Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-50
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-50 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 70mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke70 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-50
The AirTAC ACQJ40X70-50 is a double-acting JIS compact cylinder featuring an external extend stop. A threaded adjuster with a lock nut lets you set the forward end position anywhere in a 20 to 70 mm usable range. The full 70 mm stroke can be shortened by up to 50 mm directly on your equipment, while the retract stroke remains completely unaffected.
Output force stays identical to a standard ACQ because the piston area is unchanged, yielding 628.3 N push and 527.8 N pull at 0.5 MPa. This unit includes a fixed NBR elastomer bumper at each end for basic deceleration and features built-in sensor grooves. It ships without a magnet, so adding a separate piston magnet is required for switch activation.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-50 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-50 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 70 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 ACQJ40X70-50
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×70 | 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 ACQJ40X70-50 Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC machining fixture during setup, shortening the extend stroke by up to 50 mm without machining new spacers.
Carton Size Changeover
Adapt a packaging line flap folder for different box dimensions by turning the external stop screw, hitting varied end positions rapidly.
Assembly Press Trials
Test multiple insertion depths on an assembly press by tweaking the forward stop within the 20 to 70 mm window before finalizing the mechanical setup.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-50 the Right Cylinder?
If you need less push force, the adjacent bore 32 provides 402.1 N push at 0.5 MPa, or step up to bore 50 for 981.8 N. A fixed-stroke ACQ is adequate if your end position never varies. Confirm your ordering details: 40 mm bore, 70 mm full stroke, 50 mm adjuster window, female M8x1.25 rod end, and PT1/8 port.
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 ACQJ40X70-50 FAQ
The usable extend range is 20 to 70 mm. Force is identical to a standard ACQ: 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push at 0.7 MPa, and a maximum push of 128 kgf at 1.0 MPa.
The M12x1.25 threaded stop with lock nut limits only the forward extend stroke; the retract stroke is unaffected. Because the adjuster only limits travel, the piston area and force remain unchanged. The cylinder uses a fixed elastomer bumper, not an adjustable air cushion.
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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.
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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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