This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X1800, 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 SI100X1800
The AirTAC SI100 Standard Cylinder SI100X1800 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 1800mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X1800, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke1800 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X1800
- 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 SI100X1800
The AirTAC SI100X1800 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 1800mm stroke. Generating 3927N push force at 0.5MPa, it is replaced by the SAI100X1800. This direct upgrade keeps the same G1/2 port, M20x1.5 thread, and mounting interface. Note that 1800mm exceeds the 1500mm standard stroke limit, making this a non-standard made-to-order item.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. With no magnet, this SKU cannot take a sensor. For load holding, the cushion only decelerates; use an external rod lock or SAIL/BSAI variant.
Airtac SI100 Standard Cylinder SI100X1800 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X1800 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X1800 |
| Bore size | Ø100 mm |
| Stroke | 1800 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 SAI100X1800 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 SAI100X1800 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 SI100X1800
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×1800 | 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 SI100X1800 Is Used
Long-Stroke Transfer
Pushes heavy pallets 1800mm down an assembly line using 3927N force at 0.5MPa, requiring external guides to prevent rod bending.
Large Press Ejection
Ejects formed parts from a wide press bed, utilizing the 100mm bore's 801kgf max theoretical force at 1.0MPa for stubborn jams.
Replacing the Airtac SI100 Standard Cylinder SI100X1800 with the SAI100X1800
To replace the SI100X1800, order the SAI100X1800, confirming the ISO 15552 interface, 100mm bore, 1800mm stroke, and G1/2 port. Because 1800mm exceeds the 1500mm max standard, it is non-standard and requires external guides to prevent rod bending over this long distance. If sizing down, an 80mm bore yields 2513N at 0.5MPa; sizing up to 125mm provides 6136N. A plain cylinder drifts without air, so for load holding explore the SAIL lock, BSAI clamp-lock, or a pilot check valve. The SAIF variant adds a built-in valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X1800
- ✓ 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 SI100X1800 FAQ
Yes, the SI100X1800 is discontinued. The direct replacement is the SAI100X1800. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 1800mm stroke, G1/2 port, and mounting interface, but adds an upgraded piston seal.
The 100mm bore uses a G1/2 port. It generates 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a max theoretical force of 801kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X1800
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X1800 replacement — usually within 7-8 hours.