Airtac SSA Single-Acting Compact Cylinder SSA20X25S
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA20X25S is a genuine single-acting COMPACT cylinder (single acting, push type) with a Ø20mm 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.
- BoreØ20 mm
- Stroke25 mm
- Port sizeM5×0.8
- Acting typeSingle acting, push type
- Rod threadM4×0.7 (F) / M6×1.0 (B)
- CushionFixed NBR bumper
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SSA Single-Acting Compact Cylinder SSA20X25S
The AirTAC SSA20X25S is a compact single-acting push-type cylinder where air pressure extends the rod and an internal mechanical spring retracts it. Because it only needs one air line and one solenoid port, plumbing is drastically simplified while delivering 134.1 N of net push at 0.5 MPa. The quoted force is already net of the return spring, giving you a real design figure rather than raw air pressure.
This 20 mm bore unit features a short riveted body that minimizes axial mounting depth in crowded machinery. It carries the -S option for a built-in piston magnet compatible with AirTAC reed or electronic switches. A fixed NBR bumper handles end-of-stroke deceleration, and the 8 mm rod uses an M4x0.7 female thread.
Airtac SSA Single-Acting Compact Cylinder SSA20X25S Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA20X25S |
|---|---|
| Series | SSA compact single-acting cylinder |
| Bore size | Ø20 mm |
| Stroke | 25 mm |
| Acting type | Single acting, push type |
| Port size | M5×0.8 |
| Rod end thread | M4×0.7 female / M6×1.0 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 (Ø20mm, Push)
| Pressure | Push force (net) |
|---|---|
| 0.5 MPa | 134 N |
| 0.7 MPa | 197 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 SSA20X25S
| SSA | Compact single acting, push type cylinder series. |
|---|---|
| 20 | 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 SSA20X25S Is Used
Short-Stroke Part Ejection
Uses the 134.1 N net push at 0.5 MPa to positively eject machined components from a fixture, with the spring safely retracting the 8 mm rod between cycles.
Transfer Line Diverter
Fits into tight transfer line gaps using its compact riveted body, extending 25 mm to divert lightweight cartons before the internal spring pulls it back.
PCB Edge Clamping
Applies delicate holding force for electronics assembly, while the built-in S magnet works with reed or electronic switches to confirm clamp position.
Is the Airtac SSA Single-Acting Compact Cylinder SSA20X25S the Right Cylinder?
When sizing this model, compare its 134.1 N net push at 0.5 MPa against adjacent bores. Stepping down, the SSA16 yields 80.5 N; stepping up, the SSA25 provides 216.9 N. This makes the 20 mm bore ideal for a safe working load around 80 N, which provides a 2:1 safety margin for lifting roughly 6.8 kg vertically.
The maximum standard stroke for this series is 30 mm, so your 25 mm requirement is well within range. Keep in mind that the spring actively drives the rod back to rest upon air loss, meaning it will not hold a mid-stroke load without live pressure or an external lock. This SSA20X25S configuration includes the S magnet, an 8 mm rod, an M5x0.8 port, and a female M4x0.7 rod-end thread.
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 SSA20X25S FAQ
This cylinder provides a net push force of 134.1 N at 0.5 MPa and 196.9 N at 0.7 MPa. It requires an operating pressure of 0.2-1.0 MPa, as at least 0.2 MPa is needed to overcome the internal return spring.
No, it cannot hold a mid-stroke load. It is a single-acting push type where the internal spring retracts the rod when air is released. For load holding without live air pressure, you would need a double-acting cylinder with an external rod lock.
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