Airtac SSA Single-Acting Compact Cylinder SSA16X25S
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA16X25S is a genuine single-acting COMPACT cylinder (single acting, push type) with a Ø16mm bore and 25mm 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
- Stroke25 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 SSA16X25S
The AirTAC SSA16X25S is a compact single-acting push-type cylinder where air pressure extends the rod and an internal mechanical spring handles the retraction. Because it is spring-returned, you only need a single air line and one solenoid valve port to drive the motion, cutting down on fitting complexity and saving valuable manifold space. This 16 mm bore configuration generates 80.5 N of net push force at 0.5 MPa, a figure that already accounts for the return spring's resistance.
Designed for tight fixtures, the short riveted body significantly reduces axial mounting depth compared to standard round-body alternatives. This specific model includes a built-in piston magnet (-S) for direct mounting of AirTAC reed or electronic switches along the body sensor grooves. Inside, a fixed NBR bumper absorbs the end-of-stroke shock, as there is no adjustable air cushion. The system operates at 50-500 mm/s, requires 0.2-1.0 MPa to overcome the spring, and functions reliably across -20 to +70 C.
Airtac SSA Single-Acting Compact Cylinder SSA16X25S Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA16X25S |
|---|---|
| Series | SSA compact single-acting cylinder |
| Bore size | Ø16 mm |
| Stroke | 25 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 SSA16X25S
| SSA | Compact single acting, push type cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×25 | 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 SSA16X25S Is Used
Small Part Ejection
Uses the 80.5 N net push to eject small molded components from a tight fixture, relying on the internal spring to reset the plunger automatically.
Package Diverting
Employs the 25 mm stroke to push lightweight cartons off a conveyor belt, with the single air line simplifying the pneumatic manifold layout.
PCB Clamping
Applies gentle holding force on electronic boards during assembly, using the compact riveted body to fit within densely packed routing stations.
Is the Airtac SSA Single-Acting Compact Cylinder SSA16X25S the Right Cylinder?
When sizing this unit, evaluate the net output relative to your neighbors. Dropping down to an SSA12 yields 46.5 N at 0.5 MPa, while stepping up to an SSA20 provides 134.1 N at 0.5 MPa. The 80.5 N rating here translates to a safe working load of roughly 48 N (about 60% capacity) or a vertical lift of approximately 4.1 kg with a 2:1 safety margin. This 25 mm stroke sits comfortably under the 30 mm maximum ceiling for the series.
Remember that this is a spring-return actuator; if air pressure is lost, the spring drives the rod back to its retracted state, meaning it cannot hold a mid-stroke load without live pressure or an external locking device. This SSA16X25S features a 6 mm piston rod, an M5x0.8 air port, and a female M3x0.5 rod-end thread. The included magnet supports position sensing, and the fixed NBR bumper manages impact deceleration without adjustable cushioning.
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 SSA16X25S FAQ
The net push force is 80.5 N at 0.5 MPa and 120.7 N at 0.7 MPa. These values already subtract the return spring resistance, giving you a real design figure for your pushing application.
Air pressure extends the rod, while the internal spring retracts it, requiring a minimum of 0.2 MPa operating pressure to overcome the spring. The -S option includes a built-in magnet for tracking position with AirTAC reed or electronic switches.
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