Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-20SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-20SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 25mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke25 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-20SB
The ACQJ40X25-20SB is a double-acting JIS compact cylinder with a 40mm bore and a 25mm full stroke. An external threaded stop with a lock nut limits the extend travel, providing a usable extend range of 5-25mm. The retract stroke remains completely unaffected. Because the piston area is unchanged, output force equals a standard ACQ, delivering 628.3N push at 0.5MPa.
This unit features a male M14x1.5 piston rod end for direct load coupling and a PT1/8 port. It includes a fixed elastomer bumper at each end for end-of-stroke deceleration. The built-in piston magnet works with reed or electronic solid-state switches, and the M12x1.25 adjuster thread allows precise on-machine end-position tuning.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-20SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-20SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 25 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 ACQJ40X25-20SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 ACQJ40X25-20SB Is Used
Machining Fixture Stops
Dial in the exact extend position from 5 to 25mm on a CNC lathe loader without machining custom spacers during part-changeover.
Carton Sealing Tampers
Adjust the extend limit on the fly to match varying box heights, ensuring consistent flap folding without reprogramming the PLC.
Press Assembly Stations
Set trial end positions for bearing insertion, relying on the fixed elastomer bumper to decelerate the rod near the 25mm limit.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-20SB the Right Cylinder?
If 628.3N push at 0.5MPa is insufficient, step up to the 50mm bore providing 981.8N push; if lower force is acceptable, the 32mm bore offers 402.1N push. A fixed-stroke ACQ suffices if your end position never varies. Confirm ordering essentials: 40mm bore, 25mm 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 ACQJ40X25-20SB FAQ
It provides 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 full stroke is 25mm with a 20mm window, yielding a usable extend range of 5-25mm.
No, the adjuster only changes stroke length, so force remains identical to a standard ACQ. The cylinder has fixed elastomer bumpers, not adjustable cushions. It will not hold a load on air loss, so an external rod lock is needed for fail-safe holding.
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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