This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X1275H, 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 SI100X1275H
The AirTAC SI100 Standard Cylinder SI100X1275H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 1275mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X1275H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke1275 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X1275H
- 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 SI100X1275H
The AirTAC SI100X1275H is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 1275mm stroke. Delivering 3927N push force at 0.5MPa, it features a G1/2 port and high-temp Viton H seals (0-150C). The direct replacement is the SAI100X1275H.
This SAI upgrade keeps the exact ISO 15552 mounting interface, bore, stroke, and port. It adds an upgraded piston seal (two Y-shaped elements for low start-up pressure) and introduces SAIL, SAIF, and BSAI lock variants the SI lacked. With no -S magnet, this SKU cannot take a sensor.
Airtac SI100 Standard Cylinder SI100X1275H Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X1275H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X1275H |
| Bore size | Ø100 mm |
| Stroke | 1275 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 SAI100X1275H 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 SAI100X1275H 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 SI100X1275H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×1275 | 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 SI100X1275H Is Used
High-Temp Ejection
Viton H seals withstand 0-150C, making the direct SAI replacement ideal for ejecting hot molded parts from press lines.
Long-Stroke Transfer
The 1275mm stroke pushes heavy pallets between machining stations, guided externally to prevent rod bending.
Replacing the Airtac SI100 Standard Cylinder SI100X1275H with the SAI100X1275H
To replace the SI100X1275H, order the SAI100X1275H. Confirm the ISO 15552 mounting interface, 100mm bore, 1275mm stroke, G1/2 port, and Viton H high-temp seal. Because this SKU lacks the -S magnet, it cannot accept CS1-B/DS1-B sensors. For sizing, neighboring bores offer different forces: an 80mm bore yields 2513N push at 0.5MPa, while a 125mm bore yields 6136N. A plain cylinder drifts on air loss; for load holding use an external pilot check valve or the SAIL/BSAI lock variant. At 1275mm, prevent rod bending by using external guides to avoid side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X1275H
- ✓ 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 SI100X1275H FAQ
Yes, the SI100X1275H is discontinued. The direct replacement is the SAI100X1275H. It shares the same ISO 15552 mounting interface, 100mm bore, 1275mm stroke, output force, and G1/2 port, fitting existing fixtures perfectly.
The G1/2 port bore delivers 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N at 0.9MPa, and a theoretical max of 801kgf at 1.0MPa. Operating pressure is 0.15-1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X1275H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X1275H replacement — usually within 7-8 hours.