Airtac SSA Single-Acting Compact Cylinder SSA40X25B
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA40X25B is a genuine single-acting COMPACT cylinder (single acting, push type) with a Ø40mm 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.
- BoreØ40 mm
- Stroke25 mm
- Port sizePT1/8
- Acting typeSingle acting, push type
- Rod threadM8×1.25 (F) / M14×1.5 (B)
- CushionFixed NBR bumper
About the Airtac SSA Single-Acting Compact Cylinder SSA40X25B
The AirTAC SSA40X25B is a compact single-acting push-type cylinder where air pressure extends the rod and an internal mechanical spring retracts it. It generates 545.6 N of net push at 0.5 MPa, with the return spring force already subtracted to give you a true design figure. This unit features a 16 mm piston rod with a male M14x1.5 thread end.
Because it requires only one air line and a single solenoid port, plumbing is vastly simplified in crowded fixtures. The short riveted body saves axial mounting depth compared to round-body alternatives. A fixed NBR bumper decelerates the stroke end, and operating speeds of 50-500 mm/s are attainable.
Airtac SSA Single-Acting Compact Cylinder SSA40X25B Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA40X25B |
|---|---|
| Series | SSA compact single-acting cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 mm |
| Acting type | Single acting, push type |
| Port size | PT1/8 |
| Rod end thread | M8×1.25 female / M14×1.5 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 (Ø40mm, Push)
| Pressure | Push force (net) |
|---|---|
| 0.5 MPa | 546 N |
| 0.7 MPa | 797 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 SSA40X25B
| SSA | Compact single acting, push type cylinder series. |
|---|---|
| 40 | 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 SSA40X25B Is Used
Stamping Ejector
Uses the 545.6 N net push at 0.5 MPa to eject stamped metal parts from a die, relying on the internal spring to reset the pin between cycles.
Carton Flap Folder
Extends 25 mm to fold heavy corrugated carton flaps during automated packing, with the single air line simplifying the valve manifold.
Press Brake Stop
Acts as a compact back-gauge stop for sheet metal, where the short riveted body minimizes axial footprint and the male M14x1.5 rod mounts the contact finger.
Is the Airtac SSA Single-Acting Compact Cylinder SSA40X25B the Right Cylinder?
When sizing this model, consider the neighboring bores: stepping down to the SSA32 yields 346.6 N of net push at 0.5 MPa, while stepping up to the SSA50 provides 874.7 N. This SSA40X25B strikes a middle ground with 545.6 N at 0.5 MPa, offering a safe working load of roughly 327 N (about 60% of the rated force) or a vertical lift capacity of approximately 27.8 kg with a 2:1 safety margin.
This configuration has a 25 mm stroke, well within the 30 mm maximum standard stroke ceiling. It uses a PT1/8 port and lacks the -S magnet option, meaning it cannot support magnetic sensing. The -B suffix denotes the male M14x1.5 rod thread. Remember that on air loss the spring drives the rod to its retracted rest position; it does not hold a mid-stroke load.
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 SSA40X25B FAQ
The net push force is 545.6 N at 0.5 MPa and 796.9 N at 0.7 MPa. These figures already account for the internal return spring resistance, giving you the actual usable output force for your calculations.
No. It is a single-acting push cylinder that requires a minimum of 0.2 MPa to overcome the spring. If air is released or lost, the spring immediately drives the rod back to its retracted position. It cannot hold a mid-stroke load without live pressure or an external locking device.
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