Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-40S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-40S 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 ACQJ40X90-40S
The ACQJ40X90-40S is a double-acting JIS compact cylinder with a 40mm bore and a 90mm full stroke. An external M12x1.25 threaded stop and lock nut lets you trim the extend end position on the machine, yielding a usable forward range of 50 to 90mm. The return stroke remains fixed at 90mm. Because the piston area stays constant, output force is identical to a standard ACQ of this size.
This unit includes the -S piston magnet for use with reed or solid-state sensors and features a fixed NBR elastomer bumper at each end. Operating pressure spans 0.15 to 1.0 MPa, and the PT1/8 porting mates with standard pneumatic fittings. The 16mm rod has a default female M8x1.25 end thread.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-40S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-40S |
|---|---|
| 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 ACQJ40X90-40S
| 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 ACQJ40X90-40S Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC mill without machining new spacers, shortening the rod extension by up to 40mm to clear varying part heights.
Packaging Size Changeovers
Adapt a carton sealing head on the fly for different box lengths by turning the external stop screw, avoiding mechanical teardown during production runs.
Assembly Press Trials
Set trial insertion depths on an automated assembly line, safely testing intermediate end positions between 50mm and 90mm before locking the nut.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-40S the Right Cylinder?
If your setup needs less thrust, the 32mm bore variant delivers 402.1N push at 0.5MPa, whereas stepping up to a 50mm bore provides 981.8N. Choose this 40mm bore when your fixture requires roughly 628.3N push and 527.8N pull at 0.5MPa. If the forward endpoint never varies, a fixed-stroke ACQ cylinder is sufficient. When ordering, confirm the 90mm full stroke, the 40mm adjustment window, the -S magnet, and your required 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 ACQJ40X90-40S FAQ
At 0.5 MPa it provides 628.3N push and 527.8N pull, and 879.6N push at 0.7 MPa. The maximum push is 128 kgf at 1.0 MPa. The 90mm full stroke can be shortened by up to 40mm, giving an adjustable forward range of 50 to 90mm.
No, turning the external M12x1.25 stop screw only limits travel length; it does not alter piston area, so thrust remains identical to a standard ACQ. Deceleration relies on fixed elastomer bumpers at both ends, so for high kinetic energy you should add an external shock absorber or slow the approach speed.
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Related AirTAC ACQJ Compact Cylinders
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