Airtac SSA Single-Acting Compact Cylinder SSA40X20SB
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA40X20SB is a genuine single-acting COMPACT cylinder (single acting, push type) with a Ø40mm bore and 20mm 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
- Stroke20 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 SSA40X20SB
The AirTAC SSA40X20SB is a compact single-acting push-type cylinder where air extends the rod and an internal spring retracts it. It delivers 545.6 N of net push force at 0.5 MPa, making it highly effective for short-stroke clamping tasks. The short riveted body saves axial mounting depth where a larger profile cylinder will not fit.
This specific configuration includes a built-in piston magnet for position sensing alongside a male M14x1.5 threaded rod end. A fixed NBR bumper handles end-of-stroke deceleration, and the single-line plumbing requirement simplifies your valve and fitting layout.
Airtac SSA Single-Acting Compact Cylinder SSA40X20SB Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA40X20SB |
|---|---|
| Series | SSA compact single-acting cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 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 SSA40X20SB
| SSA | Compact single acting, push type cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 SSA40X20SB Is Used
Stamping Pin Ejection
Uses the 545.6 N net extension force to push formed pins out of a die, relying on the spring to retract the rod quickly for the next cycle.
Pallet Component Clamping
Secures wooden blocks during nailing with its 16 mm rod, saving axial depth in tight automated pallet assembly lines.
Carton Flap Folding
Extends to fold heavy corrugated flaps prior to taping, with the fixed NBR bumper absorbing the impact at the end of the stroke.
Is the Airtac SSA Single-Acting Compact Cylinder SSA40X20SB the Right Cylinder?
When sizing this model, note that the SSA32 bore provides 346.6 N at 0.5 MPa, while stepping up to the SSA50 yields 874.7 N at 0.5 MPa. The quoted force is already net of the return spring, giving you a real design figure. A practical safe working load is roughly 327 N, which allows a vertical lift of about 27.8 kg with a 2:1 safety margin.
This 40 mm bore unit has a 20 mm stroke, well within the 30 mm series ceiling. It requires 0.2 to 1.0 MPa operating pressure to overcome the spring. Because air loss causes the spring to drive the rod to its retracted rest position, it cannot hold a mid-stroke load without an external device. Configuration confirmed: PT1/8 port, male M14x1.5 rod, and an S magnet for reed or electronic switches.
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 SSA40X20SB FAQ
This single-acting push cylinder provides 545.6 N of net extension force at 0.5 MPa and 796.9 N at 0.7 MPa. These figures already account for the internal return spring resistance.
No. If air is removed, the internal spring drives the rod back to its retracted position. It cannot lock or hold a load mid-stroke; an external rod lock or a double-acting SDA cylinder is required for that function.
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