Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-75SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-75SB 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 ACQJ40X80-75SB
The ACQJ40X80-75SB is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut to precisely limit the extend stroke. You can fine-tune the rod extension on the machine across a usable range of 5 to 80 mm, while the retract stroke remains completely unaffected. Because the piston area stays the same, output force is identical to a standard ACQ of this 40 mm bore.
This unit includes a male M14x1.5 rod-end thread for direct load coupling and a built-in piston magnet compatible with reed or solid-state switches. It relies on a fixed NBR elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion. Operating pressure spans 0.15 to 1.0 MPa, with a proof rating of 1.5 MPa.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-75SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-75SB |
|---|---|
| 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 ACQJ40X80-75SB
| 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 ACQJ40X80-75SB Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC lathe fixture during setup, allowing operators to shorten the extend stroke from 80 mm down to 5 mm without machining custom spacers.
Product Changeover Diverter
Adjust the stroke of a packaging line diverter arm on the fly to accommodate varying carton widths, ensuring precise routing without swapping out the entire cylinder.
Press Trial Positions
Test different engagement depths on an assembly press by tweaking the external stop, finding the optimal end position for delicate components before finalizing the mechanical setup.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-75SB the Right Cylinder?
Choosing this 40 mm bore yields a push force of 628.3 N and a pull of 527.8 N at 0.5 MPa. Stepping down to a 32 mm bore drops the push to 402.1 N, whereas moving up to a 50 mm bore increases it to 981.8 N. If your application never requires end-position adjustments, a fixed-stroke ACQ cylinder will suffice. When ordering, verify the 80 mm full stroke, the 75 mm adjustment window, the -S magnet, and the -B male rod 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 ACQJ40X80-75SB FAQ
It delivers a push force of 628.3 N and a pull of 527.8 N at 0.5 MPa, with a push of 879.6 N at 0.7 MPa and a maximum push of 128 kgf at 1.0 MPa. The full stroke is 80 mm, and the external M12x1.25 adjuster allows the extend stroke to be shortened by up to 75 mm, giving a usable extend range of 5 to 80 mm.
No, the external stop only limits how far the rod extends; it does not alter the piston area, so the force remains identical to a standard ACQ. The cylinder uses fixed NBR bumpers for deceleration and will not hold its load on air loss, so an external rod lock or pilot-operated check valve is recommended 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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