Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 45mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke45 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20S
The ACQJ40X45-20S is a double-acting JIS compact cylinder featuring an external threaded stop and lock nut that limits the extend end position. You can fine-tune the forward stroke on the machine across a 25 to 45 mm usable range, shortening the 45 mm full stroke by up to 20 mm without swapping parts. The retract stroke remains completely unaffected.
Because the piston area is unchanged, output force is identical to a standard ACQ of this bore, delivering 628.3 N push and 527.8 N pull at 0.5 MPa. The 16 mm rod uses an M12x1.25 adjuster thread, and the body relies on fixed NBR elastomer bumpers at each end rather than adjustable air cushions. The integrated -S magnet works seamlessly with both reed and solid-state electronic switches.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 45 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 ACQJ40X45-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×45 | 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 ACQJ40X45-20S Is Used
Machining Fixture Clamps
Dial in the exact clamping reach on a CNC machining center during part changeovers, shortening the extend stroke to accommodate varying raw material widths.
Carton Forming Stops
Adjust the folding flap end position on packaging lines for different box depths without replacing the cylinder or altering the retract motion.
Assembly Press Positions
Set trial end positions for pressing bearings on automated assembly lines, allowing operators to tweak the 25-45 mm forward travel for delicate components.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20S the Right Cylinder?
If you need slightly less thrust, the 32 mm bore variant provides 402.1 N push at 0.5 MPa, while stepping up to a 50 mm bore yields 981.8 N push. Choose this 40 mm model when your setup requires precise forward positioning within the 25-45 mm window. A fixed-stroke ACQ is sufficient if no on-machine end-point adjustment is needed. Confirm your ordering details: 40 mm bore, 45 mm full stroke, 20 mm adjuster window, -S magnet, and 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 ACQJ40X45-20S FAQ
It delivers 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 25-45 mm, created by a 20 mm adjustment window on the 45 mm full stroke.
The external M12x1.25 threaded stop with lock nut mechanically limits how far the rod extends, shortening the forward stroke only. It does not alter piston area, so force remains identical to a standard ACQ. Fixed elastomer bumpers decelerate the load at both ends, and the -S magnet supports reed or electronic sensors.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
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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