Airtac ASQ Series Single Acting Slim Cylinder ASQ40X25S
The AirTAC Airtac ASQ Series Single Acting Slim Cylinder ASQ40X25S is a genuine single-acting COMPACT (JIS) cylinder (single acting, push type) with a Ø40mm bore and 25mm 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
- Stroke25 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 ASQ40X25S
The AirTAC ASQ40X25S is a single-acting push-type JIS compact cylinder. Supplying air to the single PT1/8 port extends the Ø16 mm rod outward, while an internal mechanical spring retracts it upon exhaust. This one-air-line design simplifies plumbing and provides a fail-safe return to the rest position if air pressure drops. Stroke is 25 mm, well within the 30 mm maximum for this bore.
The Ø40 mm bore generates a theoretical push force of 628.3 N at 0.5 MPa and 879.6 N at 0.7 MPa. Because the internal return spring resists extension, the net usable output is lower; verify the exact net figure from the official datasheet. The body features fixed NBR elastomer bumpers for end-of-stroke impact absorption rather than adjustable air cushions. The -S suffix indicates a built-in piston magnet compatible with reed or solid-state electronic sensors.
Airtac ASQ Series Single Acting Slim Cylinder ASQ40X25S Technical Specifications
| Model | Airtac ASQ Series Single Acting Slim Cylinder ASQ40X25S |
|---|---|
| Series | ASQ JIS compact single-acting cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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 ASQ40X25S
| ASQ | JIS compact single acting, push type cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 ASQ40X25S Is Used
CNC Fixture Clamping
Holds aluminum blocks securely during milling operations, utilizing the spring-return feature to automatically release the part if the compressed air supply is interrupted.
Packaging Line Diverter
Pushes cardboard cartons onto a secondary packaging track, taking advantage of the compact 40 mm body and single port to fit within tight transfer conveyor framework.
Stamping Ejector Pin
Ejects small stamped metal brackets from a press die using the 628.3 N theoretical push, retracting quickly via the internal spring to clear the tooling for the next cycle.
Is the Airtac ASQ Series Single Acting Slim Cylinder ASQ40X25S the Right Cylinder?
For sizing, the adjacent Ø32 bore yields a 402.1 N theoretical push at 0.5 MPa, while the larger Ø50 bore provides 981.8 N. If your application requires travel beyond the 30 mm maximum stroke limit of this single-acting series, the double-acting ACQ compact cylinder is the correct alternative. When ordering, confirm the 40 mm bore, 25 mm stroke, -S magnet option, 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 ASQ40X25S FAQ
The theoretical push force is 628.3 N at 0.5 MPa and 879.6 N at 0.7 MPa. The return spring lowers the net usable output, so confirm the exact figure from the datasheet. A 0.2 MPa minimum operating pressure is required to overcome the spring. Maximum standard stroke for this 40 mm bore is 30 mm.
End-of-stroke impact is controlled by a fixed NBR elastomer bumper, not an adjustable air cushion. The -S suffix indicates a built-in piston magnet that allows position detection using either reed or electronic solid-state switches mounted in the body grooves.
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