Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-75S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-75S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 250mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke250 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-75S
The ACQJ125X250-75S is a double-acting JIS compact cylinder from AirTAC's big-bore range, engineered with an external threaded stop and lock nut to restrict the extend stroke. You can tune the forward end position on the machine without swapping parts, yielding a usable extend range of 175-250 mm (a 75 mm adjustment window from the 250 mm full stroke). The return stroke remains unaffected. An M27x2.0 adjuster thread handles the end-position limits.
Because the adjuster only restricts travel, the piston area stays the same, meaning force is identical to a standard ACQ of this bore. At 0.5 MPa, it delivers 6135.9 N of push force and 5733.8 N of pull force. The unit includes a PT3/8 port, a 32 mm piston rod, and fixed elastomer NBR bumpers at both ends for end-of-stroke deceleration. The -S magnet enables tracking with reed or solid-state switches.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-75S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-75S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 250 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 ACQJ125X250-75S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×250 | 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 ACQJ125X250-75S Is Used
Heavy Press Tonnage Checks
Dial in the exact extend position during trial press setups for new material thicknesses, tweaking the 175-250 mm range without machining custom spacers.
Large Welding Fixture Changeover
Shift the forward stop rapidly when switching between different chassis frame sizes on a heavy-duty welding line, utilizing the M27x2.0 adjuster.
Pallet Lift Height Tuning
Modify the lift height on-demand for varying pallet dimensions, relying on the 6135.9 N push force to elevate heavy loads securely.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-75S the Right Cylinder?
For 0.5 MPa pneumatic setups, this 125 mm bore generates 6135.9 N push and 5733.8 N pull force. If your application requires less force, scaling down to the 100 mm bore provides 3927.0 N push, while stepping up to the 140 mm bore yields 7696.9 N push. A standard fixed-stroke ACQ is sufficient if your end position never varies. When ordering, confirm the 125 mm bore, 250 mm full stroke, 75 mm window, S magnet, and female M22x2.5 rod-end 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 ACQJ125X250-75S FAQ
It delivers 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. The full stroke is 250 mm, but the external stop provides a 75 mm window, allowing the usable extend range to be set anywhere from 175 mm to 250 mm.
No, the adjuster only limits the extend travel length, so force remains identical to a standard ACQ of the same bore. Deceleration is handled by fixed elastomer NBR bumpers at both ends, not adjustable air cushions. For high-speed loads, an external shock absorber is recommended, and a rod lock is needed for fail-safe load holding on air loss.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
Request a Quote for Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-75S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.