This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X350S, 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 SI100X350S
The AirTAC Airtac SI100 Standard Cylinder SI100X350S 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 SAI100X350S, 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 → SAI100X350S
- 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 SI100X350S
The AirTAC SI100X350S is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 350 mm stroke. It delivers 3927 N push force at 0.5 MPa via a G1/2 port. The direct replacement is the SAI100X350S, matching the exact bore, stroke, force, port, and ISO 15552 mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. The SAI family adds SAIL lock, SAIF valve, and BSAI clamp variants. Rod options include SUS420J2 or SUS304, and Viton H seals raise heat to 150 C. The -S magnet works with CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X350S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X350S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X350S |
| 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 SAI100X350S 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 SAI100X350S 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 SI100X350S
| 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 SI100X350S Is Used
Heavy Material Transfer
Drives robust pallet stops and heavy-gauge product diverters on high-throughput packaging lines using the 3927 N push force.
Pallet Positioning
Shifts loaded pallets into wrapping or strapping stations, utilizing the 350 mm stroke to clear adjacent machinery safely.
Press Ejection
Ejects dense machined components from heavy-duty fixtures, relying on the 100 mm bore to overcome substantial friction.
Replacing the Airtac SI100 Standard Cylinder SI100X350S with the SAI100X350S
To replace the SI100X350S, order the SAI100X350S. Verify the ISO 15552 mounting interface, 350 mm stroke, G1/2 port (PT/G/NPT threads), and mounting accessory. The -S magnet uses CS1-B/DS1-B switches, while SAI uses current AirTAC switches. Sizing both ways: a 100 mm bore yields 3927 N push at 0.5 MPa, whereas an 80 mm bore yields 2513 N. At 350 mm stroke, use external guides to prevent rod bending and side-load wear. The air cushion only decelerates; it does not hold load on air loss. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X350S
- ✓ 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 SI100X350S FAQ
Yes, the AirTAC SI100X350S is discontinued. The direct replacement is the SAI100X350S. It is dimensionally interchangeable per ISO 15552, retaining the same 100 mm bore, 350 mm stroke, output force, G1/2 port, and mounting interface.
This 100 mm bore cylinder uses a G1/2 air port. The thrust ratings are: 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 maximum force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X350S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X350S replacement — usually within 7-8 hours.