Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X40-20B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X40-20B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø32mm bore and 40mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ32 mm
- Full stroke40 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X40-20B
The AirTAC ACQJ32X40-20B is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend stroke. You can fine-tune the usable extend range from 20mm up to the full 40mm directly on your machine, while the retract stroke remains unaffected. It features a 32mm bore, a 16mm piston rod, and a male M14x1.5 rod-end thread (-B) that couples directly to your load.
Because the piston area is unchanged, output force is identical to a standard ACQ of this size, delivering 402.1N push at 0.5MPa. The body incorporates sensor grooves for magnetic switches, though this specific configuration ships without a magnet. Deceleration is handled by a fixed NBR elastomer bumper at each end, providing compact shock absorption without adjustable air cushions.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X40-20B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X40-20B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø32 mm |
| Full stroke | 40 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 (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 302 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 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 ACQJ32X40-20B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×40 | 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 ACQJ32X40-20B Is Used
Machining Fixture Clamps
Dial in the exact clamp extension on a CNC machining center during setup, accommodating varying raw material thicknesses without swapping out cylinder hardware.
Packaging Diverters
Adjust the extend stop on a packaging line diverter to match different carton widths, ensuring precise product routing during rapid format changeovers.
Assembly Press Stops
Set trial end positions on an electronic assembly press, fine-tuning the 20-40mm stroke window to apply contact pressure without damaging delicate components.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X40-20B the Right Cylinder?
When sizing this 32mm bore unit, stepping down to a 25mm bore yields 245.4N push at 0.5MPa, while moving up to a 40mm bore provides 628.3N. If your application never requires end-position adjustments, a fixed-stroke standard ACQ cylinder will suffice. To order correctly, confirm the 32mm bore, 40mm full stroke, 20mm adjustable window, the male rod thread, and whether you need the -S magnet option for electronic or reed switch sensing.
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 ACQJ32X40-20B FAQ
This 32mm bore cylinder operates at 0.15-1.0MPa and delivers 402.1N push and 301.6N pull at 0.5MPa, 562.9N push at 0.7MPa, and a maximum push of 82kgf at 1.0MPa. The full stroke is 40mm with a 20mm adjustable window, giving a usable extend range of 20-40mm. The retract stroke is unaffected, and it uses PT1/8 ports.
An external M12x1.25 threaded stop with a lock nut limits how far the rod extends, allowing on-machine tuning without changing parts. This mechanism changes stroke length only, so output force remains identical to a standard ACQ. The cylinder uses a fixed NBR elastomer bumper at each end for deceleration rather than an adjustable air cushion, and this model ships without a sensor magnet.
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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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