Airtac SSA Single-Acting Compact Cylinder SSA12X25SB
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA12X25SB 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 SSA12X25SB
The AirTAC SSA12X25SB is a compact single-acting push-type cylinder where air pressure extends the rod and an internal spring handles the retraction. It provides 46.5 N of net push at 0.5 MPa, meaning the return spring force is already subtracted from the raw air force. This 12 mm bore unit uses a short riveted body that minimizes axial mounting depth in crowded machinery.
This specific configuration includes a built-in piston magnet for AirTAC reed or electronic switches, and a male M5x0.8 threaded rod end instead of the default female thread. Because it requires only one air line and one solenoid port to drive the motion, plumbing is greatly simplified for short-stroke tasks.
Airtac SSA Single-Acting Compact Cylinder SSA12X25SB Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA12X25SB |
|---|---|
| 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 SSA12X25SB
| 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 SSA12X25SB Is Used
Small Part Ejection
Uses the 46.5 N net push to eject lightweight molded components from a tight fixture, relying on the spring to retract the rod when air is cut.
Thin-Wall Clamping
Secures delicate packaging materials against a stop using the male M5x0.8 rod end, preventing damage while maintaining position during sealing.
Lab Test Actuation
Applies a controlled 28 N safe working load to trigger micro-switches or test probes, benefiting from the single air line to reduce valve complexity.
Is the Airtac SSA Single-Acting Compact Cylinder SSA12X25SB the Right Cylinder?
When sizing this model, consider the neighboring bore: stepping up to the SSA16 increases the net push to 80.5 N at 0.5 MPa, while stepping down to a smaller bore is not available in this series. The maximum standard stroke for this family is 30 mm, and this 25 mm unit operates safely within that limit. Operating pressure must be at least 0.2 MPa to overcome the internal spring.
Confirm the 12 mm bore, 25 mm stroke, M5x0.8 port, male M5x0.8 rod thread, and the included magnet. The safe working load is approximately 28 N, which is about 60% of the 46.5 N figure at 0.5 MPa. If you need to hold a mid-stroke load without live pressure, this spring-return design will not lock in place; you would need an external device or a double-acting SDA cylinder.
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 SSA12X25SB FAQ
The net push force is 46.5 N at 0.5 MPa and 69.2 N at 0.7 MPa. These figures already account for the internal return spring resistance, giving you the true design output.
No, the internal spring drives the rod back to its retracted rest position on air loss. It cannot hold a mid-stroke load, and operating pressure must be at least 0.2 MPa to overcome the spring.
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