Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-20S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-20S 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 ACQJ40X20-20S
The AirTAC ACQJ40X20-20S is a double-acting JIS compact cylinder featuring an external threaded stop and lock nut that limits 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 your machinery without swapping parts. 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 0.5 MPa. This unit includes a 16mm piston rod, an M12x1.25 external adjuster thread, and a built-in magnet for position sensing. It relies on a fixed NBR elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-20S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-20S |
|---|---|
| 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 ACQJ40X20-20S
| 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 ACQJ40X20-20S Is Used
Multi-Format Machining Stops
Dial in the extend stroke from 0 to 20mm on CNC loading stations to accommodate different raw material lengths without fabricating custom spacer blocks.
Variable Depth Carton Sealing
Adjust the rod extension on the fly to match varying box heights on packaging lines, ensuring precise flap folding without changing out the entire actuator.
Product Changeover Diverters
Fine-tune the end position of sorting gates during rapid product family changeovers, allowing operators to set exact rejection distances mechanically.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-20S the Right Cylinder?
Selecting this 40mm bore actuator provides 879.6N of push force at 0.7 MPa, sitting neatly between the 32mm bore (562.9N push) and the 50mm bore (1374.4N push). If your application never requires end-position modifications, a fixed-stroke ACQ cylinder will suffice. When ordering, confirm the 40mm bore, 20mm full stroke, 20mm adjustment window, the S magnet option, and your required rod-end thread (default female M8x1.25).
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 ACQJ40X20-20S FAQ
This 40mm bore cylinder 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 full stroke features a 20mm adjustment window, providing a usable extend range of 0-20mm.
The external M12x1.25 threaded stop with lock nut physically limits how far the rod extends, changing only the stroke length, not the piston area, so force remains identical to a standard ACQ. Deceleration is handled by fixed elastomer bumpers, and the included S magnet works with both reed and solid-state electronic switches.
Authorized Export Seller
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.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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