Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X25SB
The AirTAC Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X25SB is a genuine single acting, push (spring return) ISO 21287 compact air cylinder with a Ø40mm bore and 25mm 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
- Stroke25 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 ASE40X25SB
This AirTAC ASE40X25SB is a single acting, spring-return compact cylinder that extends its rod with air and retracts it with a built-in spring, so it needs just one air line. At 0.5 MPa it delivers a net push of 556.8 N, and at 0.7 MPa that rises to 808.1 N, so it suits light clamping and positioning tasks.
Its ISO 21287 short body is about 50% shorter than an ISO 15552 profile cylinder, letting it fit inside tight machine guards and compact jigs. The optional -S magnet is fitted here, so CMSE or DMSE reed and solid-state switches can mount directly to sense the piston position. For a safe working load, plan on roughly 334 N of real work at 0.5 MPa, which is about 34 kg of vertical lift with a 2:1 margin.
Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X25SB Technical Specifications
| Model | Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X25SB |
|---|---|
| Series | ASE compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø40 mm |
| Stroke | 25 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 ASE40X25SB
| ASE | ISO 21287 compact cylinder (single-acting push, spring-return). |
|---|---|
| 40 | 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 ASE40X25SB Is Used
Jig Clamping
Use the ASE40X25SB to clamp small parts in a CNC fixture, where the 556.8 N push at 0.5 MPa holds components firmly during drilling or milling, and the spring retract clears the workspace quickly.
Label Applicator
In a packaging line, this cylinder extends to press labels onto cartons, with the 25 mm stroke covering the application distance and the spring return resetting for the next cycle at speeds up to 500 mm/s.
Guard Door Stop
Mount it on a machine guard to push a safety stop into place, where the compact body saves space and the 808.1 N at 0.7 MPa provides a firm hold, while the spring retracts the stop when air is removed.
Is the Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X25SB the Right Cylinder?
For a lighter push, the ASE32X25 offers 352.5 N at 0.5 MPa, while stepping up to the ASE50X25 gives 875.5 N at the same pressure. This 40 mm bore sits in the middle, ideal for applications that need more force than a 32 mm but less bulk than a 50 mm. Remember, the spring retracts the rod, so it does not hold a mid-stroke position; on air loss it returns home. The male rod thread (B) simplifies mounting with rod-end accessories, and the 1/8" port is standard for this bore.
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 ASE40X25SB FAQ
The ASE40X25SB delivers a net push of 556.8 N at 0.5 MPa and 808.1 N at 0.7 MPa, both already accounting for the return spring. It operates from 0.2 MPa minimum up to 1.0 MPa (28-145 psi), with a proof pressure of 1.5 MPa (215 psi). The 40 mm bore uses a 1/8" port and has a 12 mm rod.
The short body saves about 50% of the mounting length compared to an ISO 15552 profile cylinder, so it fits in tight spaces like inside guards or on compact gantries. It has a fixed TPU bumper at both ends to absorb impact, and the optional -S magnet (fitted here) allows CMSE or DMSE sensors to detect piston position.
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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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