This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX350S, 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 SI100AX350S
The AirTAC Airtac SI100 Standard Cylinder SI100AX350S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 350mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX350S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX350S
- 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 SI100AX350S
The AirTAC SI100AX350S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore, 350mm stroke, and SUS420J2 stainless steel rod. Delivering 3927 N push force at 0.5 MPa via a G1/2 port, it is replaced by the SAI100AX350S. This direct upgrade shares identical ISO 15552 mounting dimensions, stroke, and force, but features an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life.
The -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL, SAIF, and BSAI lock variants. Note that a standard cylinder drifts on air loss; the cushion only decelerates, so use an external rod lock for holding.
Airtac SI100 Standard Cylinder SI100AX350S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX350S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX350S |
| Bore size | Ø100 mm |
| Stroke | 350 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 SAI100AX350S 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 SAI100AX350S 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 SI100AX350S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×350 | 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 SI100AX350S Is Used
Heavy-Duty Pressing
Drives large stamping and forming stations requiring up to 5497 N of thrust at 0.7 MPa, utilizing the 350mm stroke to fully extend and seat heavy tooling.
Pallet Handling
Actuates 200 kg vertical lifts in automated storage systems, relying on the SUS420J2 stainless rod to resist corrosion in humid or washdown environments.
Bulk Material Diversion
Pushes heavy product loads across high-speed transfer lines, where the 100mm bore provides the necessary force to move goods without stalling.
Replacing the Airtac SI100 Standard Cylinder SI100AX350S with the SAI100AX350S
To replace the SI100AX350S, order the SAI100AX350S, confirming the ISO 15552 interface, 100mm bore, 350mm stroke, G1/2 port, and SUS420J2 stainless rod. The -S magnet means you can use CS1-B/DS1-B switches, though the SAI takes current AirTAC sensors. For sizing, neighbors are 80mm (2513 N @0.5) and 125mm (6136 N @0.5); this 100mm bore yields 3927 N push and 3681 N pull at 0.5 MPa, or 5497 N at 0.7 MPa. At 350mm stroke, use external guides to prevent rod bending under side loads. A plain cylinder does not hold load without air; for secure holding, choose the SAIL or BSAI lock variant, or add a pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX350S
- ✓ 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 SI100AX350S FAQ
Yes, the AirTAC SI100AX350S is discontinued. The direct replacement is the SAI100AX350S. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 350mm stroke, G1/2 port, and mounting interface, but features an upgraded two Y-shaped element piston seal for longer life.
The G1/2 port feeds a 25mm piston rod. 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, with a theoretical max of 801 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX350S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX350S replacement — usually within 7-8 hours.