This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50BX230, 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 SI50BX230
The AirTAC Airtac SI50 Standard Cylinder SI50BX230 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 SAI50BX230, 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 → SAI50BX230
- 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 SI50BX230
The AirTAC SI50BX230 is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore and 230 mm stroke. Featuring a SUS304 stainless piston rod (-B option) and G1/4 port, it delivers 982 N push force at 0.5 MPa. The direct replacement is the SAI50BX230, which shares the exact ISO 15552 mounting interface, bore, stroke, and porting for seamless fixture integration.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. Note that this specific SKU lacks a magnet, so it cannot accept position sensors.
Airtac SI50 Standard Cylinder SI50BX230 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50BX230 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50BX230 |
| 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 SAI50BX230 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 SAI50BX230 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 SI50BX230
| 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 SI50BX230 Is Used
Product Diversion
Ideal for pushing packages on a conveyor line, utilizing the 982 N push force at 0.5 MPa to reliably redirect items weighing up to 50 kg.
Stainless Rod Duty
The SUS304 piston rod option excels in humid or mildly corrosive manufacturing environments where standard carbon steel rods might degrade.
Replacing the Airtac SI50 Standard Cylinder SI50BX230 with the SAI50BX230
To replace the SI50BX230, order the SAI50BX230. Confirm the ISO 15552 mounting interface, 50 mm bore, 230 mm stroke, G1/4 port, and SUS304 rod. If sizing up or down, neighbouring bores are 40 mm and 63 mm. At 0.5 MPa, the 40 mm yields 628 N push, while the 63 mm provides 1559 N. For loads requiring holding on air loss, a plain cylinder drifts; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. Since the 230 mm stroke exceeds 300 mm, ensure adequate guide support to prevent rod bending and side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50BX230
- ✓ 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 SI50BX230 FAQ
Yes, the SI50BX230 is discontinued. The direct replacement is the SAI50BX230. It is dimensionally interchangeable per ISO 15552, retaining the same 50 mm bore, 230 mm stroke, G1/4 port, and mounting interface.
It features a G1/4 port. The 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 SAI50BX230
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50BX230 replacement — usually within 7-8 hours.