Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-30SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-30SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 250mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke250 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-30SB
The AirTAC ACQJ140X250-30SB is a big-bore JIS compact pneumatic cylinder featuring an external threaded stop with a lock nut that limits the EXTEND end position. You can fine-tune the usable extend stroke anywhere from 220 mm up to the full 250 mm directly on your machinery, while the RETRACT stroke remains completely unaffected. This on-machine end-position tuning eliminates the need to swap out cylinder hardware for varying product dimensions.
Because the adjuster only restricts travel length and leaves the internal piston area untouched, the output force stays identical to a standard ACQ of this bore. Operating pressure spans 0.15-1.0 MPa, generating 7696.9 N of push force and 7294.8 N of pull force at 0.5 MPa. The unit incorporates fixed elastomer NBR bumpers at each end for end-of-stroke deceleration and features a built-in piston magnet (-S) compatible with reed or electronic solid-state switches. The -B suffix denotes a male M30x1.5 piston rod end that couples directly to your load.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-30SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-30SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 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 (Ø140mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 7697 N | 7295 N |
| 0.7 MPa | 10776 N | — |
| Max (@1.0 MPa) | 1570 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 ACQJ140X250-30SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | 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 ACQJ140X250-30SB Is Used
Heavy Press Tonnage Setup
Dial in the exact 220-250 mm extend position during heavy press tonnage setup, allowing precise material forming without machining new stop collars.
Automated Pallet Changeover
Modify the extend reach rapidly during automated pallet changeover on large packaging lines, accommodating different pallet widths seamlessly.
Injection Mold Trial
Establish trial end positions on large injection molding machines, tweaking the 30 mm window to find the optimal ejection distance before finalizing the mechanical setup.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-30SB the Right Cylinder?
When sizing this big-bore 140 mm variant, stepping down to the 125 mm bore drops the 0.5 MPa push force to 6135.9 N, whereas stepping up to the 160 mm bore increases it to 10053.1 N. If your equipment requires a fixed extend end position every cycle without variation, a standard ACQ cylinder will suffice. To order this adjustable model correctly, confirm the 140 mm bore, the 250 mm full stroke, the 30 mm adjustment window, the -S magnet for sensing, and the -B male rod thread. Note that a plain ACQ-type cylinder will not hold its load on air loss; for fail-safe load holding, an external rod lock or pilot-operated check valve is required.
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 ACQJ140X250-30SB FAQ
The push force is 7696.9 N and the pull force is 7294.8 N at 0.5 MPa, with a push force of 10775.7 N at 0.7 MPa and a maximum push of 1570 kgf at 1.0 MPa. The full stroke is 250 mm, and with the 30 mm adjustment window, the usable extend range is 220-250 mm. The retract stroke remains unaffected.
The external adjuster features an M27x2.0 threaded stop with a lock nut that mechanically limits the extend travel without changing the piston area, meaning the force is identical to a standard ACQ. Deceleration is handled by fixed elastomer NBR bumpers at each end, not an adjustable air cushion. For high-speed or high-energy loads, consider adding an external shock absorber or slowing the approach.
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Related AirTAC ACQJ Compact Cylinders
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