Airtac ASQ Series Single Acting Slim Cylinder ASQ40X25SB
The AirTAC Airtac ASQ Series Single Acting Slim Cylinder ASQ40X25SB 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 ASQ40X25SB
The AirTAC ASQ40X25SB is a single-acting push-type JIS compact cylinder. Supplying air to its single PT1/8 port extends the Ø16 mm rod, while an internal mechanical spring handles retraction. This configuration requires only one solenoid valve line, simplifying your pneumatics. 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. You must verify the net output from the datasheet, as the return spring lowers actual usable thrust.
Designed for short-stroke tasks, this 40 mm bore unit features a 25 mm travel within the 30 mm series maximum. The -B option provides a male M14x1.5 rod-end thread for direct load coupling. End-of-stroke deceleration relies on a fixed NBR elastomer bumper rather than an adjustable air cushion. Furthermore, the -S magnet enables position detection using either reed or solid-state electronic switches housed in the body grooves.
Airtac ASQ Series Single Acting Slim Cylinder ASQ40X25SB Technical Specifications
| Model | Airtac ASQ Series Single Acting Slim Cylinder ASQ40X25SB |
|---|---|
| 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 ASQ40X25SB
| 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 ASQ40X25SB Is Used
Press Die Ejection
Ejects stamped metal sheets from a press die using a short 25 mm stroke, relying on the spring to safely retract the pin during the next cycle.
Package Diverting
Pushes cardboard cartons off a packaging conveyor line, where the male M14x1.5 thread securely mounts a custom contact blade.
Component Hold-Down
Secures aluminum housings on an assembly fixture during machining, using the 628.3 N theoretical push to keep the part firmly located.
Is the Airtac ASQ Series Single Acting Slim Cylinder ASQ40X25SB the Right Cylinder?
When sizing this unit, consider the adjacent bores for your force requirements. Dropping to a 32 mm bore yields a 402.1 N theoretical push at 0.5 MPa, while stepping up to a 50 mm bore provides 981.8 N. If your application demands travel beyond 30 mm, transition to the double-acting ACQ series. To order correctly, confirm the 40 mm bore, 25 mm stroke, the -S magnet for sensing, and the -B male M14x1.5 thread. Operating pressure must be at least 0.2 MPa to overcome the return spring.
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 ASQ40X25SB FAQ
The theoretical push force is 628.3 N at 0.5 MPa and 879.6 N at 0.7 MPa. This figure represents the air-side force before the return spring is factored in, meaning net output is lower and should be confirmed via the datasheet. Operating pressure ranges from 0.2 MPa (minimum to overcome the spring) to 1.0 MPa, with a maximum standard stroke of 30 mm for this bore.
If air pressure is lost or exhausted, the internal spring automatically retracts the rod to its rest position, providing a fail-safe return. Deceleration at the stroke ends is handled by a fixed NBR elastomer bumper, not an adjustable air cushion. For high-energy cycles, consider adding an external shock absorber to slow the approach.
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