Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X40-20SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X40-20SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 40mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke40 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X40-20SB
The AirTAC ACQJ40X40-20SB 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 usable extend stroke anywhere from 20 mm up to the full 40 mm directly on the machine, while the retract stroke remains completely unaffected. Because the piston area stays constant, the output force equals that of a standard ACQ bore 40 cylinder.
This model delivers 628.3 N push and 527.8 N pull force at 0.5 MPa, operating on PT1/8 ports. It includes a male M14x1.5 rod-end thread for direct load coupling and an M12x1.25 external adjuster thread. The unit relies on a fixed NBR elastomer bumper at each end for deceleration and features a built-in piston magnet (-S) compatible with reed or solid-state electronic switches.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X40-20SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X40-20SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 40 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 ACQJ40X40-20SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 ACQJ40X40-20SB Is Used
Machining Fixture Stops
Dial in the exact extend position from 20 to 40 mm on a CNC machining fixture to accommodate varying part thicknesses without swapping out cylinder hardware.
Product Changeover Diverter
Adjust the extend stroke on a packaging line diverter gate during rapid product changeovers, ensuring items are routed accurately without mechanical rebuilds.
Assembly Press Trial
Test different end-of-stroke pressing depths on an electronics assembly press by turning the external stop, finding the optimal insertion distance before locking the nut.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X40-20SB the Right Cylinder?
If you need slightly less thrust, the adjacent bore 32 yields 402.1 N push at 0.5 MPa, whereas stepping up to bore 50 provides 981.8 N. A fixed-stroke ACQ40 is sufficient if your end position never varies. For this adjustable model, confirm your ordering essentials: 40 mm bore, 40 mm full stroke, 20 mm adjuster window, -S magnet, and -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 ACQJ40X40-20SB FAQ
At 0.5 MPa it provides 628.3 N push and 527.8 N pull, and 879.6 N push at 0.7 MPa. The maximum push force is 128 kgf at 1.0 MPa. The usable extend range is 20-40 mm, meaning the 40 mm full stroke can be shortened by up to the 20 mm window.
No, the adjuster changes the stroke length only, so force remains identical to a standard ACQ. The cylinder uses a fixed NBR elastomer bumper at each end for deceleration rather than an adjustable air cushion. For high-energy impacts, use an external shock absorber or slow the approach speed.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC ACQJ Compact Cylinders
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