Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20B 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 ACQJ40X30-20B
The AirTAC ACQJ40X30-20B is a double-acting JIS compact cylinder featuring a male-thread piston rod (M14x1.5) that couples directly to your load. An external threaded stop with a lock nut limits the extend end position, allowing you to fine-tune the usable extend range from 10 mm up to the full 30 mm directly on the machine. The retract stroke remains completely unaffected.
Because the adjuster changes only the stroke length and not the piston area, the output force remains identical to a standard ACQ of the same 40 mm bore. The unit pushes with 628.3 N and pulls with 527.8 N at 0.5 MPa. It features a fixed NBR elastomer bumper at each end for end-of-stroke deceleration and includes sensor grooves, though this specific configuration ships without a magnet.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20B |
|---|---|
| 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 ACQJ40X30-20B
| 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 ACQJ40X30-20B Is Used
Machining Fixture Stops
Dial in the exact 10 to 30 mm extend position during setup on a CNC machining fixture without machining new spacer blocks.
Product Changeover Lines
Rapidly adapt end-stop distances on a conveyor sorting station when switching between different product lengths.
Packaging Machine Trials
Test different pressing depths on a carton sealing head by tweaking the external stop nut until the optimal crush distance is found.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X30-20B the Right Cylinder?
For sizing, stepping down to a 32 mm bore yields 402.1 N push at 0.5 MPa, while stepping up to a 50 mm bore provides 981.8 N. If your application requires a fixed extend position and never needs on-the-fly adjustments, a standard ACQ cylinder will suffice. When ordering this adjustable version, confirm the 40 mm bore, 30 mm full stroke, 20 mm adjuster window, the male rod thread, and note that the -S magnet is omitted here.
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 ACQJ40X30-20B FAQ
It delivers 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. The usable extend range is 10 to 30 mm, governed by the 20 mm adjustment window. Force is identical to a standard ACQ because the adjuster only changes stroke length.
An external M12x1.25 threaded stop with a lock nut mechanically limits the extend stroke, while fixed elastomer bumpers decelerate the piston near stroke ends. A plain cylinder does not hold its load on air loss or when a valve is centered; for a fail-safe hold, you must install an external rod lock or pilot-operated check valve.
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Genuine AirTAC parts produced by AirTAC factory.
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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