Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20S
The AirTAC Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20S is a genuine single acting, push (spring return) ISO 21287 compact air cylinder with a Ø40mm bore and 20mm stroke, 1/8" air ports and a hard-anodized aluminium body. Its short compact envelope saves about 50% of the mounting length of an ISO 15552 profile cylinder.
- BoreØ40 mm
- Stroke20 mm
- Port size1/8"
- Acting typeSingle acting, push (spring return)
- Rod threadM8×1.25
- CushionFixed TPU bumper (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20S
The ASE40X20S is a single acting push cylinder with spring return, delivering 556.8 N of net push force at 0.5 MPa and 808.1 N at 0.7 MPa. Its ISO 21287 short body takes up about half the mounting length of an ISO 15552 profile cylinder, making it ideal for tight machine frames and guard enclosures.
This model comes with the optional -S magnet fitted, so CMSE or DMSE reed and solid-state switches can be added for position sensing. The hard-anodized aluminium body and S45C hard-chrome rod resist wear, while the fixed TPU bumper absorbs end-of-stroke impact. For a safe vertical lift, plan on roughly 34 kg at 0.5 MPa, applying a 2:1 margin over the rated force.
Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20S Technical Specifications
| Model | Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20S |
|---|---|
| Series | ASE compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø40 mm |
| Stroke | 20 mm |
| Acting type | Single acting, push (spring return) |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 | Fixed TPU bumper (both ends) |
| Max standard stroke | Up to 25 mm |
Specifications follow the official AirTAC ACE-series (ISO 21287) datasheet. Body: hard-anodized aluminium alloy; piston rod: S45C carbon steel with hard-chrome plating. Rod type: female thread (blank) or male thread (B). Thread options: PT (blank) / G. A built-in magnet is OPTIONAL — add the -S code to fit CMSE / DMSE position sensors.
Theoretical Output Force (Ø40mm)
| Pressure | Push force (spring return) |
|---|---|
| 0.5 MPa | 556.8 N |
| 0.7 MPa | 808.1 N |
Single-acting push: air extends the rod; the return spring retracts it. Forces already net the spring; minimum working pressure is 0.2 MPa. Single-acting strokes are short (Ø12 to 10 mm, Ø16-100 to 25 mm).
Model Code: Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20S
| ASE | ISO 21287 compact cylinder (single-acting push, spring-return). |
|---|---|
| 40 | Bore size in mm. |
| ×20 | Stroke length in mm. |
| S | Optional built-in magnet for CMSE / DMSE sensors (omit for no magnet). |
| B | Rod type: B = male thread; blank = female thread. |
ACE-family variants: ACE (double acting), ASE / ATE (single acting push / pull), ACED (double rod), ACEJ (adjustable stroke), TACE / TACED (non-rotating twin-guide yoke). Mounting accessories: FA / FB flange, LB foot, CA / CB clevis, CR, SDB pivot, FTC; plus I and Y knuckles. Thread PT (blank) / G.
Where the Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20S Is Used
Fixture Clamping
Use the ASE40X20S to clamp small parts in a CNC milling fixture, where its 556.8 N push at 0.5 MPa holds components securely and the compact body fits under the spindle guard.
Carton Ejection
In a packaging line, this cylinder can push finished cartons off a conveyor onto a chute, with the spring return resetting the rod for the next cycle at speeds up to 500 mm/s.
Gate Stop
Mount the ASE40X20S on a machine guard gate to extend a stop pin that positions pallets, relying on the 808.1 N at 0.7 MPa to hold the pin against the pallet edge.
Is the Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20S the Right Cylinder?
When sizing, compare the ASE40X20S with the smaller ASE32X25, which offers 352.5 N at 0.5 MPa, or the larger ASE50X25 with 875.5 N at 0.5 MPa. The spring returns the rod to its retracted position on air loss, so it does not hold a mid-stroke load. Choose FA/FB flange, LB foot, CA/CB clevis, CR, SDB pivot, or FTC brackets to match your fixture, and order the -S magnet for sensor feedback.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Short stroke fits the compact body
- ✓ Port/thread type (PT / G)
- ✓ Add -S if you need the magnet for sensors
- ✓ Rod type (female / male B) & mount (FA/LB/CA)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.2 – 1.0 MPa operating pressure.
- check Compact body: keep the stroke short and avoid side load on the rod.
- check Do not dismantle the threaded front/back covers.
- check Single-acting: do not force the rod against the spring.
- check Installation by qualified personnel per AirTAC docs.
Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20S FAQ
At 0.5 MPa, the push force is 556.8 N, and at 0.7 MPa it is 808.1 N, both net of the return spring. The minimum working pressure is 0.2 MPa, and the proof pressure is 1.5 MPa (215 psi).
The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits in compact jigs and guards. The fixed TPU bumper absorbs end-of-stroke energy, and the optional -S magnet allows CMSE or DMSE switches for position sensing.
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