Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-40SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-40SB 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 ACQJ140X250-40SB
The ACQJ140X250-40SB is a big-bore JIS compact pneumatic cylinder featuring a double-acting single rod. An external threaded stop with a lock nut limits the EXTEND end position, giving a usable forward range of 210 to 250 mm. The RETRACT stroke remains unaffected by this mechanism. Because the internal piston area stays constant, the output force is identical to a standard ACQ of this bore.
Operating pressure spans 0.15 to 1.0 MPa, yielding a maximum push of 1570 kgf. This unit includes a male M30x1.5 piston rod end for direct load coupling and a built-in magnet (-S) for reed or solid-state switch sensing. Deceleration relies on a fixed NBR elastomer bumper at each end rather than an adjustable air cushion.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-40SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-40SB |
|---|---|
| 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 ACQJ140X250-40SB
| 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 ACQJ140X250-40SB Is Used
Press Tooling Changeover
Dial in the exact 210 to 250 mm extend position during die changes on a 140-ton press line without machining new spacers.
Heavy Assembly Jigs
Fine-tune the forward clamping reach on large automotive welding fixtures to adapt to varying subassembly widths.
Pallet Positioning Stops
Establish a precise end-stop for heavy load elevators, allowing operators to shorten the stroke by up to 40 mm on the fly.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-40SB the Right Cylinder?
Selecting this big-bore 140 mm unit means 7696.9 N push force at 0.5 MPa. If less power is needed, the smaller 125 mm bore provides 6135.9 N push, whereas the larger 160 mm bore offers 10053.1 N for heavier demands. A standard fixed-stroke ACQ suffices if your end position never requires field adjustments. Confirm your ordering essentials: 140 mm bore, 250 mm full stroke, 40 mm window, magnet (-S), and male rod thread (-B).
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 ACQJ140X250-40SB FAQ
At 0.5 MPa, push force is 7696.9 N and pull is 7294.8 N. At 0.7 MPa, push is 10775.7 N. Maximum push is 1570 kgf at 1.0 MPa. The full stroke is 250 mm, and the 40 mm window allows the extend stroke to be shortened down to 210 mm.
An M27x2.0 external threaded stop with a lock nut mechanically limits the forward extension, leaving retract unchanged. Force remains identical to a standard ACQ because the piston area is unaltered. Deceleration is handled by a fixed NBR elastomer bumper, not an adjustable air cushion, so external shock absorbers are advised for high-energy loads. Note that a plain ACQ-type does not hold its load on air loss; install an external rod lock for fail-safe holding.
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Standard models usually ship in 3-4 days.
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Related AirTAC ACQJ Compact Cylinders
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