This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX500S, 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 SI100BX500S
The AirTAC Airtac SI100 Standard Cylinder SI100BX500S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 500mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX500S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke500 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX500S
- 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 SI100BX500S
The AirTAC SI100BX500S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore, 500mm stroke, and a SUS304 stainless steel piston rod. Delivering 3927 N push force at 0.5 MPa, it is directly replaced by the SAI100BX500S. This direct upgrade shares the exact same ISO 15552 mounting interface, G1/2 port, and output force. The SAI features an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life.
The original SI-SKU includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI replacement family uses current AirTAC switches. If your application requires load holding on air loss, note that the standard cushion only decelerates; you will need the SAIL lock or BSAI clamp-lock variant.
Airtac SI100 Standard Cylinder SI100BX500S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX500S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX500S |
| Bore size | Ø100 mm |
| Stroke | 500 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 SAI100BX500S 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 SAI100BX500S 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 SI100BX500S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×500 | 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 SI100BX500S Is Used
Heavy Stamping Press
Drives large platens in metal forming where the 3927 N push force at 0.5 MPa and 500mm travel are required for deep-draw operations.
Bulk Material Divertor
Pushes heavy aggregate or metal components across wide transfer points, utilizing the full 500mm extension and adjustable 36mm end cushions.
Replacing the Airtac SI100 Standard Cylinder SI100BX500S with the SAI100BX500S
To replace the discontinued SI100BX500S, order the SAI100BX500S. Confirm the ISO 15552 mounting interface, the G1/2 port, the M20x1.5 rod thread, and the SUS304 stainless rod option. Retain the -S magnet specification for position sensing. If downsizing, a neighbouring 80mm bore yields 2513 N push at 0.5 MPa; if upsizing, a 125mm bore provides 6136 N. Because this is a 500mm stroke, use external guides to prevent rod bending and side-load damage. For load holding without live air, select the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX500S
- ✓ 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 SI100BX500S FAQ
Yes, the AirTAC SI100BX500S is discontinued. The direct replacement is the SAI100BX500S. It shares the same ISO 15552 mounting interface, 100mm bore, 500mm stroke, G1/2 port, and output force, fitting existing fixtures perfectly.
The air port is G1/2. The force 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 of 801 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX500S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX500S replacement — usually within 7-8 hours.