Airtac SSA Single-Acting Compact Cylinder SSA25X15
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA25X15 is a genuine single-acting COMPACT cylinder (single acting, push type) with a Ø25mm bore and 15mm 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
- Stroke15 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 SSA25X15
The AirTAC SSA25X15 is a compact single-acting push-type cylinder where air pressure extends the rod and an internal mechanical spring handles the retraction. It yields 216.9 N of net push at 0.5 MPa, with the return spring force already subtracted from the raw air pressure. This 25 mm bore unit uses a 10 mm piston rod and an M5x0.8 port.
Its short riveted body drastically minimizes axial mounting depth compared to traditional round-body options, fitting easily into crowded fixtures. Because only a single air line and one solenoid valve port are required to drive the motion, plumbing complexity and fitting costs drop significantly. A fixed NBR bumper at the end of travel absorbs shock without offering adjustable cushioning.
Airtac SSA Single-Acting Compact Cylinder SSA25X15 Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA25X15 |
|---|---|
| Series | SSA compact single-acting cylinder |
| Bore size | Ø25 mm |
| Stroke | 15 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 SSA25X15
| SSA | Compact single acting, push type cylinder series. |
|---|---|
| 25 | Bore size in mm. |
| ×15 | 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 SSA25X15 Is Used
Short-Stroke Part Clamping
Uses the 216.9 N net push at 0.5 MPa to secure light aluminum workpieces against a fixed stop during milling operations.
Package Diverter Ejector
Extends 15 mm rapidly to push small cartons off a main conveyor belt, relying on the internal spring to retract instantly between cycles.
Compact Fixture Pinning
Fits into tight automated assembly stations where axial depth is restricted, driving a locating pin into a mating hole with precise force.
Is the Airtac SSA Single-Acting Compact Cylinder SSA25X15 the Right Cylinder?
When sizing this model, consider the neighboring bores: stepping down to the SSA20 provides 134.1 N net push at 0.5 MPa, while moving up to the SSA32 offers 346.6 N. This SSA25X15 configuration features a 15 mm stroke, well within the 30 mm series maximum, and requires an operating pressure between 0.2 and 1.0 MPa to function properly. The minimum 0.2 MPa is necessary just to overcome the return spring.
For load handling, releasing air pressure lets the spring drive the rod back to its rest position, meaning this cylinder cannot hold a mid-stroke load without live pressure. A safe working load is roughly 130 N, or about 60% of the 0.5 MPa figure, which allows a vertical lift of approximately 11.1 kg with a 2:1 safety margin. This specific SKU lacks the -S magnet option, so it cannot support reed or electronic switches, and it comes with a female M5x0.8 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 SSA25X15 FAQ
This single-acting push cylinder provides 216.9 N of net force at 0.5 MPa and 315.1 N at 0.7 MPa. These figures already account for the internal return spring resistance, giving you the true usable output for your design.
No, if air is lost the internal spring immediately drives the rod back to its fully retracted rest position. It cannot hold a mid-stroke load, and it requires at least 0.2 MPa of operating pressure to overcome the spring and extend.
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