Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-20SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-20SB 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 ACQJ140X40-20SB
The AirTAC ACQJ140X40-20SB is a double-acting JIS compact cylinder featuring a big-bore 140 mm piston and a 40 mm full stroke. An external threaded stop with a lock nut lets you fine-tune the extend end position on the machine itself, providing a usable extend range of 20 to 40 mm. The retract stroke remains completely unaffected by this adjustment.
Because the adjuster alters only the travel length and not the piston area, output force is identical to a standard ACQ of this size. You get 7696.9 N push and 7294.8 N pull at 0.5 MPa. The unit includes a male M30x1.5 rod end for direct load coupling, a PT3/8 port, and fixed NBR elastomer bumpers at both ends. The integrated piston magnet (-S) supports both reed and solid-state electronic switches.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-20SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-20SB |
|---|---|
| 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 ACQJ140X40-20SB
| 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 ACQJ140X40-20SB Is Used
Press Tooling Setup
Dial in the exact extend stop during press tooling setup, allowing operators to shift the 20 to 40 mm working distance without machining new spacers.
Heavy Fixture Changeover
Accommodate heavy fixture changeover on large automotive assembly lines by turning the external M27x2.0 adjuster to meet varying part heights.
Pallet Positioning Stops
Serve as an adjustable end stop for pallet positioning systems, where the fixed elastomer bumper absorbs the impact of moving loads at the end of travel.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-20SB the Right Cylinder?
This 140 mm bore delivers 7696.9 N push at 0.5 MPa; stepping down to a 125 mm bore yields 6135.9 N, while a 160 mm bore provides 10053.1 N. If your equipment never requires end-position tuning, a fixed-stroke ACQ cylinder provides the same holding power in a simpler package. When ordering this adjustable variant, confirm the 40 mm full stroke, the 20 mm window, the -S magnet for electronic or reed sensors, and the -B male M30x1.5 rod 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 ACQJ140X40-20SB FAQ
It provides 7696.9 N push and 7294.8 N pull at 0.5 MPa, 10775.7 N push at 0.7 MPa, and a maximum push of 1570 kgf at 1.0 MPa. The full stroke is 40 mm with a 20 mm adjustment window, resulting in a usable extend range of 20 to 40 mm.
The external M27x2.0 threaded stop with lock nut limits how far the rod extends, shortening the stroke without changing the piston area, so force remains identical to a standard ACQ. The cylinder uses fixed elastomer bumpers rather than adjustable air cushions, and because it is a plain pneumatic actuator, it will not hold its load on air loss without an external rod lock or pilot-operated check valve.
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 ACQJ140X40-20SB
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.