Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-20S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-20S 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 ACQJ40X80-20S
The AirTAC ACQJ40X80-20S is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend end position. You can fine-tune the usable extend stroke anywhere between 60 and 80 mm directly on your machinery, while the retract stroke remains completely unaffected.
Because the internal piston area stays constant, 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. The unit features a 16 mm rod, an M12x1.25 adjuster thread, fixed NBR elastomer bumpers for end-of-stroke deceleration, and an integrated magnet for position sensing.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-20S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-20S |
|---|---|
| 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 ACQJ40X80-20S
| 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 ACQJ40X80-20S Is Used
CNC Machining Fixtures
Dial in the exact clamping reach on machining centers during setup or when switching part programs, using the external stop to prevent over-travel.
Carton Forming Stops
Modify the folding arm extension depth on packaging lines to accommodate varying box dimensions without swapping out the entire actuator body.
Assembly Press Positioning
Establish trial end positions for pressing bearings or pins, allowing operators to tweak the 60-80 mm reach for delicate alignment tasks.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-20S the Right Cylinder?
For lower force requirements, the 32 mm bore provides 402.1 N push at 0.5 MPa, whereas stepping up to the 50 mm bore yields 981.8 N push. If your equipment never requires altering the extend endpoint, a fixed-stroke ACQ40X80 cylinder is sufficient. When ordering this adjustable variant, verify the 40 mm bore, 80 mm full stroke, 20 mm adjuster window, the S magnet option, and your preferred female M8x1.25 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-20S FAQ
It provides 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 full stroke is 80 mm with a 20 mm adjustable window, giving a usable extend range of 60-80 mm. Operating pressure is 0.15-1.0 MPa.
The M12x1.25 threaded stop alters only the extend stroke length, leaving piston area and force unchanged. The cylinder uses fixed NBR elastomer bumpers rather than adjustable air cushions. The built-in magnet (-S) works with reed or electronic solid-state switches.
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.
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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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