Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-20S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 50mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke50 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-20S
The AirTAC ACQJ40X50-20S is a double-acting JIS compact cylinder with a 40mm bore and a 50mm full stroke. An external threaded stop with a lock nut limits the extend end position, providing a usable extend range of 30 to 50mm. The retract stroke remains unaffected. Because the piston area is unchanged, output force is identical to a standard ACQ of this bore.
This unit features a 16mm piston rod, a PT1/8 port, and a female M8x1.25 rod-end thread. The adjuster itself uses an M12x1.25 thread. It includes a fixed elastomer bumper at each end for end-of-stroke deceleration and carries the -S magnet option, making it compatible with both reed and electronic solid-state switches.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-20S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 50 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 ACQJ40X50-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 ACQJ40X50-20S Is Used
Machining Fixture Stops
Dial in the exact extend position for varying part lengths on a CNC machining fixture without swapping out cylinder hardware.
Product Changeover Diverter
Quickly reposition a conveyor lane diverter to accommodate new package dimensions by adjusting the external stop nut.
Packaging Machine Trial Positions
Test and fine-tune the end-of-stroke pusher location during packaging line setup to find the optimal sealing or folding point.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-20S the Right Cylinder?
If you need slightly less force, the 32mm bore yields 402.1N push at 0.5MPa, while the 50mm bore provides 981.8N if your application requires more thrust. If your extend position never needs on-machine tuning, a fixed-stroke ACQ cylinder suffices. When ordering this adjustable model, confirm the 40mm bore, 50mm full stroke, 20mm window, -S magnet, and female M8x1.25 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 ACQJ40X50-20S FAQ
The usable extend range is 30-50mm (full 50mm stroke minus the 20mm window). Force is identical to a standard ACQ: 628.3N push and 527.8N pull at 0.5MPa, 879.6N push at 0.7MPa, and a maximum push of 128kgf at 1.0MPa.
The M12x1.25 external threaded stop limits the extend stroke only, leaving the retract stroke unaffected. The cylinder uses fixed elastomer bumpers at both ends for deceleration. The -S magnet works with reed or electronic solid-state switches for position sensing.
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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