Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-20B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-20B 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 ACQJ40X80-20B
The AirTAC ACQJ40X80-20B is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend end position. You can fine-tune the usable extend range from 60 mm up to the full 80 mm stroke on the machine without changing parts, while the retract stroke remains completely unaffected. It incorporates a fixed elastomer bumper at each end and features a standard PT1/8 port.
Because the piston area stays the same, the output force is identical to a standard ACQ of this bore, yielding 628.3 N push and 527.8 N pull at 0.5 MPa. This specific configuration includes a male M14x1.5 piston rod end for direct load coupling and ships without a magnet, although the body retains magnetic-switch grooves for adding external sensors later.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-20B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-20B |
|---|---|
| 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 ACQJ40X80-20B
| 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 ACQJ40X80-20B Is Used
Machine Tending Setup
Dial in the exact 60 to 80 mm extend position for varying part lengths on a CNC lathe without machining custom spacers.
Carton Changeover Stops
Adapt a packaging line flap-folding mechanism rapidly by turning the external M12x1.25 adjuster to match new box dimensions.
Assembly Fixture Trials
Test multiple end-of-stroke positions on a riveting fixture to find the optimal clamping depth before locking the nut down.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-20B the Right Cylinder?
If your application requires slightly less force, the adjacent ACQJ32 bore provides 402.1 N push at 0.5 MPa, whereas stepping up to the ACQJ50 bore yields 981.8 N push. If the extend stop is unnecessary for your setup, a fixed-stroke ACQ cylinder of the same bore and stroke will suffice. When ordering this unit, verify the 40 mm bore, 80 mm full stroke, 20 mm adjuster window, the male rod thread (-B), and confirm that no internal magnet (-S) is needed for your sensing requirements.
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 ACQJ40X80-20B FAQ
It has a 40 mm bore and an 80 mm full stroke with a 20 mm adjustment window, giving a usable extend range of 60-80 mm. Theoretical force matches a standard ACQ: 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push at 0.7 MPa, and a maximum push of 128 kgf at 1.0 MPa. The port size is PT1/8.
An external M12x1.25 threaded stop with a lock nut limits the extend stroke, allowing on-machine tuning without changing parts. The retract stroke is unaffected. The adjuster only changes the stroke length, so force remains identical to a standard cylinder. Deceleration is handled by a fixed elastomer bumper, not an adjustable air cushion.
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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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