This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X10S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI50 Standard Cylinder SI50X10S
The AirTAC Airtac SI50 Standard Cylinder SI50X10S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 10mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X10S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke10 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X10S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI50 Standard Cylinder SI50X10S
The AirTAC SI50X10S is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore and 10 mm stroke. It delivers 982 N push and 825 N pull at 0.5 MPa through a G1/4 port. AirTAC replaced this legacy unit with the SAI50X10S, a direct upgrade retaining the exact ISO 15552 mounting interface, stroke, force, and port size.
The SAI upgrade features a revised piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SI50X10S includes a magnet for legacy CS1-B/DS1-B sensors, while the SAI family introduces SAIL, SAIF, and BSAI lock variants absent in the SI line.
Airtac SI50 Standard Cylinder SI50X10S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X10S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X10S |
| Bore size | Ø50 mm |
| Stroke | 10 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI50X10S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAI50X10S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI50 Standard Cylinder SI50X10S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×10 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI50 Standard Cylinder SI50X10S Is Used
Short-Stroke Clamping
Ideal for holding light parts in machining fixtures where a 10 mm travel provides rapid actuation without excessive rod overhang.
Ejector Mechanism
Delivers a fast 982 N push at 0.5 MPa to eject small finished components from automated tooling stations.
Gate Diversion
Powers short-stroke diverters on packaging lines, moving light goods between parallel conveyor belts with precise 10 mm movements.
Replacing the Airtac SI50 Standard Cylinder SI50X10S with the SAI50X10S
To replace the SI50X10S, order the SAI50X10S and confirm the ISO 15552 mounting interface, 50 mm bore, 10 mm stroke, G1/4 port (PT/G/NPT), and mounting accessory. The -S denotes a piston magnet for CS1-B/DS1-B switches; the SAI replacement uses current AirTAC switches. For sizing both ways, a 40 mm bore yields 628 N push at 0.5 MPa, while a 63 mm bore yields 1559 N. Note that a plain cylinder drifts without live air, as the cushion only decelerates; for load holding, use an external rod lock or the SAIL/BSAI lock variant. At a 10 mm stroke, side-load risks are minimal, but ensure rigid guidance for heavy loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X10S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI50 Standard Cylinder SI50X10S FAQ
Yes, the SI50X10S is discontinued. The direct replacement is the AirTAC SAI50X10S. It shares the same ISO 15552 mounting interface, 50 mm bore, 10 mm stroke, output force, and G1/4 port, fitting existing fixtures perfectly.
The 50 mm bore uses a G1/4 port and delivers 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, and a theoretical maximum of 200 kgf at 1.0 MPa. It features a 20 mm rod, M16x1.5 thread, and 30 mm cushions.
Request a Quote for the SAI50X10S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X10S replacement — usually within 7-8 hours.