Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X25B
The AirTAC Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X25B 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 ASE40X25B
This AirTAC ASE40X25B 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. At 0.5 MPa it delivers 556.8 N of push force net of the spring, and at 0.7 MPa that rises to 808.1 N, so it suits light clamping and positioning tasks in compact spaces.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which helps when space is tight inside a guard or gantry. The male rod thread (B code) simplifies mounting to a fixture, and the fixed TPU bumper at both ends absorbs end-of-stroke impact. For a safe working load, plan for about 334 N of real work at 0.5 MPa, which is roughly 34 kg of vertical lift with a 2:1 safety margin.
Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X25B Technical Specifications
| Model | Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X25B |
|---|---|
| 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 ASE40X25B
| 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 ASE40X25B Is Used
Jig Clamping
Use the 556.8 N push at 0.5 MPa to clamp small workpieces in a drill jig, where the spring return clears the part automatically when air is released.
Label Applicator
Drive a label tamp head in a packaging line with this 25 mm stroke, extending to press labels onto boxes and retracting quickly via the spring.
Guard Door Interlock
Mount on a machine guard to push a locking pin into place with 808.1 N at 0.7 MPa, retracting when the guard is opened, thanks to the spring return.
Is the Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X25B the Right Cylinder?
For a lighter duty, 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, giving a good balance of force and compact size for short-stroke applications up to 25 mm. Since it is single acting, the spring returns the rod to the retracted position on air loss, but it does not hold a mid-stroke position. This model has no magnet, so if you need position sensing, order the -S version with the optional magnet for CMSE or DMSE switches.
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 ASE40X25B FAQ
At 0.5 MPa, the push force is 556.8 N net of the return spring. At 0.7 MPa, it is 808.1 N. The minimum working pressure is 0.2 MPa, and the maximum is 1.0 MPa (145 psi). The proof pressure is 1.5 MPa (215 psi).
It follows the ISO 21287 compact standard, so the body is about 50% shorter than an ISO 15552 profile cylinder, fitting into tight spaces. The fixed TPU bumper at both ends absorbs impact. This model has no magnet, so sensors are not possible unless you order the -S version with the optional magnet for CMSE or DMSE switches.
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