Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-50S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-50S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 300mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke300 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-50S
The ACQJ140X300-50S is a double-acting, big-bore JIS compact cylinder featuring a 140mm bore and a 300mm full stroke. An external M27x2.0 threaded stop with a lock nut lets you fine-tune the extend end position on the machine, providing a usable extend range of 250 to 300 mm. The retract stroke remains completely unaffected by this adjustment.
Because the piston area is unchanged, output force stays identical to a standard ACQ of this size, delivering 7696.9 N push and 7294.8 N pull at 0.5 MPa. The design includes a fixed NBR elastomer bumper at each end for end-of-stroke deceleration, and the built-in magnet (-S) works with reed or electronic solid-state switches via the integrated sensor grooves.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-50S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-50S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 mm |
| Full stroke | 300 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 ACQJ140X300-50S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | Bore size in mm. |
| ×300 | 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 ACQJ140X300-50S Is Used
Press Tooling Changeover
Adapts the extend endpoint quickly on heavy press lines when swapping forming dies, ensuring precise contact without machining new stop collars.
Large Assembly Fixture Calibration
Dial in the exact push depth on multi-model automotive subassembly fixtures, allowing operators to shift end positions for varying product heights.
Heavy Lift Positioning
Sets trial upper limits for heavy lifting platens in packaging machinery, preventing over-travel while maintaining the full 1570 kgf max push capacity.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-50S the Right Cylinder?
When sizing this big-bore 140mm unit, consider the adjacent bore options: the Ø125 generates 6135.9 N push at 0.5 MPa, while the Ø160 provides 10053.1 N. If your machine setup never requires altering the extend endpoint, a fixed-stroke ACQ cylinder will suffice. To order this adjustable variant correctly, confirm the 140mm bore, 300mm full stroke, 50mm adjustment window, the -S magnet option, and the default female rod-end thread (M22x2.5).
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 ACQJ140X300-50S FAQ
It delivers 7696.9 N push and 7294.8 N pull at 0.5 MPa, 10775.7 N push at 0.7 MPa, with a maximum push of 1570 kgf at 1.0 MPa. The full stroke is 300 mm, and the external adjuster allows the extend stroke to be shortened by up to 50 mm, yielding a usable extend range of 250 to 300 mm.
The M27x2.0 threaded adjuster with lock nut limits only the extend length, leaving the retract stroke untouched; force remains identical to a standard ACQ since the piston area is unchanged. Deceleration relies on a fixed NBR elastomer bumper at each end, not an adjustable air cushion. For fail-safe load holding during air loss, an external rod lock or pilot-operated check valve is required, as the cylinder drifts when unpressurized.
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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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