Airtac SSA Single-Acting Compact Cylinder SSA25X25B
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA25X25B is a genuine single-acting COMPACT cylinder (single acting, push type) with a Ø25mm 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.
- BoreØ25 mm
- Stroke25 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 SSA25X25B
The AirTAC SSA25X25B is a compact single-acting push-type cylinder where air pressure extends the rod and an internal mechanical spring handles the retraction. Because it only requires a single air line and one solenoid port to drive the motion, you cut down on fitting complexity and save valuable valve manifold space. This bore size yields a true 216.9 N of net push at 0.5 MPa, a figure that already accounts for the return spring force.
Designed with a short riveted body, this unit saves axial mounting depth in tight fixtures compared to traditional round-body options. It features a 10 mm piston rod with a male M8x1.25 thread end, and relies on a fixed NBR bumper to absorb end-of-stroke shock rather than an adjustable cushion. Please note this specific SKU lacks a piston magnet, so it cannot support position sensing without upgrading to the -S variant.
Airtac SSA Single-Acting Compact Cylinder SSA25X25B Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA25X25B |
|---|---|
| Series | SSA compact single-acting cylinder |
| Bore size | Ø25 mm |
| Stroke | 25 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 SSA25X25B
| SSA | Compact single acting, push type cylinder series. |
|---|---|
| 25 | 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 SSA25X25B Is Used
Short-Stroke Part Clamping
Leverage the 216.9 N net push at 0.5 MPa to secure aluminum workpieces during light CNC milling, using the male M8x1.25 rod to thread on a custom clamp face.
Package Diverter Ejection
Deploy the 25 mm stroke to kick small cartons off a packing line rapidly, with the spring-return design ensuring the diverter retracts cleanly when air is removed.
Compact Insertion Press
Fit the short riveted body into a crowded assembly cell to press bearings into housings, saving axial footprint while maintaining a safe 130 N working load.
Is the Airtac SSA Single-Acting Compact Cylinder SSA25X25B the Right Cylinder?
When sizing this model, compare its 216.9 N net push at 0.5 MPa against adjacent bores: stepping down to the SSA20 yields 134.1 N, while moving up to the SSA32 provides 346.6 N. A practical safe working load is roughly 130 N, which equates to a vertical lift capacity of about 11.1 kg when applying a 2:1 safety margin. This 25 mm bore uses an M5x0.8 air port and operates at 50-500 mm/s.
The 25 mm stroke sits comfortably below the 30 mm maximum standard limit for this series. Remember that the spring actively drives the rod back to its rest position upon air loss; it will not hold a mid-stroke load. For secure load holding without live air pressure, you would need an external rod lock or a double-acting SDA cylinder. This configuration includes the -B option for a male-threaded rod and no magnet.
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 SSA25X25B FAQ
This model provides a net push force of 216.9 N at 0.5 MPa and 315.1 N at 0.7 MPa. These values already have the internal return spring force subtracted, giving you the true usable output for your design calculations.
No, the internal spring drives the rod back to its fully retracted rest position when air is released, so it cannot lock or hold a load mid-stroke. Additionally, a minimum operating pressure of 0.2 MPa is required to overcome the spring and extend the rod.
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