Airtac SSA Single-Acting Compact Cylinder SSA20X5S
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA20X5S is a genuine single-acting COMPACT cylinder (single acting, push type) with a Ø20mm bore and 5mm 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
- Stroke5 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 SSA20X5S
The AirTAC SSA20X5S is a compact single-acting push-type cylinder where air pressure extends the rod and an internal spring retracts it. It provides 134.1 N of net push force at 0.5 MPa, making it suitable for short 5 mm ejection tasks. Because the return spring force is already subtracted, this figure represents your true usable output.
This model features a built-in piston magnet for position sensing with AirTAC reed or electronic switches. The short riveted body saves axial mounting depth in crowded fixtures, and only one air line is needed to drive the motion, reducing valve and fitting costs.
Airtac SSA Single-Acting Compact Cylinder SSA20X5S Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA20X5S |
|---|---|
| Series | SSA compact single-acting cylinder |
| Bore size | Ø20 mm |
| Stroke | 5 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 SSA20X5S
| SSA | Compact single acting, push type cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×5 | 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 SSA20X5S Is Used
Short-Stroke Part Ejection
Uses the 5 mm stroke to push machined parts out of a fixture quickly, relying on the 134.1 N net push to overcome friction.
Compact Clamping Arm
Applies pneumatic pressure to hold a workpiece, while the spring return automatically releases the clamp when air is cut off.
Transfer Line Diverter
Fits into tight side-mount spaces to deflect small products, using the single air line to simplify the pneumatic manifold.
Is the Airtac SSA Single-Acting Compact Cylinder SSA20X5S the Right Cylinder?
When sizing this bore, note that a smaller SSA16 yields 80.5 N net push at 0.5 MPa, while the larger SSA25 provides 216.9 N. The 20 mm bore hits a practical middle ground, offering a safe working load of roughly 80 N for a 2:1 margin. Standard strokes max out at 30 mm for this series.
This SSA20X5S configuration includes the -S magnet option and uses an M5x0.8 port with a female M4x0.7 rod-end thread. Remember that the fixed NBR bumper decelerates the stroke end but cannot hold a mid-stroke load without live air pressure.
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 SSA20X5S FAQ
The net push force is 134.1 N at 0.5 MPa and 196.9 N at 0.7 MPa. These values already account for the internal return spring resistance, giving you the true output capacity.
Air extends the rod, and the internal spring retracts it when air is released. You must supply at least 0.2 MPa to overcome the spring and initiate the forward stroke.
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