Airtac SSA Single-Acting Compact Cylinder SSA20X15S
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA20X15S is a genuine single-acting COMPACT cylinder (single acting, push type) with a Ø20mm bore and 15mm 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.
- BoreØ20 mm
- Stroke15 mm
- Port sizeM5×0.8
- Acting typeSingle acting, push type
- Rod threadM4×0.7 (F) / M6×1.0 (B)
- CushionFixed NBR bumper
About the Airtac SSA Single-Acting Compact Cylinder SSA20X15S
The AirTAC SSA20X15S is a compact single-acting push-type cylinder where air pressure extends the rod and an internal spring retracts it. It provides 134.1 N of net push at 0.5 MPa, meaning the return spring force is already subtracted from the raw air force. The short riveted body saves axial mounting depth where a longer profile unit will not fit.
This 20 mm bore model requires only one air line and one solenoid port to drive the motion, simplifying plumbing and reducing valve costs. It carries a built-in piston magnet for AirTAC reed or electronic switches, and uses a fixed NBR bumper to decelerate the stroke end rather than an adjustable air cushion.
Airtac SSA Single-Acting Compact Cylinder SSA20X15S Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA20X15S |
|---|---|
| Series | SSA compact single-acting cylinder |
| Bore size | Ø20 mm |
| Stroke | 15 mm |
| Acting type | Single acting, push type |
| Port size | M5×0.8 |
| Rod end thread | M4×0.7 female / M6×1.0 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 (Ø20mm, Push)
| Pressure | Push force (net) |
|---|---|
| 0.5 MPa | 134 N |
| 0.7 MPa | 197 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 SSA20X15S
| SSA | Compact single acting, push type cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×15 | 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 SSA20X15S Is Used
Short-Stroke Part Clamping
Uses the 134.1 N net extension force to hold light machined components firmly against a stop during drilling or milling operations.
Package Diverter Ejector
Spring-return action automatically withdraws the 8 mm rod when air is cut, safely clearing the path for downstream conveyor items.
PCB Fixture Actuation
The compact riveted body fits into dense electronics assembly jigs, extending 15 mm to push delicate boards into test connectors.
Is the Airtac SSA Single-Acting Compact Cylinder SSA20X15S the Right Cylinder?
When sizing this 20 mm bore unit, consider the neighboring bores: the smaller SSA16 yields 80.5 N net push at 0.5 MPa, while the larger SSA25 provides 216.9 N. The 134.1 N output at 0.5 MPa gives a safe working load of roughly 80 N, or a vertical lift of about 6.8 kg with a 2:1 margin. Operating pressure must be at least 0.2 MPa to overcome the return spring.
This configuration has a 15 mm stroke (respecting the 30 mm maximum), an 8 mm rod, and an M5x0.8 port. Because air loss lets the spring drive the rod to its retracted rest position, it cannot hold a mid-stroke load without an external rod lock. The -S magnet code is present, and the rod-end thread is female M4x0.7.
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 SSA20X15S FAQ
The net push force is 134.1 N at 0.5 MPa and 196.9 N at 0.7 MPa. These figures already account for the internal return spring resistance, giving you the true usable output for your design calculations.
No. It is a single-acting push type where the internal spring retracts the rod when air is released. It requires at least 0.2 MPa to overcome the spring, and on air loss it returns to its retracted state rather than locking mid-stroke.
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