Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40S 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 ACQJ40X70-40S
The AirTAC ACQJ40X70-40S is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend end position. With a full stroke of 70mm and a 40mm adjustment window, the usable extend range is 30 to 70mm. The retract stroke remains completely unaffected by this mechanism. A 16mm piston rod and PT1/8 porting ensure reliable pneumatic performance.
Because the piston area is unchanged, the output force is identical to a standard ACQ of the same bore, delivering 628.3N push and 527.8N pull at 0.5MPa. The cylinder relies on a fixed NBR elastomer bumper at each end for deceleration rather than an adjustable air cushion. Equipped with a magnet (-S), the body grooves accommodate both reed and solid-state electronic switches for position sensing.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40S |
|---|---|
| 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 ACQJ40X70-40S
| 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 ACQJ40X70-40S Is Used
Machining Fixture Stops
Dial in the exact extend position on a CNC machining fixture to accommodate varying part thicknesses without machining new stop collars.
Carton Forming Changeover
Adjust the extend stroke on a packaging line carton erector to quickly switch between different box sizes during product changeover.
Assembly Press Tuning
Set trial end positions on an assembly press to test different insertion depths for electronic connector mating before finalizing the mechanical setup.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40S the Right Cylinder?
Choosing this 40mm bore provides 628.3N push force at 0.5MPa. If your application requires less force, stepping down to a 32mm bore yields 402.1N push, while moving up to a 50mm bore offers 981.8N push for heavier loads. A fixed-stroke ACQ is sufficient if your end position never requires on-machine tuning. When ordering, confirm the 70mm full stroke, 40mm adjustment window, the -S magnet option, 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 ACQJ40X70-40S FAQ
This cylinder 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 70mm with a 40mm adjustment window, resulting in a usable extend range of 30 to 70mm.
No, the adjuster changes the stroke length only; the force remains identical to a standard ACQ because the piston area is unchanged. Deceleration is handled by a fixed elastomer bumper at each end, not an adjustable air cushion. For high-energy loads, an external shock absorber is recommended.
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Related AirTAC ACQJ Compact Cylinders
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