Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20SB 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 ACQJ40X30-20SB
The AirTAC ACQJ40X30-20SB is a double-acting JIS compact cylinder with a 40mm bore and a 30mm full stroke. An external M12x1.25 threaded stop and lock nut lets you fine-tune the extend end position on the machine, creating a usable extend range of 10-30mm. The retract stroke remains completely unaffected by this adjustment.
Because the piston area is unchanged, output force stays identical to a standard ACQ of this size, delivering 628.3N push at 0.5MPa. This SB variant includes a male M14x1.5 rod end for direct load coupling and a built-in piston magnet compatible with reed or solid-state switches. Fixed NBR elastomer bumpers absorb impact at both ends without needing adjustable air cushions.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20SB |
|---|---|
| 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 ACQJ40X30-20SB
| 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 ACQJ40X30-20SB Is Used
Machining Fixture Stops
Dial in the exact clamping extension on CNC machining fixtures without swapping out cylinder hardware during product changeovers.
Packaging Tucking Arms
Adjust the tucking arm reach on the fly for varying carton sizes, ensuring precise flap folding on automated packaging lines.
Assembly Press Positioning
Set trial end positions for light-duty pressing and seating tasks in automated assembly cells to accommodate different part heights.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20SB the Right Cylinder?
Selecting this 40mm bore actuator provides 628.3N push and 527.8N pull at 0.5MPa. If your application requires less force, stepping down to a 32mm bore yields 402.1N push, while moving up to a 50mm bore offers 981.8N push. A fixed-stroke ACQ cylinder is sufficient if your end position never varies. When ordering, confirm the 40mm bore, 30mm full stroke, 20mm adjustment window, the S magnet option, and the B male rod 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 ACQJ40X30-20SB FAQ
It delivers 628.3N push and 527.8N pull at 0.5MPa, 879.6N push at 0.7MPa, and a maximum push of 128kgf at 1.0MPa. The full stroke is 30mm with a 20mm adjustment window, allowing a usable extend range of 10-30mm. The retract stroke remains fixed at 30mm.
An external M12x1.25 threaded stop with a lock nut limits the extend travel, allowing on-machine tuning without changing parts. The adjustment alters stroke length only, so force remains identical to a standard ACQ. Fixed elastomer bumpers decelerate the load at the ends, and the S magnet works with reed or electronic switches.
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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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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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