This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X195SN, 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 SI50X195SN
The AirTAC SI50 Standard Cylinder SI50X195SN 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 SAI50X195SN, 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 → SAI50X195SN
- 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 SI50X195SN
The AirTAC SI50X195SN is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore and 195 mm stroke. It delivers 982 N push force at 0.5 MPa via a G1/4 port. The direct replacement is the SAI50X195SN, matching the bore, stroke, force, and ISO 15552 mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI variants the SI lacked. The NBR seal suits -20 to +70 C, and the magnet works with CS1-B/DS1-B switches.
Airtac SI50 Standard Cylinder SI50X195SN Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X195SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X195SN |
| 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 SAI50X195SN 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 SAI50X195SN 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 SI50X195SN
| 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 SI50X195SN Is Used
Package Diversion
Actuates routing gates on packaging lines where a 982 N push force at 0.5 MPa easily handles standard carton weights.
Replacing the Airtac SI50 Standard Cylinder SI50X195SN with the SAI50X195SN
To replace the SI50X195SN, order the SAI50X195SN. It drops into existing fixtures using the same ISO 15552 mounting interface, 50 mm bore, 195 mm stroke, and G1/4 port. Confirm your mounting accessory (LB, FA, TC, etc.) and the magnet requirement. The -S magnet supports CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches. The -N NBR seal handles -20 to +70 C; choose Viton H for up to 150 C. Neighbouring bores: a 40 mm gives 628 N, while a 63 mm gives 1559 N. A plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Rod material options include carbon steel, SUS420J2, or SUS304.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X195SN
- ✓ 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 SI50X195SN FAQ
Yes, the SI50X195SN is discontinued. The direct replacement is the SAI50X195SN. It features the same ISO 15552 mounting interface, 50 mm bore, 195 mm stroke, output force, and G1/4 port, fitting existing fixtures perfectly.
This 50 mm bore cylinder has a G1/4 air port. It delivers 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, and a theoretical maximum of 200 kgf at 1.0 MPa. The piston rod is Ø20 mm with an M16x1.5 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X195SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X195SN replacement — usually within 7-8 hours.