This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X450S, 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 SI100X450S
The AirTAC Airtac SI100 Standard Cylinder SI100X450S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 450mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X450S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke450 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X450S
- 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 SI100X450S
The AirTAC SI100X450S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 450mm stroke. It delivers a push force of 3927 N at 0.5 MPa via its G1/2 port. The direct successor is the SAI100X450S, which retains identical mounting, bore, stroke, output force and porting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. For applications needing load holding on air loss, the SAI family adds SAIL and BSAI lock variants the SI lacked.
Airtac SI100 Standard Cylinder SI100X450S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X450S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X450S |
| Bore size | Ø100 mm |
| Stroke | 450 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 SAI100X450S 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 SAI100X450S 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 SI100X450S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×450 | 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 SI100X450S Is Used
Heavy Material Diversion
Drives large profile deflectors or sorting gates on heavy-duty conveyor lines, utilizing the 3927 N push force to reliably pivot fully loaded pallets.
Press Ejection Systems
Ejects heavy finished parts from large stamping presses, using the 36mm adjustable air cushions at both ends to decelerate the 25mm rod smoothly over the long travel.
Replacing the Airtac SI100 Standard Cylinder SI100X450S with the SAI100X450S
To replace the SI100X450S, order the SAI100X450S. Confirm the ISO 15552 mounting interface, the G1/2 port, the M20x1.5 rod thread, and the -S magnet for legacy CS1-B/DS1-B switches (the SAI uses current AirTAC switches). If downsizing, a 80mm bore gives 2513 N push at 0.5 MPa; if upsizing, a 125mm bore yields 6136 N. Because this is a 450mm stroke, use external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss—the cushion only decelerates—so for held loads use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X450S
- ✓ 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 SI100X450S FAQ
Yes, the AirTAC SI100X450S is discontinued. The direct replacement is the SAI100X450S. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 450mm stroke, G1/2 port, and mounting fixtures exactly.
This double-acting cylinder has a G1/2 port and delivers a push force of 3927 N and pull of 3681 N at 0.5 MPa. At 0.7 MPa push is 5497 N, at 0.9 MPa it is 7068 N, and the theoretical max is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X450S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X450S replacement — usually within 7-8 hours.