Airtac SSA Single-Acting Compact Cylinder SSA50X20SB
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA50X20SB is a genuine single-acting COMPACT cylinder (single acting, push type) with a Ø50mm 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.
- BoreØ50 mm
- Stroke20 mm
- Port sizePT1/4
- Acting typeSingle acting, push type
- Rod threadM10×1.5 (F) / M18×1.5 (B)
- CushionFixed NBR bumper
About the Airtac SSA Single-Acting Compact Cylinder SSA50X20SB
The AirTAC SSA50X20SB is a 50 mm bore compact single-acting push-type cylinder. Compressed air extends the rod, while an internal mechanical spring handles the retraction, meaning you only need one air line and one solenoid port to drive the motion. It yields 874.7 N of net push at 0.5 MPa (1267.4 N at 0.7 MPa), with the return spring force already subtracted from that figure.
This specific configuration includes a built-in piston magnet for position sensing alongside a male M18x1.5 threaded rod end. The short riveted body conserves axial mounting depth in crowded machinery, and a fixed NBR bumper decelerates the piston at the stroke extremes rather than relying on an adjustable air cushion.
Airtac SSA Single-Acting Compact Cylinder SSA50X20SB Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA50X20SB |
|---|---|
| Series | SSA compact single-acting cylinder |
| Bore size | Ø50 mm |
| Stroke | 20 mm |
| Acting type | Single acting, push type |
| Port size | PT1/4 |
| Rod end thread | M10×1.5 female / M18×1.5 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 (Ø50mm, Push)
| Pressure | Push force (net) |
|---|---|
| 0.5 MPa | 875 N |
| 0.7 MPa | 1267 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 SSA50X20SB
| SSA | Compact single acting, push type cylinder series. |
|---|---|
| 50 | 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 SSA50X20SB Is Used
Heavy-Duty Stamping Ejector
Uses the 874.7 N net push force to eject thick steel blanks from a press die, relying on the spring return to reset the pin instantly when air is cut.
Pallet Brake Caliper
Pushes a friction block against heavy pallet skids on an assembly line, using the male M18x1.5 rod to thread directly into the brake shoe for secure mounting.
Multi-Part Clamping Fixture
Secures multiple aluminum castings simultaneously in a tight machining cell where the short riveted body prevents interference with the spindle.
Is the Airtac SSA Single-Acting Compact Cylinder SSA50X20SB the Right Cylinder?
When sizing this unit, compare its 874.7 N net output at 0.5 MPa against adjacent bores: the SSA40 provides 545.6 N, while the SSA63 offers 1382.6 N. A practical safe working load is roughly 525 N (about 60 percent of the 0.5 MPa figure), allowing a vertical lift of approximately 44.6 kg with a 2:1 safety margin. The standard stroke ceiling for this series is 30 mm, and this 20 mm travel unit fits well within that limit.
Confirm the 50 mm bore, 20 mm stroke, and PT1/4 port match your manifold setup. Because it carries the S and B option codes, this variant features a male M18x1.5 piston rod and a magnet compatible with AirTAC reed or electronic switches. Remember that the spring drives the rod back to rest upon air loss; it will not hold a mid-stroke load without live pressure or an external locking device.
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 SSA50X20SB FAQ
The net push force is 874.7 N at 0.5 MPa and 1267.4 N at 0.7 MPa. These values already account for the internal return spring resistance, giving you the true usable output for your design calculations.
No. When air pressure drops below the 0.2 MPa minimum required to overcome the spring, the internal spring drives the rod back to its fully retracted rest position. It cannot lock or hold a load mid-stroke without live air pressure or an external rod lock.
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