This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50AX230S, 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 SI50AX230S
The AirTAC Airtac SI50 Standard Cylinder SI50AX230S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 230mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50AX230S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke230 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50AX230S
- 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 SI50AX230S
The AirTAC SI50AX230S is a discontinued double-acting ISO 15552 profile cylinder featuring a 50mm bore, 230mm stroke, and a SUS420J2 stainless piston rod. It delivers 982N push force at 0.5MPa via a G1/4 port. AirTAC replaced this legacy unit with the SAI50AX230S, a direct sharing the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The original -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL, SAIF, and BSAI lock variants previously unavailable.
Airtac SI50 Standard Cylinder SI50AX230S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50AX230S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50AX230S |
| Bore size | Ø50 mm |
| Stroke | 230 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 SAI50AX230S 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 SAI50AX230S 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 SI50AX230S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×230 | 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 SI50AX230S Is Used
Stainless Rod Actuation
Leverages the SUS420J2 rod for corrosion-resistant pushing in washdown or mildly chemical manufacturing environments.
Mid-Stroke Diverting
Provides 230mm of travel to push or sort medium-weight packages up to 50kg on material handling lines.
Replacing the Airtac SI50 Standard Cylinder SI50AX230S with the SAI50AX230S
To replace the SI50AX230S, order the SAI50AX230S. Confirm the ISO 15552 interface, 50mm bore, 230mm stroke, G1/4 port, M16x1.5 rod thread, and the -S magnet for current AirTAC switches. The -A rod specifies SUS420J2 stainless steel; default is carbon steel. For sizing, the neighbouring 40mm bore yields 628N push at 0.5MPa, while the 63mm bore yields 1559N. At 230mm stroke, use guide rails to prevent rod bending and side-load wear. A plain cylinder drifts on air loss; for load holding, use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants. Viton H seals raise operating temperature to 150C.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50AX230S
- ✓ 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 SI50AX230S FAQ
Yes, the SI50AX230S is discontinued. The direct replacement is the SAI50AX230S. It shares the identical ISO 15552 mounting interface, 50mm bore, 230mm stroke, G1/4 port, and output force, fitting existing fixtures perfectly.
It features a G1/4 air port. Force ratings are 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N push at 0.9MPa, and a theoretical max of 200kgf at 1.0MPa. The cushion stroke is 30mm.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50AX230S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50AX230S replacement — usually within 7-8 hours.