Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-40B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-40B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 80mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke80 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-40B
The AirTAC ACQJ40X80-40B is a double-acting JIS compact cylinder featuring a male-thread piston rod (M14x1.5) for direct load coupling. An external threaded stop with a lock nut limits the extend end position, giving a usable extend range of 40 to 80 mm from the 80 mm full stroke. The retract stroke remains completely unaffected by this adjustment. Because the piston area stays constant, the force is identical to a standard ACQ of this bore, delivering 628.3 N push and 527.8 N pull at 0.5 MPa.
This unit ships without a magnet, yet the body retains magnetic-switch grooves for adding reed or solid-state sensors later. It uses a fixed NBR elastomer bumper at each end for end-of-travel deceleration rather than an adjustable air cushion. Operating pressure spans 0.15 to 1.0 MPa, and the PT1/8 port matches the 40 mm bore size. The external adjuster utilizes an M12x1.25 thread for precise on-machine positioning.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-40B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-40B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 80 mm |
| Adjuster thread | M12×1.25 |
| Port size | PT1/8 |
| 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 | M8×1.25 (F) / M14×1.5 (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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-40B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-40B Is Used
Machining Fixture Stops
Dial in the exact extend position for varying part lengths on a CNC machining fixture without machining new stop spacers.
Product Changeover Guides
Adjust the extend endpoint on packaging line guide rails during a rapid product format changeover to accommodate different carton widths.
Prototype End Positions
Fine-tune the trial extension stroke on laboratory test machinery to find the optimal contact pressure before finalizing the mechanical setup.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-40B the Right Cylinder?
If you need slightly less force, the 32 mm bore provides 402.1 N push at 0.5 MPa, while stepping up to the 50 mm bore yields 981.8 N push. A fixed-stroke ACQ suffices if your end position never requires tweaking. When ordering, confirm the 40 mm bore, 80 mm full stroke, 40 mm adjuster window, male rod thread (-B), and whether you need the -S magnet option for sensing.
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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-40B FAQ
The push force is 628.3 N and pull is 527.8 N at 0.5 MPa, with a push of 879.6 N at 0.7 MPa and a maximum push of 128 kgf at 1.0 MPa. The 40 mm window allows the extend stroke to be shortened by up to 40 mm, providing a usable extend range of 40 to 80 mm.
The external M12x1.25 threaded stop with a lock nut limits the extend travel distance without changing the piston area, meaning the force remains identical to a standard ACQ. The fixed elastomer bumper decelerates the rod near the stroke end, but a plain cylinder does not hold its load on air loss; for a fail-safe hold, an external rod lock or pilot-operated check valve is recommended.
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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.
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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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