Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-20S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-20S 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 ACQJ140X40-20S
The AirTAC ACQJ140X40-20S is a double-acting, single-rod JIS compact cylinder engineered for big-bore applications up to 300mm stroke. An external M27x2.0 threaded stop with a lock nut restricts the forward extend position, allowing you to tune the usable extend range from 20mm up to the full 40mm directly on your equipment. The return stroke remains completely unaffected by this adjustment.
Because the piston area stays constant, the output force is identical to a standard ACQ of the same size, yielding 7696.9N push and 7294.8N pull at 0.5MPa. This large 140mm bore variant features a 32mm piston rod, a PT3/8 port, and a fixed NBR elastomer bumper at each end for end-of-stroke deceleration. The integrated -S magnet works seamlessly with both reed and electronic solid-state sensors.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-20S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-20S |
|---|---|
| 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 ACQJ140X40-20S
| 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 ACQJ140X40-20S Is Used
Heavy Press Tonnage Setup
Dial in the exact 20-40mm extend position during heavy press commissioning to accommodate varying material thicknesses without machining new spacers.
Large Fixture Changeover
Adjust the end stop rapidly when swapping large machining fixtures on a production line, saving downtime by skipping custom mechanical top plates.
Automated Assembly Trial
Test different end positions on an automated assembly rig to find the optimal pressing depth for new components before finalizing the mechanical setup.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-20S the Right Cylinder?
For 0.5MPa operations, this 140mm bore generates 7696.9N push force. Stepping down to the 125mm bore yields 6135.9N push, while no larger standard bore exists in this compact family. If your application strictly requires a fixed 40mm extend position without any on-machine tuning, a standard ACQ140X40 cylinder will suffice. When ordering, verify the 140mm bore, 40mm full stroke, 20mm adjustment window, the -S magnet option, and the default female M22x2.5 rod-end thread.
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 ACQJ140X40-20S FAQ
At 0.5MPa it provides 7696.9N push and 7294.8N pull, and 10775.7N push at 0.7MPa. Maximum push is 1570kgf at 1.0MPa. The full stroke is 40mm with a 20mm adjustable window, giving a usable extend range of 20-40mm. It features a 32mm rod, PT3/8 port, female M22x2.5 rod-end, and an M27x2.0 external adjuster thread.
No, the adjuster only changes the extend stroke length, not the piston area, so force remains identical to a standard ACQ140. Deceleration relies on a fixed NBR elastomer bumper at each end, not an adjustable air cushion. Note that a plain compact cylinder drifts on air loss; for fail-safe holding, use an external rod lock.
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Related AirTAC ACQJ Compact Cylinders
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