Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 300mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke300 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20SB
The ACQJ40X300-20SB is a double-acting JIS compact cylinder with a 300mm stroke and a 40mm bore. An external threaded stop with a lock nut lets you fine-tune the extend end position on the machine, yielding a usable extend range of 280-300mm. The retract stroke remains unaffected. Because the piston area is unchanged, force is identical to a standard ACQ of this bore.
This long-stroke made-to-order variant exceeds the 100mm standard maximum for this bore size. It features a male M14x1.5 piston rod end for direct load coupling, a PT1/8 port, and a built-in piston magnet for reed or solid-state switches. The fixed NBR elastomer bumper decelerates the load at stroke ends, and the external adjuster thread is M12x1.25.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 300 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 ACQJ40X300-20SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 ACQJ40X300-20SB Is Used
Machining Fixture Stops
Dial in the extend position of clamping arms on a CNC machining center during part-changeover without swapping hardware.
Sorting Diverter Arms
Adjust the extend reach of a package diverter on a logistics conveyor to handle varying box sizes on the fly.
Assembly Press Setup
Set trial end positions for pressing subcomponents in an electronics assembly line to prevent over-travel.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20SB the Right Cylinder?
Selecting this 40mm bore yields a push force of 628.3N at 0.5MPa. If your application requires less force, a 32mm bore provides 402.1N push, whereas a 50mm bore offers 981.8N for heavier demands. If exact end-position tuning is unnecessary, a fixed-stroke ACQ suffices. Confirm the 40mm bore, 300mm full stroke, 20mm window, S magnet, and B male rod thread when ordering.
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 ACQJ40X300-20SB FAQ
Force is identical to a standard ACQ: push is 628.3N and pull is 527.8N at 0.5MPa, push is 879.6N at 0.7MPa, and max push is 128kgf at 1.0MPa. The full stroke is 300mm, the adjustable window is 20mm, and the usable extend range is 280-300mm.
The external M12x1.25 threaded stop with lock nut limits the extend stroke only; the retract stroke is unaffected. The fixed NBR elastomer bumper decelerates the load at stroke ends. 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
Request a Quote for Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20SB
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.