Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20SFA
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20SFA is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 30mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke30 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20SFA
The ACQJ40X30-20SFA is a double-acting JIS compact cylinder with a 40 mm bore and an external threaded stop that limits the extend stroke. You can fine-tune the usable extend range from 10 mm up to the full 30 mm directly on your equipment, while the retract distance remains completely unaffected. It includes a built-in piston magnet for position sensing and an FA mounting bracket interface.
Because the adjuster only restricts travel length, the piston area stays the same, meaning force is identical to a standard ACQ. You get 628.3 N push and 527.8 N pull at 0.5 MPa. The body uses fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration rather than adjustable air cushions.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20SFA Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20SFA |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 30 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 ACQJ40X30-20SFA
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×30 | 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 ACQJ40X30-20SFA Is Used
Product Changeover Stops
Adjust the extend stop by up to 20 mm during packaging line changeovers to hit new product widths without swapping cylinders.
Trial End Positions
Dial in the exact 10 to 30 mm clamping extension on assembly fixtures during prototype runs to prevent over-travel damage.
Setup-Varying Fixtures
Fine-tune the extend endpoint on machining jigs to accommodate varying part tolerances directly on the factory floor.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20SFA the Right Cylinder?
This 40 mm bore provides 628.3 N push at 0.5 MPa. Stepping down to a 32 mm bore yields 402.1 N, whereas moving up to a 50 mm bore provides 981.8 N. Choose this specific unit when your setup requires exact extend end-position tuning within a 10-30 mm window. If your application does not need on-the-fly stroke shortening, a fixed-stroke ACQ cylinder is sufficient. Confirm your ordering essentials: 40 mm bore, 30 mm full stroke, 20 mm adjuster window, S magnet, female M8x1.25 rod end, and FA mount.
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 ACQJ40X30-20SFA FAQ
The usable extend range is 10-30 mm (a 20 mm window off the 30 mm full stroke). Force is identical to a standard ACQ: 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 stroke only; retract is unaffected, and force is unchanged. The cylinder uses fixed NBR bumpers, not an air cushion. Note that a plain ACQ-type does not hold its load on air loss, so use an external rod lock for fail-safe holding.
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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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