This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X480S, 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 SI50X480S
The AirTAC Airtac SI50 Standard Cylinder SI50X480S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 480mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X480S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke480 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X480S
- 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 SI50X480S
The AirTAC SI50X480S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 480mm stroke. It delivers a push force of 982 N at 0.5 MPa. AirTAC replaced this legacy unit with the SAI50X480S. This current-production direct maintains the exact same ISO 15552 mounting interface, G1/4 port, M16x1.5 rod thread and output force, 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 SI50X480S includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI family also introduces lock (SAIL) and built-in valve (SAIF) variants the original SI lacked.
Airtac SI50 Standard Cylinder SI50X480S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X480S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X480S |
| Bore size | Ø50 mm |
| Stroke | 480 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 SAI50X480S 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 SAI50X480S 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 SI50X480S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×480 | 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 SI50X480S Is Used
Long-Stroke Diverting
Pushes packages across transfer lanes with a 480mm reach, utilizing the 982 N force at 0.5 MPa to overcome guide friction.
Multi-Station Indexing
Shifts tooling carriages between machining stations on ISO 15552 mounts, requiring external guides for the long stroke.
Replacing the Airtac SI50 Standard Cylinder SI50X480S with the SAI50X480S
To replace the SI50X480S, order the SAI50X480S. Confirm the ISO 15552 mounting interface (LB, FA, TC, etc.), the G1/4 air port, and the -S magnet requirement for switch sensing. When sizing, a 50mm bore gives 982 N push at 0.5 MPa; dropping to a 40mm bore reduces this to 628 N, while a 63mm bore increases it to 1559 N. Because this is a 480mm stroke, prevent rod bending by guiding the load externally to avoid side-load forces. Note that a standard cylinder drifts on air loss—the cushion only decelerates near stroke end. For load holding, use an external pilot check valve or explore the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X480S
- ✓ 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 SI50X480S FAQ
Yes, the SI50X480S is discontinued. The direct replacement is the AirTAC SAI50X480S. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 480mm stroke, G1/4 port, and mounting interface, so it drops directly into existing fixtures.
The 50mm bore features a G1/4 air port and a M16x1.5 rod thread. It delivers a push force of 982 N and a pull force of 825 N at 0.5 MPa. At 0.7 MPa the push force is 1374 N, and at 0.9 MPa it is 1767 N. The theoretical maximum force is 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X480S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X480S replacement — usually within 7-8 hours.