This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X300SFA, 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 SI100X300SFA
The AirTAC Airtac SI100 Standard Cylinder SI100X300SFA 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 SAI100X300SFA, 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 → SAI100X300SFA
- 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 SI100X300SFA
The AirTAC SI100X300SFA is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore, 300 mm stroke, and an FA flange mounting interface. Delivering a push force of 3927 N at 0.5 MPa through its G1/2 port, it is replaced by the SAI100X300SFA. This direct successor matches the exact bore, stroke, force, and ISO 15552 mounting dimensions.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. Your -S magnet works with legacy CS1-B/DS1-B switches, while the SAI uses current AirTAC sensors.
Airtac SI100 Standard Cylinder SI100X300SFA Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X300SFA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X300SFA |
| 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 SAI100X300SFA 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 SAI100X300SFA 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 SI100X300SFA
| 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 SI100X300SFA Is Used
Heavy Press Clamping
Ideal for applying 3927 N of clamping force at 0.5 MPa to secure heavy fabrication parts during machining or welding operations.
Automated Forming Dies
Drives large forming dies with a 7068 N push at 0.9 MPa, relying on the 36 mm adjustable air cushions to decelerate heavy tooling at stroke end.
Replacing the Airtac SI100 Standard Cylinder SI100X300SFA with the SAI100X300SFA
To replace the SI100X300SFA, order the SAI100X300SFA. Confirm the ISO 15552 FA flange interface, 100 mm bore, 300 mm stroke, G1/2 port (PT/G/NPT thread options), and the -S magnet for position sensing. When sizing, neighboring bores offer different forces: an 80 mm bore yields 2513 N push at 0.5 MPa, while a 125 mm bore yields 6136 N. At 0.7 MPa this 100 mm unit pushes 5497 N. Note that a plain cylinder drifts without live air; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI variants. Because the 300 mm stroke invites rod bending, use external guides to prevent side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X300SFA
- ✓ 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 SI100X300SFA FAQ
Yes, the SI100X300SFA is discontinued. The direct replacement is the SAI100X300SFA. It is dimensionally interchangeable per ISO 15552, matching the 100 mm bore, 300 mm stroke, 3927 N force, G1/2 port, and FA flange mount.
It features a G1/2 port and provides a push force of 3927 N and pull of 3681 N at 0.5 MPa. At 0.7 MPa it pushes 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 SAI100X300SFA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X300SFA replacement — usually within 7-8 hours.