This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X350SFTC, 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 SI100X350SFTC
The AirTAC Airtac SI100 Standard Cylinder SI100X350SFTC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 350mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X350SFTC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X350SFTC
- 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 SI100X350SFTC
The AirTAC SI100X350SFTC is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore, 350mm stroke, and an FTC trunnion mount. Delivering 3927 N push force at 0.5 MPa, it features a G1/2 port and M20x1.5 rod thread. AirTAC replaced this legacy unit with the SAI100X350SFTC, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI replacement introduces an upgraded piston seal utilizing two Y-shaped one-way elements for low start-up pressure and extended life. It also expands options with SAIL, SAIF, and BSAI lock or valve variants the SI lacked. The built-in magnet supports legacy CS1-B/DS1-B sensors, while a Viton H seal option raises operating temps to 150 C.
Airtac SI100 Standard Cylinder SI100X350SFTC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X350SFTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X350SFTC |
| Bore size | Ø100 mm |
| Stroke | 350 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 SAI100X350SFTC 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 SAI100X350SFTC 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 SI100X350SFTC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×350 | 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 SI100X350SFTC Is Used
Heavy Press Staging
Ideal for positioning heavy metal blanks at press stations, utilizing the 3927 N push force to feed material reliably.
Pallet Diverting
FTC trunnion mounting handles the side loads of large pallet routing gates on high-throughput packaging conveyors.
Vertical Lift Gates
Drives substantial material handling gates, where the 350mm stroke accommodates full opening heights for forklift access.
Replacing the Airtac SI100 Standard Cylinder SI100X350SFTC with the SAI100X350SFTC
To replace the SI100X350SFTC, order the SAI100X350SFTC ensuring the ISO 15552 FTC trunnion interface, 100mm bore, 350mm stroke, G1/2 port, and magnet are retained. When sizing, check neighboring bores: an 80mm bore yields 2513 N push at 0.5 MPa, while a 125mm bore provides 6136 N. For load holding, note that a plain cylinder drifts on air loss as the cushion only decelerates; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Because the 350mm stroke is long, add external guides to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X350SFTC
- ✓ 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 SI100X350SFTC FAQ
Yes, the SI100X350SFTC is discontinued. The direct replacement is the SAI100X350SFTC, which matches the ISO 15552 mounting interface, 100mm bore, 350mm stroke, G1/2 port, and FTC trunnion mount.
It features a G1/2 port and delivers 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N push at 0.9 MPa, and a theoretical max of 801 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X350SFTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X350SFTC replacement — usually within 7-8 hours.