Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-20S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 75mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke75 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-20S
The AirTAC ACQJ40X75-20S is a double-acting JIS compact cylinder with a 40mm bore and 75mm full stroke. An external M12x1.25 threaded stop with lock nut limits the extend end position, giving a usable forward range of 55 to 75mm. The return stroke remains at the standard 75mm. A built-in piston magnet (-S) allows tracking by reed or solid-state electronic switches.
Because the adjuster only restricts forward travel, the piston area stays the same, meaning force is identical to a standard ACQ. Expect 628.3N push and 527.8N pull at 0.5MPa. The unit features a 16mm rod, PT1/8 port, and fixed NBR elastomer bumpers at both ends for end-of-travel deceleration.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-20S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 75 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 ACQJ40X75-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×75 | 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 ACQJ40X75-20S Is Used
Machining Fixture Stops
Dial in the exact clamping depth on a CNC fixture during setup or when swapping part programs, avoiding the need to machine custom spacers.
Carton Forming Limits
Adjust the pusher end position on a packaging line to handle different box heights during product changeover without swapping cylinders.
Prototype Press Testing
Find the optimal engagement distance on a laboratory press by tweaking the extend stop, testing various end positions safely before finalizing the design.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-20S the Right Cylinder?
This 40mm bore yields 628.3N push at 0.5MPa. If you need less force, step down to a 32mm bore (402.1N push); if your application requires more, move up to a 50mm bore (981.8N push). A non-adjustable ACQ40X75 works fine if your end position never changes. When ordering, confirm the 75mm full stroke, the 20mm adjuster window, the -S magnet, and the default female M8x1.25 rod-end 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 ACQJ40X75-20S FAQ
It delivers 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 75mm with a 20mm adjuster window, providing a usable extend range of 55 to 75mm. Operating pressure is 0.15-1.0MPa.
No, the external M12x1.25 stop only shortens the forward travel distance; the piston area is unchanged so force remains identical to a standard ACQ. The retract stroke is unaffected, and fixed elastomer bumpers handle end-of-travel deceleration instead of an adjustable air cushion.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
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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