Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20S
The AirTAC Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20S is a genuine single-acting COMPACT (JIS) cylinder (single acting, push type) with a Ø40mm bore and 20mm stroke. Air pushes the rod and an internal spring performs the opposite stroke, so one solenoid line drives the motion — ideal for short-stroke clamping and ejection in tight spaces.
- BoreØ40 mm
- Stroke20 mm
- Port sizePT1/8
- Acting typeSingle acting, push type
- Rod threadM8×1.25 (F) / M14×1.5 (B)
- CushionBumper
About the Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20S
The AirTAC ASQ40X20S is a JIS compact single-acting push cylinder. Supplying air to its single PT1/8 port extends the Ø16 mm rod, while an internal spring handles retraction. This design simplifies plumbing by requiring just one solenoid line. It delivers 628.3 N of theoretical push force at 0.5 MPa (879.6 N at 0.7 MPa) before spring loss.
Because the return spring consumes energy, the net usable output is lower than these theoretical figures; verify the exact net force from the datasheet for your application. The body integrates fixed NBR elastomer bumpers rather than adjustable air cushions. A 20 mm stroke sits well within the 30 mm maximum travel limit for this bore size. If pneumatic pressure drops, the spring ensures a fail-safe return to the retracted rest position.
Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20S Technical Specifications
| Model | Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20S |
|---|---|
| Series | ASQ JIS compact single-acting cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 mm |
| Acting type | Single acting, push type |
| Port size | PT1/8 |
| Rod end thread | M8×1.25 female / M14×1.5 male (B) |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.2 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 500 mm/s |
| Cushion | Bumper |
| Max standard stroke | Up to 30 mm |
Specifications follow the official AirTAC ACQ-family datasheet. Single-acting types start at 0.2 MPa (the spring must be overcome). Confirm against the product label before installation.
Theoretical Output Force (Ø40mm, Push)
| Pressure | Push force (before spring) |
|---|---|
| 0.5 MPa | 628 N |
| 0.7 MPa | 880 N |
These are theoretical air-side forces; the return-spring force reduces the NET usable output. Single-acting push only — the spring performs the opposite stroke. Confirm the net figure from the datasheet and size with a safety margin.
Model Code: Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20S
| ASQ | JIS compact single acting, push type cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×20 | Stroke length in mm (single-acting max 30 mm). |
| S | Built-in magnet for magnetic-switch sensing (omit = none). |
| B | Male-thread piston rod (omit = female thread). |
Thread: PT standard (G / NPT available). ASQ pushes out / spring returns; ATQ pulls in / spring extends. Related: ACQ (double acting), ACQD (double rod), ACQJ (adjustable stroke).
Where the Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20S Is Used
CNC Fixture Clamping
Holds aluminum blocks firmly during milling operations using 0.7 MPa air pressure, then releases instantly via spring return when the line exhausts.
Packaging Line Diverter
Pushes cardboard cartons onto a secondary routing lane with a short 20 mm stroke, relying on the internal spring to reset the actuator between cycles.
Stamping Pin Locator
Extends a hardened alignment pin into sheet metal blanks before stamping, ensuring the bumper absorbs end-of-stroke impact without external shock absorbers.
Is the Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20S the Right Cylinder?
For sizing down, the Ø32 bore offers 402.1 N theoretical push at 0.5 MPa, while stepping up to the Ø50 bore yields 981.8 N. This 20 mm stroke is valid for the ASQ40 series, which allows up to 30 mm of travel. If your mechanism requires longer movement, switch to the double-acting ACQ equivalent. When ordering, confirm the 40 mm bore, 20 mm stroke, S magnet for sensing, and the default female M8x1.25 rod-end thread.
Quick checklist
- ✓ Net push force (after spring) at your pressure
- ✓ Stroke ≤ 30 mm (single-acting limit)
- ✓ Single air line saves a valve/port
- ✓ 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 0.2 – 1.0 MPa operating pressure.
- check Remember the spring performs the return stroke.
- check Avoid side load on the short piston rod.
- check Handle the C-clip carefully; seat it fully in its groove.
- check Installation by qualified personnel per AirTAC docs.
Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20S FAQ
It provides a theoretical push force of 628.3 N at 0.5 MPa and 879.6 N at 0.7 MPa before spring deduction. The return spring lowers net output, so check the datasheet for exact figures. Operating pressure must be at least 0.2 MPa to overcome the spring, and the maximum standard stroke for a 40 mm bore is 30 mm.
If air pressure is lost, the internal spring automatically retracts the rod to its fail-safe rest position. The S in the model number indicates a built-in piston magnet. This works with both reed and electronic solid-state switches mounted in the body grooves for position detection. End-of-travel deceleration is handled by fixed NBR elastomer bumpers, not adjustable cushions.
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