This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X245S, 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 SI100X245S
The AirTAC Airtac SI100 Standard Cylinder SI100X245S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 245mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X245S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke245 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X245S
- 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 SI100X245S
The AirTAC SI100X245S is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 245 mm stroke. Delivering 3927 N push force at 0.5 MPa via a G1/2 port, it is replaced by the SAI100X245S. This direct successor shares the exact ISO 15552 mounting interface, bore, stroke, force and port.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It also adds SAIL, SAIF and BSAI variants the SI lacked. Rod options include carbon steel, SUS420J2 or SUS304; Viton H seals raise heat to 150 C.
Airtac SI100 Standard Cylinder SI100X245S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X245S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X245S |
| Bore size | Ø100 mm |
| Stroke | 245 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 SAI100X245S 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 SAI100X245S 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 SI100X245S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×245 | 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 SI100X245S Is Used
Heavy Press Clamping
Secures large metal castings during machining operations, utilizing the 3927 N push force at 0.5 MPa to hold components rigidly against cutting loads.
Bulk Package Divert
Drives large-scale diverter arms on high-throughput packaging lines, moving heavy cartons laterally with a 245 mm stroke and adjustable end cushions.
Replacing the Airtac SI100 Standard Cylinder SI100X245S with the SAI100X245S
To replace the SI100X245S, order the SAI100X245S. Confirm the ISO 15552 mounting interface, 100 mm bore, 245 mm stroke, G1/2 port (PT/G/NPT thread), and your mounting accessory (LB, FA, TC, etc.). The -S suffix means a magnet for CS1-B/DS1-B sensors; the SAI uses current AirTAC switches. Sizing both ways: a neighbouring 80 mm bore gives 2513 N push at 0.5 MPa, while a 125 mm bore yields 6136 N. Note that 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.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X245S
- ✓ 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 SI100X245S FAQ
Yes, the SI100X245S is discontinued. The direct replacement is the SAI100X245S. It is dimensionally interchangeable per ISO 15552, matching the 100 mm bore, 245 mm stroke, 3927 N force, G1/2 port and mounting accessories.
This double-acting cylinder has 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 theoretical max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X245S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X245S replacement — usually within 7-8 hours.