Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X25SG
The AirTAC Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X25SG 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 ASE40X25SG
This is a single acting push cylinder with spring return, so air extends the rod and the built-in spring pulls it back when pressure drops. The 40 mm bore delivers 556.8 N of push force at 0.5 MPa, net of the spring, and 808.1 N at 0.7 MPa, so it suits light to medium automation tasks.
Its ISO 21287 compact body is about 50% shorter than an ISO 15552 profile cylinder, which lets you fit it into tight jigs and guards. The optional -S magnet is already fitted here, so you can mount CMSE or DMSE reed or solid-state switches for position sensing. For a safe working load, plan on about 334 N of real work at 0.5 MPa, which is roughly 34 kg of vertical lift with a 2:1 margin.
Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X25SG Technical Specifications
| Model | Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X25SG |
|---|---|
| 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 ASE40X25SG
| 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 ASE40X25SG Is Used
Jig Clamping on a CNC Fixture
Use the 556.8 N push at 0.5 MPa to clamp a small workpiece in a CNC milling fixture, with the spring retracting the clamp when the cycle ends. The compact body fits between the spindle and the guard.
Carton Ejector on a Packing Line
Mount this cylinder to push a finished carton off a conveyor onto a takeaway belt. The 25 mm stroke is enough to clear the edge, and the spring returns the pusher for the next cycle.
Parts Stop on an Assembly Bench
Position the cylinder to extend a stop pin that halts a sliding component at a manual assembly station. The 808.1 N at 0.7 MPa gives a firm stop, and the spring withdraws the pin when the operator releases the valve.
Is the Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X25SG the Right Cylinder?
Choose this 40 mm bore when you need a compact single acting cylinder that pushes with 556.8 N at 0.5 MPa. If you need less force, the 32 mm bore gives 352.5 N at 0.5 MPa, while the 50 mm bore steps up to 875.5 N. The spring returns the rod to the retracted position on air loss, so it cannot hold a mid-stroke load. Mounting options include FA/FB flange, LB foot, CA/CB clevis, CR, SDB pivot, and FTC brackets, plus I and Y rod knuckles. The -S magnet is fitted, so you can add CMSE or DMSE switches for end-of-stroke signals.
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 ASE40X25SG FAQ
The push force is 556.8 N at 0.5 MPa and 808.1 N at 0.7 MPa, both net of the return spring. The minimum working pressure is 0.2 MPa, and the proof pressure is 1.5 MPa (215 psi). Operating pressure range is 0.2-1.0 MPa (28-145 psi).
The ISO 21287 body is about 50% shorter than an ISO 15552 profile cylinder, so it fits into compact machine frames and under guards. The fixed TPU bumper at both ends absorbs end-of-stroke impact, and the optional -S magnet allows CMSE or DMSE sensors to detect the rod position.
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