Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20SB
The AirTAC Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20SB 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 ASQ40X20SB
The AirTAC ASQ40X20SB is a 40mm bore JIS compact cylinder engineered for single-acting push operation. Feeding compressed air into its single PT1/8 port extends the 16mm rod, while an internal mechanical spring handles retraction. This design cuts plumbing complexity to one solenoid line and guarantees fail-safe retraction to the rest position if air pressure drops. The unit carries the -S magnet for position sensing and the -B male M14x1.5 rod-end thread for direct load coupling.
At 0.5 MPa, this actuator delivers 628.3 N of theoretical push force, increasing to 879.6 N at 0.7 MPa. These are pre-spring figures; the return mechanism lowers the net usable output, so verify the exact net force from the official datasheet. Travel is capped at a short 20mm stroke (within the 30mm maximum for this bore). Deceleration relies on a fixed NBR elastomer bumper rather than adjustable air cushions, making it optimal for high-cycling ejection and holding tasks.
Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20SB Technical Specifications
| Model | Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20SB |
|---|---|
| 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 ASQ40X20SB
| 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 ASQ40X20SB Is Used
CNC Fixture Clamping
Pushes a short 20mm stroke to lock raw aluminum castings securely against machining locators during automated CNC milling.
Carton Flap Hold-down
Extends briefly to pin packaging flaps flat on a high-speed folder-gluer, relying on the spring to retract instantly before the next box passes.
Stamping Line Ejection
Shots out small metal stamped parts from a progressive die set, using the fixed NBR bumper to absorb the sudden end-of-stroke impact.
Is the Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20SB the Right Cylinder?
For sizing down within the 12-63mm range, the 32mm bore yields 402.1 N of theoretical push at 0.5 MPa, whereas the 50mm bore provides 981.8 N if you need to scale up. If your application requires travel beyond the 30mm maximum stroke limit for this single-acting series, transition to the double-acting ACQ equivalent. When finalizing this configuration, verify the 40mm bore, the 20mm stroke, the presence of the -S magnet for electronic or reed switches, and the -B male M14x1.5 rod 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 ASQ40X20SB FAQ
It provides 628.3 N theoretical push at 0.5 MPa and 879.6 N at 0.7 MPa. Because it is single-acting, the internal return spring lowers the net output, and a minimum operating pressure of 0.2 MPa is required to overcome the spring. The stroke is 20mm, well within the 30mm maximum for a 40mm bore.
The included -S magnet works with both reed and solid-state electronic switches via the integrated body grooves. Instead of an adjustable air cushion, end-of-travel deceleration uses a fixed NBR elastomer bumper, which is ideal for short-stroke ejection but may require external shock absorption for very heavy loads.
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