Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-20SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-20SB 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 ACQJ40X50-20SB
The AirTAC ACQJ40X50-20SB is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend end position. You can fine-tune the usable extend stroke from 30mm up to the full 50mm directly on your machinery, while the retract stroke remains completely unaffected.
Because the piston area is unchanged, force is identical to a standard ACQ of this bore, delivering 628.3N push at 0.5 MPa. This 40mm bore unit features a male M14x1.5 piston rod end, a PT1/8 port, and fixed elastomer bumpers at both ends. The included -S magnet works with reed or electronic solid-state switches for position sensing.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-20SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-20SB |
|---|---|
| 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 ACQJ40X50-20SB
| 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 ACQJ40X50-20SB Is Used
Fixture Position Tuning
Dial in the exact extend stop from 30 to 50mm during setup-varying fixture operations without machining new spacers.
Product Changeover Stops
Swiftly reposition the end-of-stroke limit for different product sizes on a packaging line using the external M12x1.25 adjuster.
Trial End Positions
Test various extend endpoints on assembly machinery to find the optimal contact point before locking the nut down.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-20SB the Right Cylinder?
If your application requires less force, the 32mm bore variant provides 402.1N push at 0.5 MPa, whereas stepping up to the 50mm bore yields 981.8N. If the extend position never needs on-machine tweaking, a fixed-stroke ACQ cylinder is sufficient. For this adjustable model, verify your ordering essentials: 40mm bore, 50mm full stroke, 20mm window, -S magnet, and -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 ACQJ40X50-20SB 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 full stroke is 50mm with a 20mm window, giving a usable extend range of 30-50mm. The rod is 16mm with a male M14x1.5 thread, and the external adjuster thread is M12x1.25.
No, the threaded stop changes the extend stroke length only, so force remains identical to a standard ACQ. The retract stroke is unaffected. Deceleration is handled by fixed elastomer bumpers, not an adjustable air cushion, so external shock absorbers are recommended for high-energy loads.
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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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