Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-20S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-20S 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 ACQJ40X70-20S
The AirTAC ACQJ40X70-20S is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut on the extend side. This mechanism allows you to fine-tune the extend end position directly on the machine, providing a usable extend range of 50-70 mm from the 70 mm full stroke. The retract stroke remains completely unaffected by this adjustment.
Because the piston area stays the same, output force is identical to a standard ACQ bore 40 unit, yielding 628.3 N push and 527.8 N pull at 0.5 MPa. The cylinder uses a PT1/8 port and a 16 mm piston rod with a female M8x1.25 rod-end thread. It includes fixed elastomer bumpers at both ends for deceleration and, with the included -S magnet, supports both reed and electronic solid-state switches in its integrated sensor grooves.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-20S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-20S |
|---|---|
| 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 ACQJ40X70-20S
| 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 ACQJ40X70-20S Is Used
Machining Fixture Stops
Dial in the exact clamping extension on a CNC machining fixture to accommodate raw casting variations without swapping out the entire cylinder body.
Carton Changeover Diverters
Adjust the pusher end position on a packaging conveyor line within the 50-70 mm window to handle different carton widths during rapid product changeovers.
Assembly Press Trials
Set precise trial end positions for pressing sub-components on an automated assembly line, allowing operators to tweak the 20 mm window for optimal insertion depth.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-20S the Right Cylinder?
When sizing this model, stepping down to a 32 mm bore yields 402.1 N push at 0.5 MPa, while stepping up to a 50 mm bore provides 981.8 N push at 0.5 MPa. If your application never requires altering the extend endpoint, a fixed-stroke ACQ40X70 cylinder is simpler and suffices. To order this adjustable version correctly, confirm the 40 mm bore, 70 mm full stroke, 20 mm adjustable window, the -S magnet option, and your preferred 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 ACQJ40X70-20S FAQ
This cylinder 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 full stroke is 70 mm with a 20 mm adjustable window, giving a usable extend range of 50-70 mm.
The external M12x1.25 threaded stop with lock nut limits only the extend stroke length, meaning force remains identical to a standard ACQ since piston area is unchanged. Deceleration relies on fixed elastomer bumpers at each end, not adjustable air cushions. The -S piston magnet works with both reed and electronic solid-state switches.
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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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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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