This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X320S, 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 SI100X320S
The AirTAC Airtac SI100 Standard Cylinder SI100X320S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 320mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X320S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke320 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X320S
- 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 SI100X320S
The AirTAC SI100X320S is a discontinued double-acting ISO 15552 profile cylinder. Delivering 3927 N push force at 0.5 MPa through a 100 mm bore and 320 mm stroke, it is replaced by the SAI100X320S. This direct successor shares the exact ISO 15552 mounting interface, G1/2 port, and M20x1.5 rod thread. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life.
Because this is a -S model, it includes a piston magnet for legacy CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). Rod material options include carbon steel, SUS420J2, or SUS304, with Viton H seals available for 0-150 C heat. The plain cylinder does not hold load without live air; the cushion only decelerates. For locking needs, explore the SAIL or BSAI variants.
Airtac SI100 Standard Cylinder SI100X320S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X320S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X320S |
| Bore size | Ø100 mm |
| Stroke | 320 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 SAI100X320S 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 SAI100X320S 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 SI100X320S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×320 | 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 SI100X320S Is Used
Heavy Pressing
Applies the 5497 N push at 0.7 MPa for seating bearings and forming heavy components on automated lines.
Pallet Diverting
Uses the 320 mm stroke to push heavy pallets onto parallel lanes, requiring external guides to absorb side loads.
Replacing the Airtac SI100 Standard Cylinder SI100X320S with the SAI100X320S
To replace the SI100X320S, order the SAI100X320S. Confirm the ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/2 port, and the -S magnet. Sizing both ways: the 100 mm bore yields 3927 N push at 0.5 MPa, while the neighboring 80 mm bore gives 2513 N. For this 320 mm stroke, add external guides to prevent rod bending and side-load wear. Remember, a standard cylinder drifts without air pressure—the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL lock variant. The SAIF variant offers a built-in valve if needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X320S
- ✓ 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 SI100X320S FAQ
Yes, the SI100X320S is discontinued. The direct replacement is the SAI100X320S. It matches the ISO 15552 mounting interface, 100 mm bore, 320 mm stroke, force, and G1/2 port, fitting existing fixtures perfectly.
The G1/2 port bore delivers 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N at 0.9 MPa, and a max of 801 kgf at 1.0 MPa. It operates at 30-800 mm/s with a 36 mm cushion.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X320S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X320S replacement — usually within 7-8 hours.