Airtac SSA Single-Acting Compact Cylinder SSA25X5SB
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA25X5SB is a genuine single-acting COMPACT cylinder (single acting, push type) with a Ø25mm bore and 5mm 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.
- BoreØ25 mm
- Stroke5 mm
- Port sizeM5×0.8
- Acting typeSingle acting, push type
- Rod threadM5×0.8 (F) / M8×1.25 (B)
- CushionFixed NBR bumper
About the Airtac SSA Single-Acting Compact Cylinder SSA25X5SB
The AirTAC SSA25X5SB is a compact single-acting push-type cylinder where air pressure extends the rod and an internal mechanical spring handles the retraction. Delivering 216.9 N of net push force at 0.5 MPa, it is engineered for short-stroke actuation in confined footprints. The short riveted body specifically saves axial mounting depth where a standard round-body or profile cylinder cannot fit.
This configuration includes a built-in piston magnet for position sensing with AirTAC reed or electronic switches, and a male M8x1.25 threaded rod end. The quoted force is already net of the return spring, meaning it is a real design figure rather than raw air pressure. A fixed NBR bumper absorbs end-of-stroke shock, as there is no adjustable air cushion on this unit.
Airtac SSA Single-Acting Compact Cylinder SSA25X5SB Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA25X5SB |
|---|---|
| Series | SSA compact single-acting cylinder |
| Bore size | Ø25 mm |
| Stroke | 5 mm |
| Acting type | Single acting, push type |
| Port size | M5×0.8 |
| Rod end thread | M5×0.8 female / M8×1.25 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 (Ø25mm, Push)
| Pressure | Push force (net) |
|---|---|
| 0.5 MPa | 217 N |
| 0.7 MPa | 315 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 SSA25X5SB
| SSA | Compact single acting, push type cylinder series. |
|---|---|
| 25 | Bore size in mm. |
| ×5 | 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 SSA25X5SB Is Used
Short-Stroke Part Clamping
Uses the 216.9 N net push at 0.5 MPa to secure light metal workpieces against a fixture stop before a machining cycle begins.
Package Diverter Gate
Extends 5 mm to nudge cartons on a packaging line, relying on the internal spring to instantly retract when air pressure drops.
Ejector Station
Pushes finished small plastic components out of a mold cavity, saving axial space in crowded automated machinery with its riveted body.
Is the Airtac SSA Single-Acting Compact Cylinder SSA25X5SB the Right Cylinder?
When sizing this 25 mm bore actuator, compare its 216.9 N net push at 0.5 MPa against adjacent bores. Stepping down, the SSA20 provides 134.1 N, while stepping up to the SSA32 yields 346.6 N. A practical safe working load is approximately 130 N, which equates to a vertical lift of about 11.1 kg when applying a 2:1 safety margin.
This model features a 5 mm stroke, well under the 30 mm series ceiling, an M5x0.8 air port, and the -B male rod thread. Because it is spring-returned, the SSA25X5SB cannot hold a mid-stroke load on air loss; the spring drives the rod to its rest position. Operating pressure must be at least 0.2 MPa to overcome the internal spring, up to a maximum of 1.0 MPa.
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 SSA25X5SB FAQ
The net push force is 216.9 N at 0.5 MPa and 315.1 N at 0.7 MPa. These figures already subtract the return spring resistance, giving you the actual usable output for your design calculations.
No, the internal spring drives the rod back to its retracted rest position on air loss. It cannot hold a mid-stroke load. Additionally, a minimum operating pressure of 0.2 MPa is required to overcome the spring and extend the rod.
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