Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE20X25S
The AirTAC Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE20X25S is a genuine single acting, push (spring return) ISO 21287 compact air cylinder with a Ø20mm bore and 25mm stroke, M5×0.8 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.
- BoreØ20 mm
- Stroke25 mm
- Port sizeM5×0.8
- Acting typeSingle acting, push (spring return)
- Rod threadM6×1.0
- 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 ASE20X25S
This AirTAC ASE20X25S is a single acting push cylinder with spring return, so air extends the rod and the built-in spring pulls it back. It delivers 127.4 N of push force at 0.5 MPa (net of the spring), which translates to a safe working load of about 8 kg when you apply a 0.6 derating factor. The ISO 21287 short body takes up roughly 50% less mounting length than an ISO 15552 profile cylinder, making it a strong fit for tight machine guards and compact jigs.
Because you ordered the -S option, this unit includes the magnet for CMSE or DMSE reed and solid-state switches, so you can confirm rod position without adding external hardware. The hard-anodized aluminium body and S45C hard-chrome plated rod resist wear in repetitive cycles, while the fixed TPU bumper at each end absorbs impact energy. This model uses an M5x0.8 port and a female M6x1.0 rod thread, and it runs on filtered air from 0.2 MPa up to 1.0 MPa (28-145 psi).
Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE20X25S Technical Specifications
| Model | Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE20X25S |
|---|---|
| Series | ASE compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 25 mm |
| Acting type | Single acting, push (spring return) |
| Port size | M5×0.8 |
| Rod thread | M6×1.0 |
| 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 (Ø20mm)
| Pressure | Push force (spring return) |
|---|---|
| 0.5 MPa | 127.4 N |
| 0.7 MPa | 190.2 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 ASE20X25S
| ASE | ISO 21287 compact cylinder (single-acting push, spring-return). |
|---|---|
| 20 | Bore size in mm. |
| ×25 | 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 ASE20X25S Is Used
Small Part Ejection
Use the 127.4 N push at 0.5 MPa to eject small plastic components from a mold or die in an injection molding machine, where the short stroke and compact body fit under the platen.
Gate Stop on a Conveyor
Actuate a light aluminum stop gate on a packaging conveyor line. The spring return retracts the gate automatically when air is removed, and the optional -S magnet lets a sensor confirm the gate position.
Jig Clamping in a Workstation
Clamp a thin sheet metal part against a fixture in a manual assembly station. The 25 mm stroke provides enough travel to secure the part, and the compact body leaves room for the operator's hands.
Is the Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE20X25S the Right Cylinder?
When sizing, compare this 20 mm bore unit with the smaller 16 mm bore that pushes 78.4 N at 0.5 MPa, or step up to the 25 mm bore for 210.1 N at the same pressure. The 127.4 N force here suits light clamping, small part ejection, or actuating a tiny gate, but remember the spring always returns the rod to its home position, so it will not hold a load at mid-stroke. If you need a powered return in both directions, look at the ACE double-acting version instead. The optional -S magnet is already fitted on this model, so you can mount CMSE or DMSE sensors directly on the body slots to track the piston position.
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 ASE20X25S FAQ
The ASE20X25S delivers 127.4 N push at 0.5 MPa and 190.2 N push at 0.7 MPa, and these values are already net of the return spring. The minimum working pressure is 0.2 MPa, the proof pressure is 1.5 MPa (215 psi), and the operating range is 0.2-1.0 MPa (28-145 psi).
The ISO 21287 short body saves about 50% of the mounting length compared to an ISO 15552 profile cylinder, so it fits into narrow machine guards and compact jigs. The fixed TPU bumper at both ends absorbs end-of-stroke impact, and the optional -S magnet on this model allows CMSE or DMSE sensors to detect the piston position.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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