This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X770S, 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 SI100X770S
The AirTAC Airtac SI100 Standard Cylinder SI100X770S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 770mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X770S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke770 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X770S
- 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 SI100X770S
The AirTAC SI100X770S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 770mm stroke. It delivers a push force of 3927 N at 0.5 MPa through a G1/2 port. AirTAC replaced this legacy unit with the SAI100X770S, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, stroke, output force, and accessories.
The SAI successor features an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also introduces SAIL, SAIF, and BSAI lock variants absent from the SI line. This -S SKU includes a piston magnet for legacy CS1-B/DS1-B sensors, whereas the SAI uses current AirTAC switches.
Airtac SI100 Standard Cylinder SI100X770S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X770S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X770S |
| Bore size | Ø100 mm |
| Stroke | 770 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 SAI100X770S 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 SAI100X770S 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 SI100X770S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×770 | 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 SI100X770S Is Used
Long-Stroke Diverters
Drives heavy package diverters on sorting lines where the 770mm stroke shifts pallets laterally between adjacent conveyors.
Vertical Material Lifts
Lifts approximately 200kg loads vertically between facility levels, relying on the 3927N push force at 0.5MPa operating pressure.
Large Press Ejection
Ejects formed parts from large industrial presses, utilizing the full 770mm travel to clear deep mold cavities safely.
Replacing the Airtac SI100 Standard Cylinder SI100X770S with the SAI100X770S
To replace the SI100X770S, order the SAI100X770S. Confirm the ISO 15552 mounting interface, 100mm bore, 770mm stroke, G1/2 port (PT/G/NPT threads), and your mounting accessory. The -S magnet equates to legacy CS1-B/DS1-B sensors; the SAI takes current AirTAC switches. Sizing both ways: the neighboring 80mm bore yields 2513 N push at 0.5 MPa, while the 125mm bore yields 6136 N. 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 lock variant. Because 770mm exceeds 300mm, use external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X770S
- ✓ 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 SI100X770S FAQ
Yes, the SI100X770S is discontinued. The direct replacement is the AirTAC SAI100X770S. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 770mm stroke, 3927N force, and G1/2 port.
This double-acting cylinder has a 25mm rod, M20x1.5 rod thread, G1/2 port, 36mm cushions, and operates at 30-800 mm/s. Force ratings are: push 3927 N and pull 3681 N at 0.5 MPa, push 5497 N at 0.7 MPa, push 7068 N at 0.9 MPa, with a theoretical max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X770S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X770S replacement — usually within 7-8 hours.