Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-40S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-40S 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 ACQJ140X300-40S
The AirTAC ACQJ140X300-40S is a double-acting JIS compact cylinder featuring an external threaded stop and lock nut to limit the extend end position. You can fine-tune the forward stroke on the machine across a 260 to 300 mm usable range without swapping parts. The retract movement remains completely unaffected by this adjustment. As a big-bore variant, it delivers substantial power within a space-saving riveted body design.
Because the adjuster only alters travel length and not piston area, output force stays identical to a standard ACQ of this bore. At 0.5 MPa it generates 7696.9 N of push force and 7294.8 N of pull force. The unit incorporates a fixed NBR elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion. The included -S piston magnet pairs directly with reed or solid-state electronic sensors via the built-in switch grooves.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-40S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-40S |
|---|---|
| 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 ACQJ140X300-40S
| 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 ACQJ140X300-40S Is Used
Heavy Press Tonnage Setup
Dial in the exact 260 to 300 mm extend contact point on a large metalforming press during tooling setup, avoiding custom spacer machining.
Automated Pallet Changeover
Adjust the extend stop on the fly for different pallet widths in a materials handling line, using the M27x2.0 external adjuster to shift the end position.
Large Fixture Positioning
Probe trial end positions for bulky automotive machining fixtures, fine-tuning the stroke by up to 40 mm without disassembling the cylinder.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-40S the Right Cylinder?
Selecting this 140 mm bore model provides a 260 to 300 mm extend range, while the next size down (Ø100) yields 3927.0 N push at 0.5 MPa and the largest option (Ø160) provides 10053.1 N. If your application never requires end-position tuning, a fixed-stroke ACQ cylinder delivers the exact same holding power. When ordering this adjustable version, confirm the 300 mm full stroke, 40 mm window, S magnet option, PT3/8 port, and the default female M22x2.5 rod-end thread. Remember that a plain compact cylinder drifts on air loss; specify an external rod lock or pilot-operated check valve if you need fail-safe load holding.
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 ACQJ140X300-40S FAQ
This cylinder delivers 7696.9 N push and 7294.8 N pull at 0.5 MPa, 10775.7 N push at 0.7 MPa, and a maximum push of 1570 kgf at 1.0 MPa. The usable extend range is 260 to 300 mm, created by a 40 mm adjustment window on a 300 mm full stroke.
No, the external stop only shortens the extend travel, so force remains identical to a standard ACQ. Deceleration is handled by fixed NBR elastomer bumpers at both ends, not adjustable air cushions. For high-speed loads, add an external shock absorber.
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Related AirTAC ACQJ Compact Cylinders
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