Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-20SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-20SB 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 ACQJ40X20-20SB
The AirTAC ACQJ40X20-20SB is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that restricts the extend end position. With a 20mm full stroke and a 20mm adjustment window, you can fine-tune the usable extend range from 0 to 20mm directly on the machine. The retract stroke remains completely unaffected by this mechanism.
Because the piston area is unchanged, output force is identical to a standard ACQ of the same bore, delivering 628.3N push and 527.8N pull at 0.5MPa. The -B suffix denotes a male M14x1.5 piston rod end for direct load coupling, while the -S suffix equips the integrated magnet for reed or solid-state electronic switches. Deceleration relies on a fixed NBR elastomer bumper at each end rather than an adjustable air cushion.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-20SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-20SB |
|---|---|
| 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 ACQJ40X20-20SB
| 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 ACQJ40X20-20SB Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC machining fixture during part setup without machining custom spacers or swapping components.
Packaging Changeover
Adapt conveyor diverting arms to different carton widths on the fly, ensuring precise product spacing without replacing the actuator.
Assembly Press Tonnage
Establish a precise trial end position for an assembly press, allowing operators to test insertion depths before finalizing the mechanical stop.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-20SB the Right Cylinder?
If you need less push force, the 32mm bore provides 402.1N push at 0.5MPa, whereas stepping up to the 50mm bore yields 981.8N push. A fixed-stroke ACQ is sufficient if your end position never varies. To order this cylinder, confirm the 40mm bore, 20mm full stroke, 20mm adjustment window, the -S magnet requirement, 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 ACQJ40X20-20SB FAQ
The usable extend range is 0-20mm, as the 20mm full stroke can be shortened by up to 20mm. Push force is 628.3N and pull is 527.8N at 0.5MPa, 879.6N push at 0.7MPa, with a maximum push of 128kgf at 1.0MPa. The retract stroke is unaffected.
An external M12x1.25 threaded stop with a lock nut limits how far the rod extends, allowing on-machine tuning without new parts. Because the piston area remains unchanged, force is identical to a standard ACQ. The cylinder uses a fixed NBR elastomer bumper for deceleration, not an adjustable air cushion.
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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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