Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X40-20B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X40-20B 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 ACQJ40X40-20B
The AirTAC ACQJ40X40-20B 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 the machine. The retract stroke remains completely unaffected by this mechanism.
Because the adjustment only alters travel length and not the piston area, the output force stays identical to a standard ACQ of the same bore. You get 628.3N of push force and 527.8N of pull force at 0.5 MPa. This variant includes a male M14x1.5 rod-end thread for direct load coupling, a PT1/8 port, and fixed NBR elastomer bumpers at both ends to absorb end-of-stroke impact.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X40-20B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X40-20B |
|---|---|
| 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 ACQJ40X40-20B
| 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 ACQJ40X40-20B Is Used
Machining Fixture Stops
Dial in the exact clamping extension on CNC machining fixtures during product changeover, avoiding the need to manufacture custom spacer blocks for each part.
Packaging Tucking Arms
Adjust the tucking arm reach on a packaging line to accommodate varying carton depths, setting the extend endpoint precisely between 20mm and 40mm.
Assembly Press Positioning
Establish trial end positions for light pressing operations on an automated assembly line, tweaking the stroke length on the machine without replacing hardware.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X40-20B the Right Cylinder?
When sizing this unit, stepping down to a 32mm bore yields 402.1N push at 0.5 MPa, while stepping up to a 50mm bore provides 981.8N push at 0.5 MPa. Choose this adjustable model if your fixture setup or product changeover requires varying extend endpoints without swapping cylinders; a fixed-stroke ACQ is sufficient if the end position never changes. Confirm your ordering essentials: 40mm bore, 40mm full stroke, 20mm window, male rod thread (-B), and whether you need the magnet (-S) for position 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 ACQJ40X40-20B FAQ
This cylinder delivers 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 full stroke is 40mm with a 20mm adjustment window, providing a usable extend range of 20-40mm.
An external M12x1.25 threaded stop with a lock nut mechanically limits the extend length, meaning force remains identical to a standard ACQ since piston area is unchanged. The cylinder uses fixed elastomer bumpers rather than adjustable air cushions, and it will not hold a load on air loss; use an external rod lock for fail-safe holding.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC ACQJ Compact Cylinders
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