This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X100SH, 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 SI50X100SH
The AirTAC Airtac SI50 Standard Cylinder SI50X100SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 100mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X100SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke100 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X100SH
- 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 SI50X100SH
The AirTAC SI50X100SH is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 100mm stroke. It delivers 982N push force at 0.5MPa, features a G1/4 air port, and includes a high-temperature Viton H seal rated for 0 to 150C. The direct replacement is the SAI50X100SH, matching the exact bore, stroke, force, port, and ISO 15552 mounting interface.
The SAI upgrade introduces a two-piece Y-shaped piston seal for low start-up pressure and long life. The original SI-S magnet supports CS1-B/DS1-B sensors, while the SAI family adds SAIL lock, SAIF valve, and BSAI clamp-lock variants previously unavailable.
Airtac SI50 Standard Cylinder SI50X100SH Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X100SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X100SH |
| Bore size | Ø50 mm |
| Stroke | 100 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 SAI50X100SH 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 SAI50X100SH 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 SI50X100SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×100 | 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 SI50X100SH Is Used
Hot-End Part Ejection
Utilizes the 982N push force and Viton H seal to eject molded components near heat sources up to 150C without seal degradation.
High-Temp Diverting
Actuates diverting gates on warm material conveyors, using the 100mm stroke and ISO 15552 profile mounting for straightforward fixture integration.
Replacing the Airtac SI50 Standard Cylinder SI50X100SH with the SAI50X100SH
To replace the SI50X100SH, order the SAI50X100SH. Confirm the ISO 15552 mounting interface, 100mm stroke, G1/4 port, and high-temp Viton H seal. The built-in magnet (-S) works with legacy CS1-B/DS1-B switches, though the SAI uses current AirTAC sensors. For sizing, the 50mm bore yields 982N push at 0.5MPa; dropping to a 40mm bore gives 628N, while a 63mm bore provides 1559N. This plain cylinder does not hold load on air loss—the cushion only decelerates. For secure holding, use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X100SH
- ✓ 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 SI50X100SH FAQ
Yes, the AirTAC SI50X100SH is discontinued. The direct replacement is the SAI50X100SH. It provides identical ISO 15552 mounting interface dimensions, 50mm bore, 100mm stroke, 982N force, G1/4 port, and Viton H high-temperature seal, fitting existing fixtures perfectly.
The 50mm bore features a G1/4 air port and M16x1.5 rod thread. Force output is 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N push at 0.9MPa, and a theoretical maximum of 200kgf at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X100SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X100SH replacement — usually within 7-8 hours.