Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20B
The AirTAC Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20B 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 ASQ40X20B
The AirTAC ASQ40X20B is a JIS compact single-acting push cylinder. Supplying air to its single PT1/8 port extends the Ø16mm rod, while an internal spring handles retraction. This model yields a theoretical push force of 628.3N at 0.5 MPa and 879.6N at 0.7 MPa before spring loss. You must verify the net output from the datasheet, as the return spring consumes a portion of this energy.
Featuring a 20mm stroke within the 30mm limit for this bore, the unit uses a fixed NBR elastomer bumper for end-of-travel damping rather than an adjustable air cushion. The -B option provides a male M14x1.5 rod-end thread for direct load coupling. Although this specific configuration ships without a magnet, the body retains magnetic-switch grooves for future sensing upgrades.
Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20B Technical Specifications
| Model | Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20B |
|---|---|
| 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 ASQ40X20B
| 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 ASQ40X20B Is Used
Stamping Pin Locator
Pushes a locating pin into a fixture plate to hold sheet metal during a stamping press cycle.
Packaging Lane Divert
Extends a guide flap to sort cartons into a secondary packaging lane on a filling line.
Injection Mold Ejector
Provides a short push to eject small plastic parts from an injection molding cavity.
Is the Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20B the Right Cylinder?
For a 40mm bore, this 20mm stroke is well within the 30mm maximum. If your project requires longer travel, you must switch to the double-acting ACQ series. If you need less force, the Ø32 bore offers 402.1N theoretical push at 0.5 MPa; for heavier drives, the Ø50 bore provides 981.8N. When ordering, confirm the 40mm bore, 20mm stroke, the -B male M14x1.5 rod thread, and note this version lacks the -S magnet.
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 ASQ40X20B FAQ
It delivers a theoretical push of 628.3N at 0.5 MPa and 879.6N at 0.7 MPa before spring deduction; verify net force from the datasheet. The stroke is 20mm, and the maximum standard stroke for a 40mm bore is 30mm. Operating pressure is 0.2-1.0 MPa, requiring a 0.2 MPa minimum to overcome the spring.
It uses a fixed NBR elastomer bumper at the end of travel, which is not adjustable. If air pressure drops or is lost, the internal spring automatically retracts the rod to its rest position, providing a fail-safe return. The body includes sensor grooves, but this non-S variant ships without a magnet.
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