Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-40S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-40S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 40mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke40 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-40S
The AirTAC ACQJ140X40-40S is a double-acting JIS compact cylinder from the big-bore range, equipped with a piston magnet for electronic or reed switch sensing. An external threaded stop with a lock nut restricts the forward extension, yielding a usable extend span of 0-40mm from its 40mm total length. Retraction remains completely unaffected.
Because the adjuster solely dictates travel length without altering piston area, output force stays identical to a standard ACQ of this size. The unit pushes with 7696.9N and pulls with 7294.8N at 0.5MPa, reaching a maximum 1570 kgf at 1.0MPa. It incorporates fixed NBR elastomer bumpers at both ends rather than adjustable pneumatic cushions, and utilizes a PT3/8 port alongside a 32mm rod.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-40S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-40S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 mm |
| Full stroke | 40 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 ACQJ140X40-40S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | Bore size in mm. |
| ×40 | 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 ACQJ140X40-40S Is Used
Heavy Press Tonnage Setup
Dial in the exact 0-40mm extend contact point during heavy press commissioning without machining new spacers or swapping cylinders.
Automated Welding Changeover
Shift the forward stop instantly when adapting robotic welding fixtures for different automotive chassis frame dimensions.
Large Valve Positioning
Fine-tune the actuation reach on massive process valves where a fixed 40mm stroke might slightly overshoot the required seat closure.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-40S the Right Cylinder?
If your application requires less thrust, the adjacent smaller 100mm bore yields 3927.0N push at 0.5MPa, whereas stepping up is unnecessary as the 140mm already provides 7696.9N. A fixed-stroke ACQ suffices if your end position never requires tweaking, but this ACQJ variant shines when you need on-the-fly length adjustments. Confirm your ordering essentials: 140mm bore, 40mm full travel, 40mm window, the S magnet, and the default female M22x2.5 rod end.
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 ACQJ140X40-40S FAQ
It delivers a push force of 7696.9N and a pull force of 7294.8N at 0.5MPa, and 10775.7N push at 0.7MPa. The maximum push is 1570 kgf at 1.0MPa. The usable extend range is 0-40mm (40mm full stroke minus the 40mm adjustment window).
The M27x2.0 external threaded stop limits only the extend stroke; force remains identical to a standard ACQ because piston area is unchanged. Fixed NBR bumpers decelerate the load near stroke ends, but a plain cylinder drifts on air loss, so use an external rod lock for fail-safe holding.
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 ACQJ140X40-40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.