This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X300FA, 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 SI100X300FA
The AirTAC Airtac SI100 Standard Cylinder SI100X300FA 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 SAI100X300FA, 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 → SAI100X300FA
- 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 SI100X300FA
The AirTAC SI100X300FA is a discontinued double-acting ISO 15552 profile cylinder featuring an extruded aluminum barrel and an FA flange mount. Built for heavy-duty motion, it delivers 3927 N push and 3681 N pull at 0.5 MPa, operating through a G1/2 port with a 25 mm rod. AirTAC replaced this legacy unit with the SAI100X300FA, a direct replacement matching the exact ISO 15552 mounting interface, 300 mm stroke, force class, and flange hardware.
The SAI upgrade introduces a refined piston seal utilizing two Y-shaped one-way elements for low start-up pressure and extended service life. This SKU lacks the -S magnet suffix and therefore cannot accept a position sensor. The SAI family also expands functionality with SAIL, SAIF, and BSAI lock variants absent from the original SI line.
Airtac SI100 Standard Cylinder SI100X300FA Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X300FA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X300FA |
| 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 SAI100X300FA 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 SAI100X300FA 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 SI100X300FA
| 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 SI100X300FA Is Used
Heavy Press Clamping
Secures large steel plates in machining centers using the 3927 N push force at 0.5 MPa, leveraging the rigid FA flange mount to withstand high impact loads.
Pallet Lift Gates
Actuates heavy-duty loading dock gates. With a safe vertical lift capacity around 200 kg, it handles robust pallet stops smoothly via adjustable 36 mm cushions.
Material Forming Stops
Functions as a heavy stroking stop in automated forming lines, utilizing the 300 mm travel to position bulky workpieces before the hydraulic press cycles.
Replacing the Airtac SI100 Standard Cylinder SI100X300FA with the SAI100X300FA
To replace the SI100X300FA, order the SAI100X300FA. Confirm the ISO 15552 FA flange interface, 100 mm bore, 300 mm stroke, G1/2 port (PT/G/NPT thread options), and 25 mm carbon steel rod. Because this is a no-S SKU, it cannot support legacy CS1-B/DS1-B sensors; choose an SAI-S variant if sensing is required. Sizing both ways: stepping down to an 80 mm bore yields 2513 N push @0.5 MPa, while a 125 mm bore provides 6136 N. At 300 mm stroke, prevent rod bending by guiding the load externally to avoid side-load forces. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X300FA
- ✓ 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 SI100X300FA FAQ
Yes, the SI100X300FA is discontinued. The direct replacement is the SAI100X300FA. It matches the ISO 15552 mounting interface, 100 mm bore, 300 mm stroke, G1/2 port, and FA flange, fitting existing fixtures perfectly while upgrading the piston seal.
It features a G1/2 port and 25 mm rod. 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 maximum of 801 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X300FA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X300FA replacement — usually within 7-8 hours.