Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-10SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-10SB 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 ACQJ40X20-10SB
The ACQJ40X20-10SB is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend stroke. You can tune the usable extend range from 10 mm up to the full 20 mm directly on the machine, while the retract stroke remains unaffected. It includes a male M14x1.5 rod-end thread for direct load coupling and a built-in piston magnet for position sensing.
Because the adjuster only alters travel length and not piston area, the output force equals a standard ACQ of the same bore. The 40 mm bore generates 628.3 N of push force and 527.8 N of pull force at 0.5 MPa, scaling to 879.6 N push at 0.7 MPa. The body uses fixed elastomer bumpers for end-of-stroke deceleration rather than adjustable air cushions, and the standard PT1/8 port handles airflow within the 0.15-1.0 MPa operating range.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-10SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-10SB |
|---|---|
| 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 ACQJ40X20-10SB
| 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 ACQJ40X20-10SB Is Used
Machining Fixture Stops
Dial in the exact 10 to 20 mm extend position on a machining fixture to accommodate varying raw material thicknesses without machining new stop blocks.
Assembly Line Changeover
Rapidly adjust the extend endpoint during product changeover on an assembly line, using the external M12x1.25 stopper thread to set new reject or push distances.
Prototype Positioning
Test trial end positions on a new packaging machine prototype, fine-tuning the extend stroke by up to 10 mm to find the optimal transfer point before finalizing the design.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-10SB the Right Cylinder?
If you need less push force, the 32 mm bore delivers 402.1 N at 0.5 MPa, whereas stepping up to the 50 mm bore provides 981.8 N. Choose this 40 mm model when your application requires approximately 628 N of thrust within a 20 mm total travel window. If the exact 20 mm extend position never varies, a fixed-stroke ACQ cylinder is sufficient. To order this adjustable version, confirm the 40 mm bore, 20 mm full stroke, 10 mm window, the -S magnet, 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 ACQJ40X20-10SB FAQ
The usable extend range is 10-20 mm. It provides a push force of 628.3 N and a pull force of 527.8 N at 0.5 MPa, a push force of 879.6 N at 0.7 MPa, and a maximum push force of 128 kgf at 1.0 MPa. The adjustable window is 10 mm.
The external threaded stop with a lock nut limits the extend stroke without changing the piston area, meaning the force is identical to a standard ACQ. The retract stroke is unaffected. The cylinder relies on fixed elastomer bumpers for deceleration, and the built-in magnet works with reed or electronic solid-state switches.
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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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