Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20B
The AirTAC Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20B 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 ASE40X20B
This ASE40X20B is a single acting push cylinder with a spring return, so air extends the rod and the spring brings it back. It delivers 556.8 N of push force at 0.5 MPa, already net of the spring, and needs a minimum of 0.2 MPa to overcome the spring's resistance.
Its ISO 21287 compact body is about 50% shorter than an ISO 15552 profile cylinder, making it ideal for tight spaces. The male rod thread (B code) simplifies mounting, and the fixed TPU bumper at both ends absorbs end-of-stroke energy. For a safe working load, plan for about 334 N of real work at 0.5 MPa, which is roughly equivalent to lifting 34 kg vertically with a 2:1 safety margin.
Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20B Technical Specifications
| Model | Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20B |
|---|---|
| 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 ASE40X20B
| 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 ASE40X20B Is Used
Jig Clamping
Use the 556.8 N push to clamp small parts in a drilling jig. The compact body fits under a worktable, and the spring retracts the clamp automatically when air is released.
Label Applicator
Drive a label applicator head in a packaging line. The 20 mm stroke is enough to press labels onto boxes, and the spring return resets the head for the next cycle.
Guard Door Lock
Actuate a safety guard lock on a small machine. The push force holds the guard closed during operation, and the spring releases it when air is cut, allowing access.
Is the Airtac ASE Single Acting Plunger Type Compact Air Cylinder ASE40X20B the Right Cylinder?
When sizing, compare this 40 mm bore with a smaller 32 mm bore that offers 352.5 N at 0.5 MPa, or a larger 50 mm bore providing 875.5 N. The spring return means it does not hold a mid-stroke position on air loss; it returns to the retracted position. This model has no magnet, so CMSE or DMSE sensors cannot be used unless you order the optional -S version. The 1/8" port and male rod thread suit standard fixtures.
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 ASE40X20B 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).
No, this version has no magnet, so CMSE or DMSE switches cannot be mounted. You would need to order the ASE40X20B-S model, which includes the optional magnet for sensor use.
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Standard models are processed and dispatched in 3-5 business days.
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