
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA63X25SB is a genuine single-acting COMPACT cylinder (single acting, push type) with a Ø63mm 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.
The AirTAC SSA63X25SB is a compact single-acting push-type cylinder where air pressure extends the rod and an internal spring retracts it. It delivers a robust 1382.6 N net push at 0.5 MPa, with the return spring force already subtracted from the raw air force. This makes it a real design figure for sizing heavy clamping or ejection tasks.
Designed for tight fixtures, 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 and a male M18x1.5 piston rod thread. A fixed NBR bumper decelerates the stroke end, though it is not an adjustable air cushion or a locking device.
| Model | Airtac SSA Single-Acting Compact Cylinder SSA63X25SB |
|---|---|
| Series | SSA compact single-acting cylinder |
| Bore size | Ø63 mm |
| Stroke | 25 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.
| Pressure | Push force (net) |
|---|---|
| 0.5 MPa | 1383 N |
| 0.7 MPa | 2006 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.
| SSA | Compact single acting, push type cylinder series. |
|---|---|
| 63 | 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).
Uses the 1382.6 N net push to eject thick metal blanks from a press die, saving axial depth in the tooling with its compact riveted body.
Secures heavy cast parts for machining, relying on the male M18x1.5 rod thread for a robust fixture attachment while air holds the clamp extended.
Applies high force to square large palletized loads before stretch wrapping, with the internal spring ensuring the rod retracts when air is released.
When sizing this model, consider the adjacent bore options. Stepping down to the SSA50 yields 874.7 N net push at 0.5 MPa, while this 63 mm bore reaches 1382.6 N at the same pressure. A safe working load is approximately 830 N, which is about 60 percent of the 0.5 MPa figure, allowing a vertical lift of roughly 70.5 kg with a 2:1 margin.
This configuration features a 63 mm bore, a 25 mm stroke (within the 30 mm series ceiling), a PT1/4 port, and the -S magnet for AirTAC reed or electronic switches. The -B option provides a male M18x1.5 rod thread. Remember that on air loss the spring drives the rod to its retracted rest position, meaning it cannot hold a mid-stroke load without external devices.
Quick checklist
The net push force is 1382.6 N at 0.5 MPa and 2006.1 N at 0.7 MPa. These figures already account for the subtraction of the internal return spring force, giving you the actual usable output for your design calculations.
Air pressure extends the rod, while the internal spring retracts it when air is released, requiring a minimum of 0.2 MPa to overcome the spring. The included -S magnet allows position detection using AirTAC reed or electronic switches, but the cylinder will not hold a mid-stroke load on air loss.
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