Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20
The AirTAC Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20 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 ASQ40X20
The AirTAC ASQ40X20 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 brings it back to the start upon exhaust. This design simplifies plumbing by requiring just one solenoid line. The 40 mm bore yields a theoretical push force of 628.3 N at 0.5 MPa (or 879.6 N at 0.7 MPa) before the return spring's resistance is factored in; verify the exact net output from the datasheet for your specific load.
Built with a fixed NBR elastomer bumper rather than an adjustable air cushion, it handles end-of-stroke impact directly. The body retains integrated sensor grooves, though this specific configuration ships without the internal magnet. Because the internal spring occupies chamber length, the stroke is capped at 30 mm for this bore size. Should your application require longer travel, a double-acting ACQ series cylinder is the appropriate alternative. Operating pressure must be at least 0.2 MPa to overcome the return mechanism, with a speed range of 50-500 mm/s across a -20 to +70 C temperature range.
Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20 Technical Specifications
| Model | Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20 |
|---|---|
| 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 ASQ40X20
| 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 ASQ40X20 Is Used
Stamping Pin Locating
Pushes a locating pin into position to fixture sheet metal blanks on a mechanical stamping press, using the spring-return to safely withdraw the pin when air pressure drops.
Package Diverting Arm
Extends a short diverter flap on a packaging conveyor to push sorted cartons onto a secondary belt, relying on the compact 20 mm stroke for tight transfer points.
Injection Mold Ejection
Acts as a short-stroke knock-out pin for an injection molding machine, thrusting finished plastic parts free of the cavity before the mold fully opens.
Is the Airtac ASQ Series Single Acting Slim Cylinder ASQ40X20 the Right Cylinder?
For sizing, the 40 mm bore offers a theoretical push of 628.3 N at 0.5 MPa. If your load is lighter, stepping down to the 32 mm bore yields 402.1 N, while moving up to the 50 mm bore provides 981.8 N of theoretical extension force. This 20 mm stroke falls well within the 30 mm maximum limit for this single-acting series; for longer travel, select the double-acting ACQ equivalent. When ordering, confirm the 40 mm bore, 20 mm stroke, the default female M8x1.25 rod-end thread, and note that this unit lacks the -S magnet option required for position sensing.
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 ASQ40X20 FAQ
It delivers a theoretical push force of 628.3 N at 0.5 MPa and 879.6 N at 0.7 MPa before the return spring is considered; the spring lowers the net output so confirm exact figures from the datasheet. Operating pressure ranges from 0.2 MPa (minimum to overcome the spring) to 1.0 MPa, and the maximum stroke for this bore is 30 mm.
As a single-acting push cylinder, exhausting the air port allows the internal spring to retract the rod to its rest position, providing a fail-safe return if air pressure is lost. End-of-stroke impact is managed by a fixed NBR elastomer bumper, not an adjustable air cushion, so external shock absorbers may be needed for high-energy approaches.
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