Airtac SSA Single-Acting Compact Cylinder SSA40X25S
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA40X25S 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 SSA40X25S
The AirTAC SSA40X25S is a compact single-acting push-type cylinder where air pressure extends the rod and an internal mechanical spring handles the retraction. Driven by a 40 mm bore, it generates 545.6 N of net push force at 0.5 MPa. Because the quoted output already subtracts the return-spring resistance, you can size directly to this figure without manual derating.
This model features a built-in piston magnet for AirTAC reed or electronic switches. Its short riveted body minimizes axial mounting depth in crowded machinery, while a fixed NBR bumper absorbs end-of-stroke shock without requiring adjustment.
Airtac SSA Single-Acting Compact Cylinder SSA40X25S Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA40X25S |
|---|---|
| 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 SSA40X25S
| 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 SSA40X25S Is Used
Stamping Ejector
Uses the 545.6 N net push at 0.5 MPa to eject formed metal parts from a die, relying on the internal spring to retract the pin clear of the tooling.
Pallet Diverter
Extends a 25 mm stroke to push heavy pallets onto a secondary conveyor line, with the compact riveted body fitting neatly within the conveyor frame depth.
Carton Clamping Stop
Applies 796.9 N of force at 0.7 MPa to hold corrugated cartons momentarily for labeling, releasing automatically when air pressure is removed.
Is the Airtac SSA Single-Acting Compact Cylinder SSA40X25S the Right Cylinder?
When sizing this 40 mm bore unit, compare its 545.6 N net push at 0.5 MPa against adjacent bores. Stepping down, the SSA32 yields 346.6 N; stepping up, the SSA50 provides 874.7 N. This SSA40X25S configuration includes a 25 mm stroke (within the 30 mm maximum), a PT1/8 port, a 16 mm rod, and the -S magnet option.
Remember that air pressure extends the rod while the internal spring retracts it, meaning the cylinder cannot hold a mid-stroke load without live pressure. Operating pressure must be at least 0.2 MPa to overcome the spring, and the female M8x1.25 rod-end thread should be aligned to avoid side 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 SSA40X25S FAQ
This single-acting cylinder provides a net push force of 545.6 N at 0.5 MPa and 796.9 N at 0.7 MPa. These values already account for the internal return-spring resistance.
No. Air extends the rod and the spring retracts it, so it cannot hold a mid-stroke load without live pressure. It requires a minimum of 0.2 MPa to overcome the spring, and the -S magnet enables position detection with AirTAC reed or electronic switches.
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