Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-20
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-20 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 90mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke90 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-20
The AirTAC ACQJ40X90-20 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 forward stroke on the machine across a 70-90mm usable range (90mm full stroke minus the 20mm window) 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 628.3N push and 527.8N pull at 0.5 MPa. The 16mm rod uses a female M8x1.25 end thread, and the body incorporates sensor grooves for reed or solid-state switches. Deceleration relies on a fixed NBR elastomer bumper at each end rather than an adjustable air cushion.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-20 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-20 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 90 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 ACQJ40X90-20
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×90 | 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 ACQJ40X90-20 Is Used
Machine Ttrial Stops
Dial in the exact clamping end position during CNC machining setup by adjusting the external M12x1.25 stop screw, avoiding the need to machine custom spacers.
Product Changeover
Quickly alter the extend reach on packaging equipment when switching to a different carton size, shifting the forward stroke within the 70-90mm window to meet new format requirements.
Variable Assembly Fixtures
Accommodate multiple part lengths on a single automated assembly station by turning the lock nut to shorten the cylinder extension precisely for each specific workpiece.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-20 the Right Cylinder?
If your application only requires a fixed 90mm forward movement, a standard ACQ series cylinder will suffice without needing the external adjuster hardware. When sizing for force, stepping down to a 32mm bore yields 402.1N push at 0.5 MPa, whereas stepping up to a 50mm bore provides 981.8N. This 40mm bore achieves a maximum push of 128 kgf at 1.0 MPa. To order, confirm the 40mm bore, 90mm full stroke, 20mm adjustment window, female rod thread, and whether you require the -S magnet option for position 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 ACQJ40X90-20 FAQ
This 40mm bore cylinder provides 628.3N push and 527.8N pull at 0.5 MPa, 879.6N push at 0.7 MPa, and a maximum push of 128 kgf at 1.0 MPa. The usable extend range is 70-90mm, created by the 20mm adjustment window on the 90mm full stroke.
The external M12x1.25 threaded stop with lock nut mechanically limits how far the rod extends, shortening the forward stroke without changing the piston area or force output. Deceleration is handled by fixed elastomer bumpers rather than adjustable air cushions. While this specific model lacks a magnet, the body retains sensor grooves for adding reed or solid-state switches if needed.
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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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