Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-50SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-50SB 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 ACQJ40X90-50SB
The AirTAC ACQJ40X90-50SB is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that restricts the extend end position. You get a usable extend range of 40-90 mm, achieved by shortening the 90 mm full stroke by up to a 50 mm window. The retract stroke remains completely unaffected. Because the piston area stays constant, output force equals a standard ACQ, delivering 628.3 N push at 0.5 MPa.
This 40 mm bore unit uses a 16 mm rod and a PT1/8 port. It includes a male M14x1.5 rod-end thread for direct load coupling and an M12x1.25 external adjuster thread. The body relies on fixed NBR elastomer bumpers at each end rather than adjustable pneumatic cushions. Equipped with a piston magnet, the sensor grooves accept both reed and solid-state electronic switches for precise position detection.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-50SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-50SB |
|---|---|
| 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 ACQJ40X90-50SB
| 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 ACQJ40X90-50SB Is Used
Machining Fixture Clamps
Dial in the exact clamping reach on a CNC fixture during part changeovers without machining new spacer blocks.
Carton Sealing Stops
Adjust the folding arm extension on packaging lines to accommodate varying box heights on the fly.
Bending Press Stops
Set precise metal forming depths on a press brake by tweaking the extend limit rather than swapping tooling.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-50SB the Right Cylinder?
If your application requires less push force, the adjacent 32 mm bore yields 402.1 N at 0.5 MPa, whereas stepping up to the 50 mm bore provides 981.8 N. A fixed-stroke ACQ is sufficient if your end position never varies. For this model, verify your ordering essentials: 40 mm bore, 90 mm full stroke, 50 mm adjuster 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 ACQJ40X90-50SB FAQ
The usable extend range is 40-90 mm. Force is identical to a standard ACQ of this bore: 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.
An external M12x1.25 threaded stop with a lock nut limits the extend length without changing the piston area, so force is unchanged. The retract stroke is unaffected. Fixed NBR bumpers decelerate the load near stroke end. A plain ACQ does not hold loads on air loss, so add an external rod lock for fail-safe holding.
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Related AirTAC ACQJ Compact Cylinders
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