the full 125 mm. Because the piston area is unaltered, output thrust matches a standard ACQ exactly.
Operating pressure spans 0.15 to 1.0 MPa, yielding a maximum push capacity of 1251 kgf. The design incorporates fixed NBR elastomer bumpers at both ends for end-of-travel deceleration rather than adjustable air cushions. Magnetic-switch grooves accommodate reed or solid-state sensors, and the PT3/8 porting mates with the 32 mm rod.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-40S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-40S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 125 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 ACQJ125X125-40S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×125 | 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 ACQJ125X125-40S Is Used
Press Tooling Setup
Dial in the exact 85 to 125 mm extend position during press tooling changes without machining custom spacers.
Heavy Material Forming
Leverage 6135.9 N of thrust at 0.5 MPa to form heavy-gauge materials while using the external stop to limit travel.
Pallet Positioning Stops
Adjust the end stop on the fly for varying pallet sizes on a high-capacity conveyor line.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-40S the Right Cylinder?
For 0.5 MPa thrust requirements, the 100 mm bore delivers 3927.0 N push, whereas this 125 mm unit provides 6135.9 N; stepping up to the 140 mm bore raises that to 7696.9 N. If your application never needs end-position tweaking, a fixed-stroke ACQ125X125 works fine. When ordering, verify the full 125 mm stroke, the 40 mm adjuster window, the S magnet option, and the default female M22x2.5 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 ACQJ125X125-40S FAQ
At 0.5 MPa, push force is 6135.9 N and pull is 5733.8 N; at 0.7 MPa, push is 8590.3 N. The maximum push is 1251 kgf at 1.0 MPa. The full stroke is 125 mm, the adjustable window is 40 mm, and the usable extend range is 85 to 125 mm.
An external M27x2.0 threaded stop with a lock nut limits the forward stroke length only; the retract stroke is unaffected. Because the piston area is unchanged, force remains identical to a standard ACQ. The cylinder uses fixed elastomer bumpers, not air cushions, and will not hold a load on air loss—use an external rod lock 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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