Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-75B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-75B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 80mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke80 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-75B
The AirTAC ACQJ40X80-75B is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend end position. You can fine-tune the usable extend range from 5 mm up to the full 80 mm on the machine, shortening the stroke by up to 75 mm without swapping parts. The retract stroke remains completely unaffected by this adjustment.
Because the piston area is unchanged, the output force is identical to a standard ACQ of this bore, delivering 628.3 N push at 0.5 MPa. This unit includes a male M14x1.5 rod-end thread for direct load coupling, a 16 mm piston rod, and PT1/8 ports. It relies on fixed elastomer bumpers for end-of-stroke deceleration rather than adjustable air cushions.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-75B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-75B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 80 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 ACQJ40X80-75B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 ACQJ40X80-75B Is Used
Machining Fixture Clamps
Dial in the exact clamping extension on a CNC fixture to accommodate raw parts of varying widths without machining custom spacers.
Carton Forming Stops
Adjust the extend stroke on the fly during packaging line changeovers to accommodate different box depths and flap positions.
Assembly Press Positioning
Set trial end positions for pressing bearings or pins on automated assembly lines, allowing rapid tweaking of the insertion depth.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-75B the Right Cylinder?
Selecting this 40 mm bore provides 628.3 N push and 527.8 N pull at 0.5 MPa. Stepping down to a 32 mm bore drops the push to 402.1 N, while moving up to a 50 mm bore raises it to 981.8 N. If your equipment never requires end-position changes, a fixed-stroke ACQ cylinder is sufficient. When ordering, confirm the 80 mm full stroke, 75 mm adjuster window, the male B rod thread, and whether you need the S magnet option for sensing.
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 ACQJ40X80-75B FAQ
The usable extend range is 5-80 mm (an 80 mm full stroke shortened by up to a 75 mm window). Force is identical to a standard ACQ: push is 628.3 N and pull is 527.8 N at 0.5 MPa, push is 879.6 N at 0.7 MPa, and the maximum push is 128 kgf at 1.0 MPa.
An external M12x1.25 threaded stop with a lock nut limits the extend length without changing the piston area, so force remains unchanged. Fixed NBR bumpers decelerate the rod near stroke ends. The cylinder will not hold its load on air loss, so an external rod lock or pilot-operated check valve is required for fail-safe holding.
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1-Year Warranty
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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