Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 30mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke30 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20S
The AirTAC ACQJ40X30-20S 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 forward stroke on the machine across a 10 to 30 mm usable range without changing parts. The retract stroke remains unaffected, and the M12x1.25 adjuster thread allows precise end-position setting.
Because the piston area is unchanged, output force is identical to a standard ACQ of this bore, delivering 628.3 N push and 527.8 N pull at 0.5 MPa. This 40 mm bore unit features a 16 mm rod, PT1/8 porting, and fixed elastomer bumpers at both ends. The built-in magnet (-S) supports reed or solid-state switches in the integrated grooves.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 30 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 ACQJ40X30-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×30 | 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 ACQJ40X30-20S Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC machining center during part changeovers, utilizing the 10 to 30 mm forward travel window to accommodate different raw material widths.
Carton Forming Arms
Adjust the folding arm extension on packaging lines to handle varying box sizes without swapping out the entire pneumatic assembly or installing shims.
Electronic Test Probes
Set precise probe descent depths on PCB testing stations to prevent board damage, tweaking the stop position based on specific connector heights.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20S the Right Cylinder?
If you need less force, the 32 mm bore provides a 402.1 N push at 0.5 MPa, while stepping up to the 50 mm bore yields 981.8 N. Choose this 40 mm model when your setup requires approximately 628 N of thrust alongside on-machine extend tuning. A fixed-stroke ACQ cylinder is sufficient if your end position never varies. Confirm your ordering details: 40 mm bore, 30 mm full stroke, 20 mm adjuster window, -S magnet, and 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 ACQJ40X30-20S FAQ
It delivers 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 30 mm with a 20 mm adjustment window, providing a usable extend range of 10 to 30 mm.
The external M12x1.25 threaded stop with lock nut mechanically limits how far the rod extends, shortening the forward stroke without altering piston area, so force remains identical to a standard ACQ. Fixed NBR elastomer bumpers absorb impact at both ends, and the -S magnet works with reed or solid-state switches.
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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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