This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X100TC, 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.

The AirTAC Airtac SI100 Standard Cylinder SI100X100TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 100mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X100TC, which matches its ISO interface, bore, stroke, force and mounting.
The AirTAC SI100X100TC is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 100mm stroke. It delivers 3927 N push force at 0.5 MPa via a G1/2 port. The direct replacement is the SAI100X100TC, which shares the exact TC trunnion mounting and dimensions.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. This SKU lacks a magnet, so it cannot take a sensor. For high heat, Viton H seals raise the limit to 150 C.
| Model | Airtac SI100 Standard Cylinder SI100X100TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X100TC |
| Bore size | Ø100 mm |
| Stroke | 100 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 SAI100X100TC carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAI100X100TC produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×100 | 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).
Generates 3927 N of push force at 0.5 MPa to secure large metal castings during machining operations.
Uses the 100mm stroke and TC trunnion mount to push heavy pallets onto secondary packaging lines.
Provides reliable vertical actuation for industrial loading dock gates requiring robust force.
To replace the SI100X100TC, order the SAI100X100TC. Verify the ISO 15552 TC trunnion mount, 100mm stroke, G1/2 port, and M20x1.5 rod thread. Because this SKU has no -S magnet, it cannot accept CS1-B/DS1-B sensors. Sizing down, an 80mm bore yields 2513 N push at 0.5 MPa; sizing up, a 125mm bore gives 6136 N. Note that a plain cylinder drifts without air; for load holding, use the SAIL or BSAI lock variant.
Replacement checklist
Yes, the SI100X100TC is discontinued. The direct replacement is the SAI100X100TC. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 100mm stroke, G1/2 port, TC mount, and force ratings.
The bore is 100mm with a G1/2 port. Force output is 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N push at 0.9 MPa, and a maximum theoretical force of 801 kgf at 1.0 MPa.
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X100TC replacement — usually within 7-8 hours.