Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75S 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 ACQJ40X70-75S
The AirTAC ACQJ40X70-75S is a double-acting JIS compact cylinder with a 70mm full stroke and a 75mm adjustable extend window, yielding a usable extend range of 0-70mm. An external M12x1.25 threaded stop and lock nut lets you fine-tune the extend end position directly on the machine without swapping parts. The retract stroke remains completely unaffected by this adjustment.
Because the piston area is unchanged, force output is identical to a standard ACQ of the same bore, delivering 628.3N push and 527.8N pull at 0.5MPa. The cylinder features a 16mm rod, PT1/8 port, and fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration. The included -S piston magnet works with reed or electronic solid-state switches in the body grooves.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75S |
|---|---|
| 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 ACQJ40X70-75S
| 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 ACQJ40X70-75S Is Used
Machining Fixture Stops
Dial in the exact extend position for varying raw material thicknesses on a CNC milling fixture without machining new stop collars.
Carton Changeover Flaps
Rapidly adjust the folding arm end-point during packaging line product size changeovers to accommodate different box widths.
Assembly Press Trial
Safely test and incrementally set the extend end position for a new pressing operation on an automated assembly rig.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75S the Right Cylinder?
If you need slightly less force, the 32mm bore provides 402.1N push at 0.5MPa, or for higher thrust, the 50mm bore yields 981.8N push at 0.5MPa. If your extend position never varies, a fixed-stroke ACQ40X70 is sufficient. To order this adjustable version, confirm the 40mm bore, 70mm full stroke, 75mm window, -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 ACQJ40X70-75S 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 70mm with a 75mm adjustment window, giving a usable extend range of 0-70mm.
No, the adjuster only changes the extend stroke length, so force remains identical to a standard ACQ. The M12x1.25 threaded stop limits extension, while fixed NBR elastomer bumpers decelerate the load at stroke ends. Note that a plain cylinder does not hold its load on air loss; use an external rod lock for fail-safe holding.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC ACQJ Compact Cylinders
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