Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-20
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-20 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 20mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke20 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-20
The AirTAC ACQJ40X20-20 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 range from 0 mm up to the full 20 mm stroke directly on the machine, while the retract stroke remains completely unaffected. The piston area is unchanged, so the output force is identical to a standard ACQ of the same bore.
This 40 mm bore unit uses a PT1/8 port and delivers 628.3 N of push force at 0.5 MPa. It features a fixed NBR elastomer bumper at each end for end-of-stroke deceleration and includes standard magnetic-switch grooves, though this specific configuration ships without a magnet. The external adjuster uses an M12x1.25 thread, and the default female rod-end thread is M8x1.25.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-20 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-20 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 20 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 ACQJ40X20-20
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 ACQJ40X20-20 Is Used
Machining Fixture Stops
Dial in the extend position from 0 to 20 mm on a CNC machining fixture to accommodate varying raw material thicknesses without machining new stop collars.
Assembly Line Changeover
Rapidly reconfigure the extend endpoint during automated assembly line product changeovers to handle different component widths on the same station.
Carton Forming Trials
Test and set precise trial end positions for packaging flaps or folding mechanisms on a carton erector, tweaking the stroke length until the fold is perfect.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-20 the Right Cylinder?
When sizing this 40 mm bore actuator, stepping down to a 32 mm bore yields 402.1 N of push force at 0.5 MPa, while stepping up to a 50 mm bore provides 981.8 N. If your application never requires end-position variation, a fixed-stroke ACQ cylinder is simpler and entirely sufficient. For this adjustable model, confirm the 40 mm bore, the 20 mm full stroke, the 20 mm adjustable window, the female M8x1.25 rod thread, and whether you need the S magnet option 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 ACQJ40X20-20 FAQ
This 40 mm bore cylinder provides 628.3 N push and 527.8 N pull force at 0.5 MPa, 879.6 N push at 0.7 MPa, and a maximum push of 128 kgf at 1.0 MPa. The 20 mm extend stroke can be shortened by up to 20 mm, giving a usable extend range of 0-20 mm.
No, the adjuster only changes the extend stroke length, not the piston area, so force remains identical to a standard ACQ. The cylinder uses a fixed NBR elastomer bumper at each end for deceleration; it is not an adjustable air cushion. For high-speed or high-energy loads, use an external shock absorber.
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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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Related AirTAC ACQJ Compact Cylinders
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