This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X190TC, 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 SI50X190TC
The AirTAC Airtac SI50 Standard Cylinder SI50X190TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 190mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X190TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke190 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X190TC
- 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 SI50X190TC
The AirTAC SI50X190TC is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 190mm stroke. It delivers 982N push force at 0.5MPa through a G1/4 port. The direct replacement is the SAI50X190TC, matching the exact TC trunnion mount, bore, stroke, and output force.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this SKU lacks a magnet (-S), so it cannot accept CS1-B/DS1-B sensors. For high heat, Viton H seals raise the temperature limit to 150C.
Airtac SI50 Standard Cylinder SI50X190TC Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X190TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X190TC |
| Bore size | Ø50 mm |
| Stroke | 190 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 SAI50X190TC 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 SAI50X190TC 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 SI50X190TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×190 | 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 SI50X190TC Is Used
Package Diversion
Actuates a sorting flap on a packaging line, using the 190mm stroke to push cartons firmly onto an adjacent conveyor belt.
Pallet Stop Gate
Controls a pneumatic stop gate on a roller conveyor, holding standard pallets securely in place for wrapping or inspection.
Clamp Actuation
Drives a secondary clamping fixture on a machining center, providing reliable 982N holding force for light milling operations.
Replacing the Airtac SI50 Standard Cylinder SI50X190TC with the SAI50X190TC
To replace the SI50X190TC, order the SAI50X190TC. Confirm the ISO 15552 TC trunnion interface, 50mm bore, 190mm stroke, G1/4 port (PT/G/NPT thread options), and the lack of a magnet. For sizing, a 50mm bore yields 982N push at 0.5MPa; dropping to a 40mm bore gives 628N, while a 63mm bore provides 1559N. Because this plain cylinder drifts on air loss and the cushion only decelerates, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for held loads. At 190mm stroke, rod bending is low, but always guide the load to prevent side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X190TC
- ✓ 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 SI50X190TC FAQ
Yes, the AirTAC SI50X190TC is discontinued. The direct replacement is the SAI50X190TC. It is dimensionally interchangeable per ISO 15552, matching the 50mm bore, 190mm stroke, TC trunnion mount, G1/4 port, and output force.
The G1/4 port feeds a 50mm bore yielding 982N push and 825N pull at 0.5MPa. At 0.7MPa push is 1374N, and the theoretical maximum force is 200kgf at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X190TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X190TC replacement — usually within 7-8 hours.