Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE20X25B
The AirTAC Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE20X25B 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 ASE20X25B
This AirTAC ASE20X25B is a single acting push cylinder with spring return, so air extends the rod and the internal spring pulls it back when pressure drops. With a 20 mm bore, it delivers 127.4 N of push force at 0.5 MPa, net of the return spring, and 190.2 N at 0.7 MPa.
Its ISO 21287 compact body is about 50% shorter than an ISO 15552 profile cylinder, letting it fit into tight jigs and guards. The male rod thread (B code) simplifies mounting, and the hard-anodized aluminium body with a hard-chrome S45C rod resists wear. For a safe working load, plan for about 76 N (roughly 7.8 kg) of real work at 0.5 MPa, not the full rating, to leave a margin for friction and side loads.
Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE20X25B Technical Specifications
| Model | Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE20X25B |
|---|---|
| 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 ASE20X25B
| 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 ASE20X25B Is Used
Jig Clamping
Use the ASE20X25B to clamp small parts in a drill jig. Its 127.4 N push at 0.5 MPa holds a workpiece firmly, and the spring retracts the rod for quick part changes.
Label Applicator
In a packaging line, this cylinder extends to press a label onto a box, then springs back. The compact body fits between conveyor rails, and the 25 mm stroke matches the label height.
Guard Door Latch
Mount the ASE20X25B to release a safety guard latch on a small machine. The spring return ensures the latch re-engages when air is off, and the male rod thread connects to a simple linkage.
Is the Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE20X25B the Right Cylinder?
When sizing, compare this 20 mm bore with the 25 mm bore, which offers 210.1 N at 0.5 MPa, if you need more force. The 16 mm bore provides 78.4 N at 0.5 MPa for lighter tasks. Since this is single acting, the spring returns the rod to its retracted position on air loss; it does not hold a mid-stroke position. The M5x0.8 port suits small-bore air lines, and the male rod thread allows direct coupling to linkages without a female adapter.
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 ASE20X25B FAQ
At 0.5 MPa, the push force is 127.4 N, and at 0.7 MPa it is 190.2 N. These values are net of the return spring, so they are the actual force available to move a load. The minimum working pressure is 0.2 MPa, and the proof pressure is 1.5 MPa (215 psi).
No, this model code (ASE20X25B) does not include the optional -S magnet, so no CMSE or DMSE switch can be mounted. If you need position sensing, order the -S version (e.g., ASE20X25SB). The fixed TPU bumper at both ends absorbs end-of-stroke impact but does not adjust or lock.
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