Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20SB
The AirTAC Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20SB 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 ASE40X20SB
This ASE40X20SB is a single acting push cylinder with spring return, so air extends the rod and the return spring retracts it, needing only one air line. It delivers 556.8 N of push at 0.5 MPa, net of the spring, and 808.1 N at 0.7 MPa, with a minimum working pressure of 0.2 MPa to overcome the spring.
The ISO 21287 compact body is about 50% shorter than an ISO 15552 profile cylinder, fitting into tight jigs and guards. The optional -S magnet is fitted here, enabling CMSE or DMSE switches for position sensing. For a safe working load, plan for about 334 N (0.6 times the 0.5 MPa rating), which lifts about 34 kg vertically with a 2:1 margin.
Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20SB Technical Specifications
| Model | Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20SB |
|---|---|
| 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 ASE40X20SB
| 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 ASE40X20SB Is Used
Jig Clamping
In a CNC machining fixture, this 40 mm bore cylinder with 556.8 N push at 0.5 MPa clamps small parts securely, and the compact body fits under the workholding table.
Label Applicator
On a packaging line, the 20 mm stroke extends to press labels onto cartons, and the spring return retracts quickly for the next cycle, running at speeds from 50 to 500 mm/s.
Guard Door Latch
For a machine safety guard, this cylinder pushes a latch into place to keep the door closed, and the spring retracts it when air is released, fitting within the slim frame.
Is the Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20SB the Right Cylinder?
For lighter duty, the ASE32X25 offers 352.5 N at 0.5 MPa, while the ASE50X25 provides 875.5 N, so choose based on your force needs. This 40 mm bore with a 20 mm stroke suits short-travel applications; remember the spring retracts the rod and does not hold a mid-stroke position. The male rod thread (B) and PT port thread simplify mounting, and the optional -S magnet allows sensor feedback.
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 ASE40X20SB FAQ
The ASE40X20SB delivers 556.8 N of push 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).
The ISO 21287 body is about 50% shorter than an ISO 15552 profile cylinder, so it fits in compact jigs and guards. The fixed TPU bumper at both ends absorbs end-of-stroke energy, and the optional -S magnet allows CMSE or DMSE sensors for position feedback.
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Standard models are processed and dispatched in 3-5 business days.
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