Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-75S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-75S 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 ACQJ140X300-75S
The ACQJ140X300-75S is a double-acting JIS compact cylinder featuring a big-bore 140mm piston and a 300mm full stroke. An external threaded stop with a lock nut restricts how far the rod extends, yielding a usable forward travel range of 225-300mm. The return stroke remains completely unaffected by this adjustment. Because the piston area stays constant, output force equals a standard ACQ, delivering 7696.9N push and 7294.8N pull at 0.5MPa.
This unit includes a built-in magnet (-S) for position sensing, compatible with reed or solid-state switches. It uses PT3/8 ports and a 32mm rod with a female M22x2.5 end thread. Deceleration is handled by fixed NBR elastomer bumpers at both ends rather than adjustable air cushions. Operating pressure spans 0.15-1.0MPa, and the maximum standard stroke for this large size is 300mm.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-75S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-75S |
|---|---|
| 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 ACQJ140X300-75S
| 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 ACQJ140X300-75S Is Used
Heavy Press Tonnage Tuning
Dial in the exact forming depth on large metal stamping presses during tooling setup without machining new spacers.
Large Fixture Changeover
Adapt automated machining centers to different part heights by shifting the extend limit across the 225-300mm window.
Pallet Positioning Stops
Alter the end stop for varying pallet sizes on heavy-duty conveyor lines, ensuring precise indexing without part swaps.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-75S the Right Cylinder?
Selecting this 140mm bore provides 7696.9N push force at 0.5MPa; dropping to a 125mm bore reduces push to 6135.9N, while stepping up to 160mm raises it to 10053.1N. If your application never requires modifying the end position, a fixed-stroke ACQ140X300 is sufficient. When ordering, confirm the 140mm bore, 300mm full stroke, 75mm adjuster window, -S magnet, and female M22x2.5 rod thread. Note that a plain compact cylinder drifts on air loss; for fail-safe load holding, add an external rod lock or pilot-operated check valve.
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 ACQJ140X300-75S FAQ
It delivers 7696.9N push and 7294.8N pull at 0.5MPa, 10775.7N push at 0.7MPa, and a maximum push of 1570kgf at 1.0MPa. The full stroke is 300mm with a 75mm adjustment window, giving a usable extend range of 225-300mm. The retract stroke is unaffected.
An external M27x2.0 threaded stop with a lock nut mechanically limits the forward travel distance, meaning force is identical to a standard ACQ since piston area is unchanged. Deceleration relies on fixed NBR elastomer bumpers, not adjustable air cushions, so external shock absorbers are recommended for high-energy loads.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
Request a Quote for Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-75S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.