This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X300STC, 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 SI100 Standard Cylinder SI100X300STC
The AirTAC Airtac SI100 Standard Cylinder SI100X300STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 300mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X300STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke300 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X300STC
- 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 SI100 Standard Cylinder SI100X300STC
The AirTAC SI100X300STC is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore, 300mm stroke, G1/2 port, and TC trunnion mount. Delivering 3927N push force at 0.5MPa, it is replaced by the SAI100X300STC. This direct upgrade keeps the exact ISO 15552 mounting interface, bore, stroke, and output force.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI variants the SI lacked. The -S magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X300STC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X300STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X300STC |
| Bore size | Ø100 mm |
| Stroke | 300 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI100X300STC carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAI100X300STC produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI100 Standard Cylinder SI100X300STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×300 | 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 SI100 Standard Cylinder SI100X300STC Is Used
Heavy Stamping Press
Drives large dies and heavy platens in automated metal forming lines, utilizing the 3927N thrust to shape thick gauge materials reliably.
Bulk Material Diversion
Actuates heavy-duty routing gates on high-throughput packaging conveyors, using the TC trunnion to handle pivoting loads.
Replacing the Airtac SI100 Standard Cylinder SI100X300STC with the SAI100X300STC
To replace the SI100X300STC, order the SAI100X300STC. It drops right into existing fixtures via the ISO 15552 TC trunnion interface, matching the 100mm bore, 300mm stroke, G1/2 port, and M20x1.5 rod thread. If you need less force, the 80mm bore yields 2513N push at 0.5MPa; for more power, the 125mm bore gives 6136N. Because this is a 300mm stroke, use an external guide to prevent rod bending and side-load wear. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding, specify the SAIL or BSAI lock variant, or add an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X300STC
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI100 Standard Cylinder SI100X300STC FAQ
Yes, the AirTAC SI100X300STC is discontinued. The direct replacement is the SAI100X300STC. It shares the identical ISO 15552 mounting interface, 100mm bore, 300mm stroke, output force, G1/2 port, and TC mounting, fitting your existing fixtures perfectly.
The 100mm bore provides 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a theoretical max of 801kgf at 1.0MPa. Operating speed is 30-800mm/s. It uses a G1/2 port, M20x1.5 rod thread, and 36mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X300STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X300STC replacement — usually within 7-8 hours.