This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X710S, 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 SI50X710S
The AirTAC Airtac SI50 Standard Cylinder SI50X710S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 710mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X710S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke710 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X710S
- 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 SI50X710S
The AirTAC SI50X710S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 710mm stroke. Delivering 982N push force at 0.5MPa through a G1/4 port, it is replaced by the SAI50X710S. This direct upgrade shares the exact ISO 15552 mounting interface, bore, stroke, force, port and mounting accessories, fitting existing fixtures perfectly.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SI50X710S includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI family also introduces SAIL, SAIF, and BSAI lock variants previously unavailable.
Airtac SI50 Standard Cylinder SI50X710S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X710S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X710S |
| Bore size | Ø50 mm |
| Stroke | 710 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 SAI50X710S 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 SAI50X710S 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 SI50X710S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×710 | 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 SI50X710S Is Used
Long-Stroke Diversion
Pushes packages across a transfer line using the full 710mm extension, relying on the 982N force at 0.5MPa to overcome guide friction.
Material Ejection
Ejects molded parts from a press area, utilizing the 30mm adjustable air cushions at both ends to decelerate the 20mm rod smoothly.
Replacing the Airtac SI50 Standard Cylinder SI50X710S with the SAI50X710S
To replace the SI50X710S, order the SAI50X710S. Confirm the ISO 15552 mounting interface, the 50mm bore, 710mm stroke, G1/4 port (PT/G/NPT thread options), and your mounting accessory (LB, FA, FB, CA, CB, TC). The -S suffix indicates a piston magnet for CS1-B/DS1-B switches; the SAI replacement uses current AirTAC switches. If you need more force, the 63mm bore yields 1559N push at 0.5MPa; if less is required, the 40mm bore yields 628N. Note that a plain cylinder drifts without live air and the cushions only decelerate—for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Because the 710mm stroke is long, prevent rod bending by guiding the load externally to avoid side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X710S
- ✓ 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 SI50X710S FAQ
Yes, the SI50X710S is discontinued. The direct replacement is the SAI50X710S. It is dimensionally interchangeable per ISO 15552, matching the 50mm bore, 710mm stroke, 982N force, G1/4 port, and mounting interface. You simply order the SAI equivalent for a seamless fixture fit.
The bore is 50mm with a G1/4 air port. At 0.5MPa it provides 982N push and 825N pull force. At 0.7MPa the push force is 1374N, and at 0.9MPa it is 1767N. The theoretical maximum force is 200kgf at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X710S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X710S replacement — usually within 7-8 hours.