Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20
The AirTAC Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20 is a genuine single acting, push (spring return) ISO 21287 compact air cylinder with a Ø40mm bore and 20mm 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
- Stroke20 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 ASE40X20
This AirTAC ASE40X20 is a single acting push cylinder with spring return, meaning air extends the rod and the built-in spring retracts it, so it needs only one air line and returns to home on air loss. With a 40 mm bore, it 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 moderate clamping and light pressing jobs.
Its ISO 21287 compact body is about 50% shorter than an ISO 15552 profile cylinder, saving space in tight fixtures. The hard-anodized aluminium body and S45C hard-chrome rod resist wear, and the fixed TPU bumper at each end absorbs end-of-stroke impact. For a safe working load, plan for about 334 N (roughly 34 kg) of real work at 0.5 MPa, not the full rating, to keep a good safety margin.
Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20 Technical Specifications
| Model | Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20 |
|---|---|
| Series | ASE compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø40 mm |
| Stroke | 20 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 ASE40X20
| ASE | ISO 21287 compact cylinder (single-acting push, spring-return). |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 ASE40X20 Is Used
Jig clamping
Use this ASE40X20 to clamp small parts in a drill jig or assembly fixture. The 556.8 N push at 0.5 MPa holds components firmly during drilling, and the spring retract clears the workspace automatically.
Carton ejection
In a packaging line, this cylinder can push a finished carton off a conveyor onto a chute. The 20 mm stroke is enough to nudge the box, and the compact body fits under the conveyor guard.
Guard door stop
Mount this cylinder on a machine guard to push a stop pin into a slot, preventing the guard from closing until the cycle is done. The spring return retracts the pin when air is removed, and the TPU bumper prevents noise at the end of stroke.
Is the Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20 the Right Cylinder?
When sizing, compare this 40 mm bore with the 32 mm bore (352.5 N at 0.5 MPa) if you need less force, or the 50 mm bore (875.5 N at 0.5 MPa) for more power. This ASE40X20 has a 20 mm stroke, which is within the 25 mm max standard stroke for this bore, so it is a standard unit. Remember, the spring retracts the rod and does not hold a mid-stroke position, so use it for push-and-return tasks, not for holding a load in place. The port is 1/8" PT, and the rod end is female thread M8x1.25; if you need sensors, order the -S option for the magnet, which enables 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 ASE40X20 FAQ
The ASE40X20 delivers 556.8 N push at 0.5 MPa and 808.1 N at 0.7 MPa, both net of 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 port is 1/8" PT, and the rod is 12 mm with M8x1.25 female thread.
The ASE40X20 has a short body that saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits into tight jigs, guards, and gantries where a full-length cylinder won't. The fixed TPU bumper at both ends absorbs end-of-stroke impact, and the hard-anodized aluminium body is durable. If you need position sensing, order the -S option for the magnet to use CMSE or DMSE switches.
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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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