Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X35-20S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X35-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 35mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke35 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X35-20S
The AirTAC ACQJ40X35-20S is a double-acting JIS compact cylinder with a 40mm bore and a 35mm full stroke. It features an external M12x1.25 threaded stop and lock nut that limits the rod extension, providing a usable extend range of 15-35mm. This allows precise on-machine end-position tuning without swapping parts. The retract stroke remains unaffected.
Because the piston area is unchanged, output force is identical to a standard ACQ of this bore. The cylinder delivers 628.3N push and 527.8N pull at 0.5 MPa. It includes a -S piston magnet compatible with reed or solid-state switches, and fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X35-20S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X35-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 35 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 ACQJ40X35-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×35 | 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 ACQJ40X35-20S Is Used
Machining Fixture Stops
Dial in the exact clamping extension on machining fixtures during tooling setups, accommodating different part heights without fabricating new spacers.
Packaging Changeover
Rapidly reposition the product pusher end-point on a packaging line when switching between carton sizes, using the external stop to set the new limit quickly.
Assembly Press Trials
Safely test and incrementally adjust the extend depth on an assembly press during initial prototype runs, preventing damage to delicate components.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X35-20S the Right Cylinder?
Choosing this 40mm bore provides 628.3N push at 0.5 MPa, sitting between the 32mm bore (402.1N push) and the 50mm bore (981.8N push). If your application never requires stroke adjustments, a fixed-stroke ACQ cylinder suffices. When ordering this adjustable model, confirm the 40mm bore, 35mm full stroke, 20mm adjustment window, the -S magnet for sensing, and the default 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 ACQJ40X35-20S FAQ
It delivers 628.3N push and 527.8N pull at 0.5 MPa, 879.6N push at 0.7 MPa, and a maximum push of 128 kgf at 1.0 MPa. The 20mm adjustment window provides a usable extend range of 15-35mm.
No, the adjuster only limits the extend length, meaning the force is identical to a standard ACQ. The retract stroke is unaffected. The cylinder uses fixed elastomer bumpers, and the included -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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