Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X40-20S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X40-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 40mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke40 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X40-20S
The AirTAC ACQJ40X40-20S is a double-acting JIS compact cylinder featuring an external threaded stop and lock nut that limits the extend end position. With a 40mm full stroke and a 20mm adjustment window, you can fine-tune the usable extend range from 20mm up to 40mm directly on your machinery without swapping parts. The retract stroke remains completely unaffected by this mechanism.
Because the adjuster only restricts travel length and not piston area, output force stays identical to a standard ACQ of the same bore. This 40mm bore unit generates 628.3N of push force and 527.8N of pull force at 0.5 MPa, peaking at a 128 kgf maximum push at 1.0 MPa. It utilizes a 16mm piston rod, PT1/8 porting, and fixed elastomer bumpers at both ends for end-of-stroke deceleration.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X40-20S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X40-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 40 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 ACQJ40X40-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X40-20S Is Used
Machining Fixture Stops
Dial in the exact clamping extension on CNC machining fixtures to accommodate raw material tolerances without fabricating new stop collars.
Packaging Changeover
Rapidly reposition the product pusher end point on a packaging line during format size changes using the external M12x1.25 adjuster screw.
Prototype Positioning
Establish optimal trial end positions for testing actuators on new assembly machinery before locking down the final mechanical dimensions.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X40-20S the Right Cylinder?
If your setup requires less thrust, the 32mm bore variant delivers 402.1N push at 0.5 MPa, whereas stepping up to the 50mm bore provides 981.8N push for heavier loads. A fixed-stroke ACQ cylinder is sufficient if your extend position never needs field adjustments. When ordering this adjustable model, confirm the 40mm bore, 40mm full stroke, 20mm window, the integrated magnet (-S), and your preferred rod-end thread (default female M8x1.25 or male M14x1.5).
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 ACQJ40X40-20S FAQ
This cylinder provides 628.3N push and 527.8N pull at 0.5 MPa, 879.6N push at 0.7 MPa, and a maximum push of 128 kgf at 1.0 MPa. The usable extend range is 20-40mm (a 40mm full stroke shortened by the 20mm window).
An external M12x1.25 threaded stop with a lock nut limits the extend travel, while the retract stroke stays unchanged. The adjustment alters stroke length only, so force remains identical to a standard ACQ. The cylinder uses fixed elastomer bumpers and does not hold loads on air loss; use an external rod lock for fail-safe holding.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
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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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