
The AirTAC Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE25X25B is a genuine single acting, push (spring return) ISO 21287 compact air cylinder with a Ø25mm 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.
This is a single acting push cylinder: air extends the rod and an internal return spring retracts it, so only one air line is needed. The 25 mm bore delivers 210.1 N of push at 0.5 MPa (net of the spring) and 308.3 N at 0.7 MPa, with working pressure from 0.2 MPa (28-145 psi range) and speed of 50-500 mm/s. The male rod thread (B code) bolts straight to your linkage.
The ISO 21287 compact body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guarded stations. A fixed TPU bumper absorbs end-of-stroke shock at both ends. For sizing, plan on roughly 126 N of usable work at 0.5 MPa, which lifts about 10 kg vertically with a 2:1 margin. Note there is no magnet fitted; order the -S code if you want CMSE / DMSE switch sensing.
| Model | Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE25X25B |
|---|---|
| Series | ASE compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø25 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.
| Pressure | Push force (spring return) |
|---|---|
| 0.5 MPa | 210.1 N |
| 0.7 MPa | 308.3 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).
| ASE | ISO 21287 compact cylinder (single-acting push, spring-return). |
|---|---|
| 25 | 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.
Springs a clamp arm onto a machined aluminium bracket; 210.1 N at 0.5 MPa holds light parts while the spring clears the workpiece on air-off.
Nudges a small carton off a conveyor lane at a packing station; the 25 mm stroke matches the lane width and one solenoid valve runs it.
Ejects filled vials from a lab filling nest; the spring-return design drops the rod clear when air is cut, protecting the next cycle.
At 210.1 N push (0.5 MPa) this bore sits between the 20 mm (127.4 N) and 32 mm (352.5 N) single-acting sizes - step down for lighter clamps, up for heavier presses. The spring returns the rod home on air loss but will not hold a mid-stroke position. Choose FA/FB flange, LB foot, CA/CB clevis, CR, SDB or FTC mounting to suit the fixture, and add -S to the code if position sensing is needed.
Quick checklist
Push force is 210.1 N at 0.5 MPa and 308.3 N at 0.7 MPa, both already net of the return spring. Operating pressure is 0.2-1.0 MPa (28-145 psi), proof pressure 1.5 MPa (215 psi), air filtered to 40 um, speed 50-500 mm/s, temperature -20 to +70 C. Air extends the rod; the spring retracts it.
The ISO 21287 compact body cuts mounting length by about 50% versus an ISO 15552 profile cylinder, with a hard-anodized aluminium body, S45C hard-chrome rod and fixed TPU bumpers at both ends. Sensing is not fitted as standard: order the -S magnet option to enable CMSE / DMSE switches. Mounting options include FA/FB flange, LB foot, CA/CB clevis, CR, SDB and FTC.
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