This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X50FA, 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 SI100X50FA
The AirTAC Airtac SI100 Standard Cylinder SI100X50FA 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 SAI100X50FA, 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 → SAI100X50FA
- 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 SI100X50FA
The AirTAC SI100X50FA is a discontinued double-acting ISO 15552 profile cylinder with an FA flange mount. Delivering 3927 N push at 0.5 MPa, it features a 25 mm rod, M20x1.5 thread, and a G1/2 port. The direct replacement is the SAI100X50FA, matching the exact bore, stroke, force, and ISO 15552 mounting interface.
This SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. Note this non-magnet SKU cannot accept a sensor; legacy CS1-B/DS1-B switches only fit the -S version.
Airtac SI100 Standard Cylinder SI100X50FA Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X50FA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X50FA |
| 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 SAI100X50FA 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 SAI100X50FA 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 SI100X50FA
| 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 SI100X50FA Is Used
Heavy Press Clamping
Applies the 5497 N push force at 0.7 MPa to secure heavy steel plates during machining operations.
Pallet Diverter
Uses the short 50 mm stroke and FA flange to push loaded pallets onto parallel packaging lines.
Replacing the Airtac SI100 Standard Cylinder SI100X50FA with the SAI100X50FA
To replace the SI100X50FA, order the SAI100X50FA and verify the FA flange interface, 100 mm bore, 50 mm stroke, and G1/2 port. Because this SKU lacks the -S magnet, it cannot support position sensing. If sizing alternatives, the 80 mm bore yields 2513 N push while the 125 mm yields 6136 N at 0.5 MPa. Remember the air cushion only decelerates; it does not hold loads. For drop prevention on air loss, use an external pilot check valve or the SAIL/BSAI lock variants. The 50 mm stroke keeps side-load risks minimal.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X50FA
- ✓ 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 SI100X50FA FAQ
Yes, the SI100X50FA is discontinued. The direct replacement is the SAI100X50FA. It is dimensionally interchangeable per the ISO 15552 mounting interface, maintaining the same 100 mm bore, 50 mm stroke, force, G1/2 port, and FA flange.
The G1/2 port bore delivers a push of 3927 N and pull of 3681 N at 0.5 MPa. At 0.7 MPa push is 5497 N, and 7068 N at 0.9 MPa. The theoretical maximum force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X50FA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X50FA replacement — usually within 7-8 hours.