This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50BX230S, 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 SI50BX230S
The AirTAC Airtac SI50 Standard Cylinder SI50BX230S 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 SAI50BX230S, 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 → SAI50BX230S
- 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 SI50BX230S
The AirTAC SI50BX230S is a discontinued double-acting ISO 15552 profile cylinder featuring a 50mm bore, 230mm stroke, and a SUS304 stainless steel piston rod (B option). Delivering 982 N of push force at 0.5 MPa, it is directly replaced by the SAI50BX230S. This direct upgrade shares the exact ISO 15552 mounting interface, G1/4 port, and M16x1.5 rod thread, fitting existing fixtures perfectly.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The built-in magnet (-S) supports legacy CS1-B/DS1-B sensors, while a Viton H seal option raises operating temperatures to 150 C.
Airtac SI50 Standard Cylinder SI50BX230S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50BX230S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50BX230S |
| 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 SAI50BX230S 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 SAI50BX230S 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 SI50BX230S
| 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 SI50BX230S Is Used
Stainless Rod Diverters
Ideal for food-grade or wash-down conveyor diverters where the SUS304 rod resists corrosion and the 982 N force reliably pushes packages.
Clamping Fixtures
Used on machining clamping fixtures where the 230mm stroke positions parts and the adjustable 30mm air cushions decelerate the load smoothly.
Replacing the Airtac SI50 Standard Cylinder SI50BX230S with the SAI50BX230S
To replace the discontinued SI50BX230S, order the SAI50BX230S. Confirm the ISO 15552 mounting interface, 50mm bore, 230mm stroke, G1/4 port, and your specific mounting accessory (LB, FA, TC, etc.). The -S magnet and -B SUS304 rod are retained. When sizing, note the 50mm bore yields 982 N push at 0.5 MPa; neighboring bores are 40mm (628 N) and 63mm (1559 N). For this 230mm stroke, ensure adequate guide support to prevent rod bending and side loads. A plain cylinder does not hold load without live air; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50BX230S
- ✓ 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 SI50BX230S FAQ
Yes, the SI50BX230S is discontinued. The direct replacement is the SAI50BX230S. It shares the same ISO 15552 mounting interface, 50mm bore, 230mm stroke, force, G1/4 port, and SUS304 rod, fitting existing fixtures perfectly.
The 50mm bore uses a G1/4 port. Force ratings are: 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, 1767 N 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 SAI50BX230S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50BX230S replacement — usually within 7-8 hours.