This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X300S, 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 SI100X300S
The AirTAC Airtac SI100 Standard Cylinder SI100X300S 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 SAI100X300S, 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 → SAI100X300S
- 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 SI100X300S
The AirTAC SI100X300S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 300mm stroke. Delivering 3927N push force at 0.5MPa via a G1/2 port, it is replaced by the SAI100X300S. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke, force, port and accessories.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF and BSAI lock variants. Your -S magnet works with legacy CS1-B/DS1-B sensors; the SAI uses current AirTAC switches.
Airtac SI100 Standard Cylinder SI100X300S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X300S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X300S |
| 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 SAI100X300S 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 SAI100X300S 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 SI100X300S
| 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 SI100X300S Is Used
Heavy Press Clamping
Secures large metal workpieces in machining fixtures, utilizing the 3927N push force at 0.5MPa to hold components rigidly against cutting loads.
Automated Assembly Press
Drives bearings or pins into heavy housings on an automated line, relying on the 300mm stroke and adjustable 36mm air cushions to absorb impact.
Replacing the Airtac SI100 Standard Cylinder SI100X300S with the SAI100X300S
To replace the SI100X300S, order the SAI100X300S. Confirm the ISO 15552 mounting interface, G1/2 port, M20x1.5 rod thread, and mounting accessory (LB, FA, CA, TC). The -S magnet enables CS1-B/DS1-B sensors. For sizing, neighboring bores offer different forces: an 80mm bore yields 2513N [email protected], while a 125mm yields 6136N. At 0.7MPa this 100mm bore pushes 5497N. A plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. At 300mm stroke, prevent rod bending by using external guides to manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X300S
- ✓ 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 SI100X300S FAQ
Yes, the SI100X300S is discontinued. The direct replacement is the SAI100X300S. It features the same ISO 15552 mounting interface, 100mm bore, 300mm stroke, output force, G1/2 port, and mounting accessories, fitting existing fixtures perfectly.
The G1/2 port is fixed by the 100mm bore. Force ratings are: 3927N push and 3681N pull at 0.5MPa; 5497N push at 0.7MPa; 7068N push at 0.9MPa; with a theoretical max of 801kgf at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X300S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X300S replacement — usually within 7-8 hours.