This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X273S, 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 SI100X273S
The AirTAC Airtac SI100 Standard Cylinder SI100X273S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 273mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X273S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke273 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X273S
- 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 SI100X273S
The AirTAC SI100X273S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 273mm stroke. It delivers 3927N push force at 0.5MPa via a G1/2 port. The direct replacement is the SAI100X273S, matching the exact ISO 15552 mounting interface, stroke, and force.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. This -S model uses CS1-B/DS1-B sensors; the SAI uses current switches.
Airtac SI100 Standard Cylinder SI100X273S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X273S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X273S |
| Bore size | Ø100 mm |
| Stroke | 273 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 SAI100X273S 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 SAI100X273S 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 SI100X273S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×273 | 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 SI100X273S Is Used
Heavy Pressing
Applies 3927N of thrust at 0.5MPa for seating bearings or forming light panels in automated machinery.
Product Divert
Actuates heavy lane changers and sorting gates on high-throughput packaging conveyors.
Replacing the Airtac SI100 Standard Cylinder SI100X273S with the SAI100X273S
To replace the SI100X273S, order the SAI100X273S keeping the identical ISO 15552 mounting, 273mm stroke, G1/2 port, and -S magnet. The 273mm stroke is nonstandard, so verify lead times. For sizing, neighboring bores (80mm / 125mm) offer different force classes; at 0.5MPa this 100mm bore gives 3927N push and 3681N pull. If the application requires load holding on air loss, note that a plain cylinder drifts (the cushion only decelerates), so specify an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. For any stroke over 300mm, ensure guide rails to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X273S
- ✓ 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 SI100X273S FAQ
Yes, the SI100X273S is discontinued. The direct replacement is the SAI100X273S. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 273mm stroke, G1/2 port, and mounting interface.
This double-acting cylinder 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 theoretical max of 801kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X273S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X273S replacement — usually within 7-8 hours.