Airtac SSA Single-Acting Compact Cylinder SSA12X25B
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA12X25B is a genuine single-acting COMPACT cylinder (single acting, push type) with a Ø12mm 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.
- BoreØ12 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 SSA12X25B
The AirTAC SSA12X25B is a compact single-acting push-type cylinder where air pressure extends the rod and an internal spring retracts it. It generates 46.5 N of net push at 0.5 MPa, meaning the return spring force is already subtracted to give you a real design figure. The short riveted body saves axial mounting depth where a larger profile cylinder will not fit.
This specific SKU features a male M5x0.8 piston rod thread and a 6 mm rod diameter. Because it is a single-acting design, you only need one air line and one solenoid port to drive the motion, which reduces fitting complexity. A fixed NBR bumper decelerates the stroke end, though it is not an adjustable air cushion or a locking device.
Airtac SSA Single-Acting Compact Cylinder SSA12X25B Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA12X25B |
|---|---|
| Series | SSA compact single-acting cylinder |
| Bore size | Ø12 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 (Ø12mm, Push)
| Pressure | Push force (net) |
|---|---|
| 0.5 MPa | 47 N |
| 0.7 MPa | 69 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 SSA12X25B
| SSA | Compact single acting, push type cylinder series. |
|---|---|
| 12 | 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 SSA12X25B Is Used
Small Part Ejection
Uses the 46.5 N net push at 0.5 MPa to eject small molded components from a tight fixture, relying on the spring to reset automatically.
Light-Duty Clamping
Secures delicate electronic PCBs during soldering with a safe working load of 28 N, preventing damage while maintaining position.
Product Sorting Divert
Pushes lightweight cartons on a conveyor using the 25 mm stroke, with the single air line simplifying the manifold layout.
Is the Airtac SSA Single-Acting Compact Cylinder SSA12X25B the Right Cylinder?
When sizing this 12 mm bore, consider stepping up to the SSA16 which provides 80.5 N of net push at 0.5 MPa if your clamping force is insufficient. Conversely, the 12 mm bore is the smallest available in this series. A safe working load is roughly 28 N, or about 60 percent of the 46.5 N figure at 0.5 MPa, allowing a vertical lift of approximately 2.4 kg with a 2:1 safety margin.
This model has a 25 mm stroke, well within the 30 mm maximum standard stroke ceiling. 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 rest, so it cannot hold a mid-stroke load without external devices. This configuration includes a male rod thread and lacks a piston magnet, meaning it cannot support reed or electronic switches without the -S option.
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 SSA12X25B FAQ
The SSA12X25B provides a net push force of 46.5 N at 0.5 MPa and 69.2 N at 0.7 MPa. These values already account for the internal return spring resistance, giving you the actual usable output force.
No, with air released the internal spring drives the rod back to its retracted rest position. It does not hold a mid-stroke load, and you would need an external rod lock for holding without live pressure. It also requires a minimum of 0.2 MPa to overcome the spring.
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