Airtac SSA Single-Acting Compact Cylinder SSA16X20S
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA16X20S is a genuine single-acting COMPACT cylinder (single acting, push type) with a Ø16mm 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.
- BoreØ16 mm
- Stroke20 mm
- Port sizeM5×0.8
- Acting typeSingle acting, push type
- Rod threadM3×0.5 (F) / M5×0.8 (B)
- CushionFixed NBR bumper
About the Airtac SSA Single-Acting Compact Cylinder SSA16X20S
The AirTAC SSA16X20S is a compact single-acting push-type cylinder where air pressure extends the rod and an internal spring retracts it. It provides 80.5 N of net push force at 0.5 MPa, meaning the return spring's resistance is already subtracted from the raw pneumatic force. This 16 mm bore unit uses a 6 mm piston rod and an M5x0.8 port.
Because it only requires a single air line and one solenoid port to drive the motion, plumbing is simplified and valve costs drop in tight fixtures. The short riveted body minimizes axial mounting depth where round-body or profile cylinders cannot fit. A fixed NBR bumper handles end-of-stroke deceleration, and the built-in -S magnet enables position sensing with AirTAC reed or electronic switches.
Airtac SSA Single-Acting Compact Cylinder SSA16X20S Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA16X20S |
|---|---|
| Series | SSA compact single-acting cylinder |
| Bore size | Ø16 mm |
| Stroke | 20 mm |
| Acting type | Single acting, push type |
| Port size | M5×0.8 |
| Rod end thread | M3×0.5 female / M5×0.8 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 (Ø16mm, Push)
| Pressure | Push force (net) |
|---|---|
| 0.5 MPa | 81 N |
| 0.7 MPa | 121 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 SSA16X20S
| SSA | Compact single acting, push type cylinder series. |
|---|---|
| 16 | 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 SSA16X20S Is Used
Small Part Ejection
Uses the 80.5 N net push stroke to eject small machined components from a fixture without requiring a complex dual-line pneumatic setup.
Package Diversion
Employs the spring-return action to briefly extend a 20 mm stroke diverter arm on a conveyor, safely retracting when air is removed.
Light Carton Stopping
Acts as a compact stop gate in material handling lines, relying on the short riveted body to fit between tight conveyor rollers.
Is the Airtac SSA Single-Acting Compact Cylinder SSA16X20S the Right Cylinder?
When sizing this model, evaluate the neighboring bores using real 0.5 MPa net push figures. Dropping down to the SSA12 yields 46.5 N, while stepping up to the SSA20 provides 134.1 N. For the SSA16X20S, a safe working load is approximately 48 N (about 60% of the 80.5 N figure), allowing a vertical lift of roughly 4.1 kg with a 2:1 margin.
This configuration features a 16 mm bore, a 20 mm stroke (within the 30 mm series maximum), an M5x0.8 port, and a female M3x0.5 rod-end thread. Operating pressure must be 0.2-1.0 MPa, as at least 0.2 MPa is required to overcome the internal spring. Remember that upon air loss the spring drives the rod back to its retracted state; it will not hold a mid-stroke load without live pressure or an external locking device.
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 SSA16X20S FAQ
The SSA16X20S provides a net push force of 80.5 N at 0.5 MPa and 120.7 N at 0.7 MPa. These values already account for the subtraction of the internal return spring's resistance.
Air pressure extends the rod, and the internal spring retracts it when air is released, requiring a minimum of 0.2 MPa to overcome the spring. The built-in -S magnet allows tracking with either reed or electronic switches.
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