Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X75-40S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X75-40S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 75mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke75 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X75-40S
The AirTAC ACQJ140X75-40S is a double-acting JIS compact cylinder featuring a 140mm bore and a 75mm 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 outward travel range of 35-75mm. The retract distance remains completely unaffected by this adjustment. Because the piston area is unchanged, the output force is identical to a standard ACQ of this size, delivering 7696.9N push and 7294.8N pull at 0.5 MPa.
This big-bore compact unit integrates a fixed NBR elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion. Equipped with the -S magnet option, the cylinder works seamlessly with both reed and electronic (solid-state) switches via its built-in sensor grooves. Operating pressure spans 0.15-1.0 MPa, with a PT3/8 port and a 32mm piston rod.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X75-40S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X75-40S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 mm |
| Full stroke | 75 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 ACQJ140X75-40S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | Bore size in mm. |
| ×75 | 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 ACQJ140X75-40S Is Used
Heavy Press Tooling Changeover
Adapt large forming presses to different die heights by dialing the extend stop back by 40mm, eliminating the need to machine custom spacer rings.
Large-Part Machining Stops
Set precise end positions for bulky castings on CNC transfer lines, allowing operators to tweak the 35-75mm travel window for varying raw stock dimensions.
Industrial Pallet Positioning
Fine-tune the pusher endpoint on heavy-duty palletizers to accommodate varying pallet widths without swapping out the entire pneumatic assembly.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X75-40S the Right Cylinder?
When sizing this 140mm bore actuator, dropping to a 125mm bore reduces the 0.5 MPa push output to 6135.9N, while stepping up to a 160mm bore increases it to 10053.1N. If your application never requires altering the extend endpoint, a fixed-stroke ACQ cylinder is sufficient and more compact. For ordering, confirm the 140mm bore, 75mm full stroke, 40mm adjuster window, the -S magnet, and the default female M22x2.5 rod-end thread. Remember that a plain compact cylinder does not hold its load on air loss; specify an external rod lock or pilot-operated check valve for 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 ACQJ140X75-40S FAQ
The force is identical to a standard ACQ of this bore: push is 7696.9N and pull is 7294.8N at 0.5 MPa, push is 10775.7N at 0.7 MPa, and maximum push is 1570 kgf at 1.0 MPa. The full stroke is 75mm with a 40mm adjustable window, allowing the extend stroke to be set anywhere from 35mm to 75mm. The external adjuster features an M27x2.0 thread.
An external threaded stop with a lock nut limits how far the rod extends, changing only the stroke length and leaving the retract stroke unaffected. Deceleration is handled by fixed NBR elastomer bumpers at both ends, not adjustable air cushions. Note that this cylinder does not inherently hold its load if air pressure is lost; for fail-safe load holding, an external rod lock or pilot-operated check valve is required.
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