Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-75S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-75S 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 ACQJ40X75-75S
The AirTAC ACQJ40X75-75S is a double-acting, single-rod JIS compact cylinder featuring an external threaded stop with a lock nut that restricts the extend end position. You can fine-tune the usable extend travel anywhere from 0 up to 75 mm directly on the machine without swapping parts. The retract stroke remains fixed at the full 75 mm.
Because the piston area stays the same, output force is identical to a standard ACQ of this bore, delivering 628.3 N push at 0.5 MPa. The body uses a compact riveted design with fixed elastomer bumpers at each end. An integrated piston magnet (-S option) allows tracking by reed or solid-state switches.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-75S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-75S |
|---|---|
| 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 ACQJ40X75-75S
| 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 ACQJ40X75-75S Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC lathe fixture during product changeover, using the external stop to set the extend endpoint between 0 and 75 mm.
Carton Sealing Turrets
Adapt sealing head descent on the fly for varying package heights, preventing over-travel by limiting the extend stroke while keeping the retract cycle fast.
Assembly Press Positioning
Establish trial end positions for pressing bearings without machining new spacers, relying on the lock nut to hold the 0-75 mm extend setting securely.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-75S the Right Cylinder?
If your setup requires less push at 0.5 MPa, the ACQJ32 bore yields 402.1 N, whereas stepping up to the ACQJ50 bore provides 981.8 N. Choose this 40 mm bore when you need approximately 628.3 N of push force and on-site end-position tuning. If the application never requires stroke adjustments, a fixed-stroke ACQ cylinder will suffice. When ordering, verify the 40 mm bore, 75 mm full stroke, 75 mm adjuster 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 ACQJ40X75-75S FAQ
It provides 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 usable extend range is 0-75 mm (a 75 mm full stroke minus the 75 mm adjustment window).
No, the adjuster changes only the extend stroke length, not the piston area, so force remains identical to a standard ACQ. The retract stroke is unaffected. Deceleration relies on a fixed elastomer bumper, and the -S magnet works with reed or solid-state switches.
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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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