Airtac SSA Single-Acting Compact Cylinder SSA25X5S
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA25X5S 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 SSA25X5S
The AirTAC SSA25X5S is a compact single-acting push-type cylinder where air pressure extends the rod and an internal spring retracts it. This bore 25 mm unit delivers 216.9 N net push at 0.5 MPa, with the return-spring force already subtracted from the raw air force for accurate sizing. Its short riveted body drastically reduces axial mounting depth compared to standard round-body alternatives.
A single air line and one solenoid port drive the motion, simplifying plumbing and cutting valve costs. The fixed NBR bumper decelerates the stroke end but is not an adjustable air cushion. Because this model includes the -S magnet, it supports position sensing using an AirTAC reed or electronic switch.
Airtac SSA Single-Acting Compact Cylinder SSA25X5S Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA25X5S |
|---|---|
| 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 SSA25X5S
| 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 SSA25X5S Is Used
Short-Travel Part Clamping
Applies 216.9 N of net clamping pressure at 0.5 MPa to secure small aluminum workpieces during light milling operations.
Package Diverter Ejector
Uses the 5 mm stroke to push lightweight cardboard cartons off a main conveyor belt into a sorting chute.
Lab Fixture Positioning
Extends a sensor probe into a test bath, relying on the internal spring to safely retract the rod when air pressure drops.
Is the Airtac SSA Single-Acting Compact Cylinder SSA25X5S the Right Cylinder?
When sizing this unit, verify the 5 mm stroke meets your short-travel requirement without exceeding the 30 mm standard ceiling. If 134.1 N at 0.5 MPa is sufficient, the smaller SSA20 offers a narrower footprint; if your clamping needs exceed 300 N, step up to the SSA32 which provides 346.6 N at 0.5 MPa. A safe working load is roughly 130 N, allowing a vertical lift of about 11.1 kg with a 2:1 margin.
Confirm the bore 25 mm, 5 mm stroke, M5x0.8 port, and the female M5x0.8 rod-end thread. Operating pressure must be 0.2-1.0 MPa, as at least 0.2 MPa is required to overcome the spring. Remember the spring drives retraction upon air loss, so the SSA25X5S will not hold a mid-stroke load without external live pressure or a rod lock.
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 SSA25X5S FAQ
The SSA25X5S provides 216.9 N of net push force at 0.5 MPa and 315.1 N at 0.7 MPa. These figures already account for the internal return spring, giving you the true output for your design calculations.
No, it is a single-acting push cylinder where the spring retracts the rod upon air loss. It requires a minimum of 0.2 MPa to overcome the spring and cannot hold a mid-stroke load without external live pressure or a mechanical rod lock.
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