Airtac SSA Single-Acting Compact Cylinder SSA12X20SB
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA12X20SB is a genuine single-acting COMPACT cylinder (single acting, push type) with a Ø12mm 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.
- BoreØ12 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 SSA12X20SB
The AirTAC SSA12X20SB is a compact single-acting push-type cylinder where air pressure extends the rod and an internal spring retracts it. This 12 mm bore model yields 46.5 N of net push at 0.5 MPa, making it suitable for light-duty clamping and ejection tasks.
It includes a built-in piston magnet (-S) for direct mounting of AirTAC reed or electronic switches, and a male-thread piston rod (-B) sized at M5x0.8. The short riveted body conserves axial mounting depth in crowded fixtures, and a fixed NBR bumper absorbs end-of-stroke shock without requiring adjustment.
Airtac SSA Single-Acting Compact Cylinder SSA12X20SB Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA12X20SB |
|---|---|
| Series | SSA compact single-acting cylinder |
| Bore size | Ø12 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 (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 SSA12X20SB
| SSA | Compact single acting, push type cylinder series. |
|---|---|
| 12 | 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 SSA12X20SB Is Used
Small Part Ejection
Uses the 46.5 N push stroke to eject small molded components from a tight fixture without requiring complex plumbing.
Light Product Diverting
Employs the male M5x0.8 rod to push lightweight packages on a conveyor line, relying on the internal spring for a fail-safe return.
Lab Test Clamping
Secures delicate samples during testing, taking advantage of the compact riveted body to fit within confined laboratory equipment.
Is the Airtac SSA Single-Acting Compact Cylinder SSA12X20SB the Right Cylinder?
When sizing this unit, consider the neighboring bore: stepping down is not an option as 12 mm is the smallest available, while stepping up to the SSA16 provides 80.5 N of net push at 0.5 MPa. This SSA12X20SB configuration includes a 20 mm stroke (within the 30 mm maximum limit), an M5x0.8 air port, a male M5x0.8 rod thread, and a magnetic piston.
Because it is spring-return, the cylinder cannot hold a mid-stroke load without live air pressure. For a safe working load, plan for approximately 28 N, which provides a 2:1 margin and allows a vertical lift of roughly 2.4 kg. Operating pressure must be maintained between 0.2 and 1.0 MPa to ensure proper function.
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 SSA12X20SB 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 subtraction of the internal return spring force.
No, the spring drives the rod back to its rest position when air is released. It requires a minimum of 0.2 MPa to overcome the spring and cannot hold a mid-stroke load without live pressure.
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