Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X75-20S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X75-20S 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 ACQJ140X75-20S
The AirTAC ACQJ140X75-20S is a double-acting, single-rod JIS compact cylinder from the big-bore range, featuring a 140 mm bore and a 75 mm full stroke. An external threaded stop with a lock nut limits the extend end position, allowing you to fine-tune the usable extend range from 55 mm up to 75 mm directly on the machine. The retract stroke 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 7696.9 N push at 0.5 MPa. The unit uses a PT3/8 port and a fixed elastomer bumper at each end for deceleration. Equipped with a piston magnet (-S), the body grooves accept both reed and electronic solid-state switches for precise position detection.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X75-20S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X75-20S |
|---|---|
| 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 ACQJ140X75-20S
| 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 ACQJ140X75-20S Is Used
Heavy Press Tonnage Setup
Dial in the exact 55 to 75 mm extend position during heavy press tonnage setup, avoiding the need to machine custom spacer collars for each new job.
Large Weldment Forming Stops
Adjust the end stop on the fly for large weldment forming stops, accommodating varying material thicknesses without swapping out the entire actuator.
Injection Mold Clamping
Fine-tune the extend limit for injection mold clamping where a fixed elastomer bumper decelerates the motion near the final 75 mm position.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X75-20S the Right Cylinder?
For 0.5 MPa push requirements below 7696.9 N, the 125 mm bore yields 6135.9 N, while the 160 mm bore provides 10053.1 N if your application demands higher force. If your end position never varies, a fixed-stroke ACQ cylinder is simpler and sufficient. When ordering, verify the 140 mm bore, 75 mm full stroke, 20 mm adjustable 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 ACQJ140X75-20S FAQ
At 0.5 MPa, the push force is 7696.9 N and the pull force is 7294.8 N. At 0.7 MPa, the push force is 10775.7 N, with a maximum push of 1570 kgf at 1.0 MPa. The usable extend range is 55 to 75 mm, created by the 20 mm adjustable window on the 75 mm full stroke.
No, the external M27x2.0 threaded stop only limits the extend stroke length, leaving the force identical to a standard ACQ. The cylinder uses a fixed elastomer bumper, not an adjustable air cushion. It will not hold a load if air pressure is lost; use an external rod lock or pilot-operated check valve for fail-safe holding.
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Related AirTAC ACQJ Compact Cylinders
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