This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50BX195S, 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 SI50BX195S
The AirTAC SI50 Standard Cylinder SI50BX195S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 195mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50BX195S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke195 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50BX195S
- 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 SI50BX195S
The AirTAC SI50BX195S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore, 195mm stroke, and a SUS304 stainless steel rod. It delivers 982N push force at 0.5MPa via a G1/4 port. AirTAC replaced this legacy unit with the SAI50BX195S, a direct upgrade retaining the exact ISO 15552 mounting interface, stroke, and output force.
The SAI successor features an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. The SI50BX195S includes a piston magnet for legacy CS1-B/DS1-B sensors; note that 195mm is a nonstandard stroke length.
Airtac SI50 Standard Cylinder SI50BX195S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50BX195S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50BX195S |
| Bore size | Ø50 mm |
| Stroke | 195 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 SAI50BX195S 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 SAI50BX195S 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 SI50BX195S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×195 | 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 SI50BX195S Is Used
Stainless Rod Clamping
Ideal for packaging lines where the SUS304 rod resists washdown corrosion while providing 982N of clamping thrust.
195mm Diverter Stroke
The specific 195mm nonstandard stroke handles precise diverting of medium-weight goods on 50mm bore actuators.
Replacing the Airtac SI50 Standard Cylinder SI50BX195S with the SAI50BX195S
To replace the SI50BX195S, order the SAI50BX195S. Verify your ISO 15552 mounting fixtures (LB, FA, TC, etc.), the G1/4 port thread, and the M16x1.5 rod end. The -B suffix indicates a SUS304 stainless rod for corrosion resistance, and the -S denotes the magnet for CS1-B/DS1-B switches. Because 195mm is nonstandard, ensure the SAI custom stroke matches your exact stroke requirement. If sizing up or down, neighbouring bores are 40mm (528N pull) and 63mm (1402N pull) at 0.5MPa. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for held loads. For stroke lengths under 300mm, side-load risks are minimal, but always guide the load to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50BX195S
- ✓ 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 SI50BX195S FAQ
Yes, the SI50BX195S is discontinued. The direct replacement is the SAI50BX195S. It is dimensionally interchangeable per ISO 15552, keeping the same 50mm bore, 195mm stroke, force, G1/4 port, and mounting accessories.
The bore is 50mm with a G1/4 air port. Theoretical forces are: 982N push and 825N pull at 0.5MPa; 1374N push at 0.7MPa; 1767N push at 0.9MPa; and a maximum force of 200kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50BX195S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50BX195S replacement — usually within 7-8 hours.