Airtac SSA Single-Acting Compact Cylinder SSA50X20
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA50X20 is a genuine single-acting COMPACT cylinder (single acting, push type) with a Ø50mm 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.
- BoreØ50 mm
- Stroke20 mm
- Port sizePT1/4
- Acting typeSingle acting, push type
- Rod threadM10×1.5 (F) / M18×1.5 (B)
- CushionFixed NBR bumper
About the Airtac SSA Single-Acting Compact Cylinder SSA50X20
The AirTAC SSA50X20 is a compact single-acting push-type cylinder where air pressure extends the rod and an internal spring retracts it. It provides 874.7 N of net push at 0.5 MPa, making it suitable for heavy-duty short-stroke tasks. Because the return spring force is already subtracted, you can size directly to this real-world output figure.
This model uses a short riveted body to minimize axial mounting depth in crowded machinery. It requires only one air line and one solenoid port to drive the motion, cutting fitting complexity. The unit relies on a fixed NBR bumper to absorb end-of-stroke shock rather than an adjustable cushion, and this SKU lacks a piston magnet so it cannot support position sensing.
Airtac SSA Single-Acting Compact Cylinder SSA50X20 Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA50X20 |
|---|---|
| Series | SSA compact single-acting cylinder |
| Bore size | Ø50 mm |
| Stroke | 20 mm |
| Acting type | Single acting, push type |
| Port size | PT1/4 |
| Rod end thread | M10×1.5 female / M18×1.5 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 (Ø50mm, Push)
| Pressure | Push force (net) |
|---|---|
| 0.5 MPa | 875 N |
| 0.7 MPa | 1267 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 SSA50X20
| SSA | Compact single acting, push type cylinder series. |
|---|---|
| 50 | 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 SSA50X20 Is Used
Heavy-Duty Stamping Ejector
Uses the 874.7 N net push to eject thick metal blanks from a die, relying on the spring return to reset quickly without a second valve.
Pneumatic Riveting Clamp
Holds structural plates firmly in place during fastening, where the compact riveted body fits neatly within tight assembly jig clearances.
Pallet Load Stopper
Extends 20 mm to halt incoming heavy pallets on a conveyor, absorbing the impact via the fixed NBR bumper before springing back.
Is the Airtac SSA Single-Acting Compact Cylinder SSA50X20 the Right Cylinder?
When sizing this 50 mm bore actuator, compare its 874.7 N net push at 0.5 MPa against adjacent models: the SSA40 yields 545.6 N, while the SSA63 provides 1382.6 N. A practical safe working load is roughly 525 N, or about 60 percent of the 0.5 MPa rating, allowing a vertical lift of approximately 44.6 kg with a 2:1 safety margin.
Confirm the 20 mm stroke is within the 30 mm maximum standard limit for this series. Remember that the spring drives the rod back to rest upon air loss, so the SSA50X20 will not hold a mid-stroke load without external live pressure. This specific configuration features a PT1/4 port, a 20 mm rod, a female M10x1.5 rod-end thread, and no magnet.
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 SSA50X20 FAQ
The SSA50X20 delivers 874.7 N of net push at 0.5 MPa and 1267.4 N at 0.7 MPa. These figures already account for the internal return spring resistance, giving you the true usable output force.
No, it cannot hold a mid-stroke load. As a single-acting push cylinder, the internal spring drives the rod back to its retracted rest position when air is released. It requires a minimum of 0.2 MPa to overcome the spring and extend.
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