Airtac SSA Single-Acting Compact Cylinder SSA20X20B
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA20X20B is a genuine single-acting COMPACT cylinder (single acting, push type) with a Ø20mm bore and 20mm stroke. Air pushes the rod and an internal spring returns it, so one solenoid line drives the motion — ideal for short-stroke clamping and ejection in tight spaces.
- BoreØ20 mm
- Stroke20 mm
- Port sizeM5×0.8
- Acting typeSingle acting, push type
- Rod threadM4×0.7 (F) / M6×1.0 (B)
- CushionFixed NBR bumper
About the Airtac SSA Single-Acting Compact Cylinder SSA20X20B
The AirTAC SSA20X20B is a compact single-acting push-type cylinder where air pressure extends the rod and an internal mechanical spring retracts it. Operating at 0.5 MPa, it generates 134.1 N of net push force, a figure that already accounts for the return spring's resistance. This 20 mm bore, 20 mm stroke unit uses a single air line and one solenoid port, drastically reducing plumbing complexity in crowded machinery.
This specific SKU features a male M6x1.0 threaded piston rod end, replacing the standard female M4x0.7, for direct mounting of tooling. The short riveted body conserves axial mounting depth where standard cylinders cannot fit. End-of-stroke deceleration is handled by a fixed NBR bumper, which absorbs shock but is not an adjustable air cushion.
Airtac SSA Single-Acting Compact Cylinder SSA20X20B Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA20X20B |
|---|---|
| Series | SSA compact single-acting cylinder |
| Bore size | Ø20 mm |
| Stroke | 20 mm |
| Acting type | Single acting, push type |
| Port size | M5×0.8 |
| Rod end thread | M4×0.7 female / M6×1.0 male (B) |
| 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 NBR bumper |
| Max standard stroke | Up to 30 mm |
Specifications follow the official AirTAC SDA-family datasheet. Single-acting types start at 0.2 MPa (the spring must be overcome). Confirm against the product label before installation.
Net Output Force (Ø20mm, Push)
| Pressure | Push force (net) |
|---|---|
| 0.5 MPa | 134 N |
| 0.7 MPa | 197 N |
These are NET output forces — the return-spring force is already deducted. Single-acting push only; the spring performs the opposite stroke. Size with a safety margin.
Model Code: Airtac SSA Single-Acting Compact Cylinder SSA20X20B
| SSA | Compact single acting, push type cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×20 | Stroke length in mm (single-acting max 30 mm). |
| S | Built-in magnet for magnetic-switch sensing (omit = none). |
| B | Male-thread piston rod (omit = female thread). |
Thread: PT standard. SSA pushes out / spring returns; STA pulls in / spring extends. Related: SDA (double acting), SDAD (double rod), SDAJ (adjustable stroke).
Where the Airtac SSA Single-Acting Compact Cylinder SSA20X20B Is Used
Inline Part Ejection
Uses the 134.1 N net push force to positively eject machined components from a fixture, with the male M6x1.0 rod allowing direct threading of a custom ejector pin.
Confined Space Clamping
Ideal for holding light assemblies during a secondary process, leveraging the short riveted body to fit within tight multi-station indexing tables.
Carton Flap Folding
Employs the 20 mm stroke to push packaging flaps into position at high speed, relying on the fixed NBR bumper to absorb the end-of-stroke impact.
Is the Airtac SSA Single-Acting Compact Cylinder SSA20X20B the Right Cylinder?
When sizing this model, compare its 134.1 N net push at 0.5 MPa against adjacent bores: the SSA16 provides 80.5 N, while the SSA25 offers 216.9 N. A practical safe working load is roughly 80 N, allowing a vertical lift of approximately 6.8 kg with a 2:1 safety margin. The 20 mm stroke sits well below the 30 mm maximum limit for this series.
Remember that the internal spring drives the rod to its retracted rest position upon air loss; it cannot hold a mid-stroke load without live pressure. This configuration includes the male M6x1.0 rod thread, uses an M5x0.8 port, and lacks a piston magnet, meaning magnetic switches cannot be used. Operating pressure must be at least 0.2 MPa to overcome the spring, up to a maximum of 1.0 MPa.
Quick checklist
- ✓ Net push force at your working pressure
- ✓ Stroke ≤ 30 mm (single-acting limit)
- ✓ Single air line saves a valve/port
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.2 – 1.0 MPa operating pressure.
- check Remember the spring performs the return stroke.
- check Avoid side load on the short piston rod.
- check Front/rear covers are riveted — do not dismantle.
- check Installation by qualified personnel per AirTAC docs.
Airtac SSA Single-Acting Compact Cylinder SSA20X20B FAQ
This single-acting push cylinder provides a net force of 134.1 N at 0.5 MPa and 196.9 N at 0.7 MPa. These values already subtract the internal return spring resistance, giving you the true usable output for your design calculations.
No, this specific SKU does not include a piston magnet, so it cannot accept reed or electronic switches. You would need the -S option variant for position sensing. Additionally, it requires a minimum of 0.2 MPa operating pressure to overcome the return spring.
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