This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X50SFTC, 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 SI100X50SFTC
The AirTAC Airtac SI100 Standard Cylinder SI100X50SFTC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 50mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X50SFTC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke50 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X50SFTC
- 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 SI100X50SFTC
The AirTAC SI100X50SFTC is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 50mm stroke. Delivering 3927 N push force at 0.5 MPa via a G1/2 port, it is replaced by the direct replacement SAI100X50SFTC. This SAI upgrade shares the exact FTC trunnion mounting and dimensions, but introduces an upgraded piston seal featuring two Y-shaped one-way elements for low start-up pressure and long life. The -S magnet enables legacy CS1-B/DS1-B sensors.
You can also specify Viton H seals to raise the operating temperature to 0-150 C, or opt for SUS304 (B) stainless steel rods for corrosive settings.
Airtac SI100 Standard Cylinder SI100X50SFTC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X50SFTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X50SFTC |
| Bore size | Ø100 mm |
| Stroke | 50 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 SAI100X50SFTC 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 SAI100X50SFTC 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 SI100X50SFTC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×50 | 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 SI100X50SFTC Is Used
Heavy-Duty Pressing
Applies 3927 N of thrust at 0.5 MPa for securely seating large bearings and stamping thick gauge metal components.
Pallet Handling
Drives robust FTC trunnion-mounted lifting arms in automated distribution hubs, moving loads safely within a 200 kg vertical capacity.
Mold Clamping
Holds heavy injection molds firmly in place during processing, utilizing the 100mm bore's substantial 801 kgf maximum theoretical force.
Replacing the Airtac SI100 Standard Cylinder SI100X50SFTC with the SAI100X50SFTC
To replace the SI100X50SFTC, order the SAI100X50SFTC to retain the exact ISO 15552 interface, 100mm bore, 50mm stroke, G1/2 port, and FTC trunnion mount. If downsizing, the 80mm bore yields 2513 N push at 0.5 MPa; if upsizing, the 125mm bore provides 6136 N. Remember that a standard cylinder drifts without live air—the cushion only decelerates near stroke end. For load holding, use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants. The SAIF variant (bores 32-100) integrates a 4M valve if you need self-contained control.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X50SFTC
- ✓ 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 SI100X50SFTC FAQ
Yes, the SI100X50SFTC is discontinued. The direct replacement is the SAI100X50SFTC, which maintains the same ISO 15552 mounting interface, 100mm bore, 50mm stroke, G1/2 port, and output force.
It features a G1/2 port and delivers 3927 N push / 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N push at 0.9 MPa, and a maximum theoretical force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X50SFTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X50SFTC replacement — usually within 7-8 hours.