This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X570S, 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 SI50X570S
The AirTAC Airtac SI50 Standard Cylinder SI50X570S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 570mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X570S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke570 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X570S
- 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 SI50X570S
The AirTAC SI50X570S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 570mm stroke. It delivers 982N push force at 0.5MPa via a G1/4 port. AirTAC replaced this legacy unit with the SAI50X570S, a direct replacement sharing the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI upgrade features a modernized piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors, and Viton H seals are available for high-temperature environments.
Airtac SI50 Standard Cylinder SI50X570S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X570S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X570S |
| Bore size | Ø50 mm |
| Stroke | 570 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 SAI50X570S 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 SAI50X570S 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 SI50X570S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×570 | 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 SI50X570S Is Used
Long-Stroke Diversion
Ideal for pushing packages across a 570mm lane on a sorting line, utilizing the 982N push force to deflect heavy cartons reliably at 0.5 MPa.
Press Ejection
Ejects formed parts from a press bed over a 570mm distance, where the adjustable 30mm air cushions decelerate the rod smoothly at stroke end.
Replacing the Airtac SI50 Standard Cylinder SI50X570S with the SAI50X570S
To replace the SI50X570S, order the SAI50X570S. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the G1/4 port thread (PT/G/NPT), and the M16x1.5 rod-end thread. The -S magnet equates to current AirTAC switches on the SAI. For sizing, the 50mm bore yields 982N push at 0.5MPa; dropping to a 40mm bore reduces this to 628N, while a 63mm bore increases it to 1559N. Because the 570mm stroke is long, use external guides to prevent rod bending and side-load damage. A plain cylinder does not hold load without live air—the cushion only decelerates—so for load holding, specify the SAIL lock, BSAI clamp-lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X570S
- ✓ 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 SI50X570S FAQ
Yes, the SI50X570S is discontinued. The direct replacement is the SAI50X570S. It shares the identical ISO 15552 mounting interface, 50mm bore, 570mm stroke, output force, and G1/4 port, fitting directly into existing fixtures.
The 50mm bore features a G1/4 air port and an M16x1.5 rod thread. It generates 982N push and 825N pull at 0.5 MPa, 1374N push at 0.7 MPa, 1767N push at 0.9 MPa, and a theoretical maximum of 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X570S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X570S replacement — usually within 7-8 hours.