This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X450SFTC, 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 SI100X450SFTC
The AirTAC Airtac SI100 Standard Cylinder SI100X450SFTC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 450mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X450SFTC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke450 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X450SFTC
- 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 SI100X450SFTC
The AirTAC SI100X450SFTC is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 450mm stroke. It delivers 3927 N push force at 0.5 MPa via a G1/2 port. The direct replacement is the SAI100X450SFTC, matching the exact bore, stroke, force, port, and FTC trunnion mount interface.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also adds SAIL and BSAI lock variants absent in the SI line.
Airtac SI100 Standard Cylinder SI100X450SFTC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X450SFTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X450SFTC |
| Bore size | Ø100 mm |
| Stroke | 450 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 SAI100X450SFTC 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 SAI100X450SFTC 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 SI100X450SFTC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×450 | 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 SI100X450SFTC Is Used
Heavy Press Clamping
Secures large steel plates in a machining center, utilizing the 3927 N push force at 0.5 MPa to hold components firmly during milling operations.
Pallet Lift Gates
Actuates heavy loading dock gates. The 450mm stroke provides the reach needed to clear tall pallets, while the FTC mount handles the pivot stress.
Material Transfer Arms
Drives long horizontal transfer arms moving bulk materials between conveyor lines, requiring the 100mm bore's 801 kgf max theoretical output for heavy payloads.
Replacing the Airtac SI100 Standard Cylinder SI100X450SFTC with the SAI100X450SFTC
To replace the SI100X450SFTC, order the SAI100X450SFTC. Verify the ISO 15552 FTC trunnion mount, 100mm bore, 450mm stroke, G1/2 port, and the -S magnet for CS1-B/DS1-B sensors. If sizing up or down, a 125mm bore yields more force, while an 80mm bore offers 2513 N push at 0.5 MPa. For this 450mm stroke, use an external guide to prevent rod bending and side-load wear. The air cushion only decelerates; it does not hold load. For dead-load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X450SFTC
- ✓ 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 SI100X450SFTC FAQ
Yes, the SI100X450SFTC is discontinued. The direct replacement is the SAI100X450SFTC. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 100mm bore, 450mm stroke, G1/2 port, and FTC mount.
The 100mm bore uses a G1/2 port. Force output is 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. It operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X450SFTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X450SFTC replacement — usually within 7-8 hours.