This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X780S, 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 SI100X780S
The AirTAC Airtac SI100 Standard Cylinder SI100X780S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 780mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X780S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke780 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X780S
- 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 SI100X780S
The AirTAC SI100X780S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 780mm stroke. It delivers 3927N push force at 0.5MPa via a G1/2 port. AirTAC replaced this legacy unit with the SAI100X780S, a direct sharing the exact mounting interface, bore, stroke, output force, and accessories.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. The SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked. Your -S magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X780S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X780S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X780S |
| Bore size | Ø100 mm |
| Stroke | 780 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 SAI100X780S 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 SAI100X780S 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 SI100X780S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×780 | 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 SI100X780S Is Used
Long-Stroke Material Transfer
Drives heavy pallets across 780mm spans where the 3927N thrust at 0.5MPa easily overcomes friction on conveyor lines.
Vertical Press Diving
Pushes tooling down with 5497N at 0.7MPa for light pressing or seating operations, requiring external guides for the long rod.
Replacing the Airtac SI100 Standard Cylinder SI100X780S with the SAI100X780S
To replace the SI100X780S, order the SAI100X780S. Confirm the ISO 15552 mounting interface, 100mm bore, 780mm stroke, G1/2 port (PT/G/NPT), and your mounting accessory. The -S magnet enables CS1-B/DS1-B sensors. If sizing up or down, neighbor bores are 80mm (2513N push @0.5MPa) and 125mm (6136N push @0.5MPa). 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 780mm, prevent rod bending by using external guides to absorb side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X780S
- ✓ 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 SI100X780S FAQ
Yes, the SI100X780S is discontinued. The direct replacement is the SAI100X780S. It shares the same ISO 15552 mounting interface, 100mm bore, 780mm stroke, output force, and G1/2 port, fitting existing fixtures perfectly.
The 100mm bore provides 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a theoretical max of 801kgf at 1.0MPa. Operating speed is 30-800mm/s. It uses a G1/2 port and M20x1.5 rod thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X780S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X780S replacement — usually within 7-8 hours.