This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X193S, 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 SI50X193S
The AirTAC Airtac SI50 Standard Cylinder SI50X193S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 193mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X193S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke193 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X193S
- 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 SI50X193S
The AirTAC SI50X193S is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore and 193 mm stroke. Delivering 982 N push force at 0.5 MPa, it features a G1/4 port and a built-in piston magnet for CS1-B/DS1-B sensors. AirTAC replaced this EOL unit with the SAI50X193S, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, stroke, output force and port size.
The SAI replacement introduces an upgraded piston seal using two Y-shaped one-way elements for lower start-up pressure and longer life. If you need load holding on air loss, the SAI family adds the SAIL air-released lock and BSAI clamp-lock variants, as the standard cushion only decelerates.
Airtac SI50 Standard Cylinder SI50X193S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X193S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X193S |
| Bore size | Ø50 mm |
| Stroke | 193 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 SAI50X193S 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 SAI50X193S 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 SI50X193S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×193 | 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 SI50X193S Is Used
Package Diversion
Pushes medium-weight cartons off a main conveyor line with 982 N of thrust at 0.5 MPa.
Clamp Actuation
Secures aluminum extrusions during machining operations using a 50 kg vertical clamping force.
Pallet Stopper
Halts pallets at a workstation using the 193 mm stroke and adjustable end cushions.
Replacing the Airtac SI50 Standard Cylinder SI50X193S with the SAI50X193S
To replace the SI50X193S, order the SAI50X193S. Confirm the ISO 15552 mounting interface (LB, FA, TC, etc.), the G1/4 port, and the -S magnet for current AirTAC switches. Sizing both ways: the 50 mm bore yields 982 N push at 0.5 MPa; if you need less force, the 40 mm bore offers 628 N, and for more, the 63 mm bore provides 1559 N. Because this is a 193 mm stroke, watch for side loads and guide external rods to prevent bending. A plain cylinder drifts without live air, so for load holding choose the SAIL lock variant or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X193S
- ✓ 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 SI50X193S FAQ
Yes, the SI50X193S is discontinued. The direct replacement is the SAI50X193S. It shares the same ISO 15552 mounting interface, 50 mm bore, 193 mm stroke, output force and G1/4 port, fitting existing fixtures perfectly.
This double-acting cylinder has a G1/4 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X193S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X193S replacement — usually within 7-8 hours.