This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX900S, 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 SI100BX900S
The AirTAC Airtac SI100 Standard Cylinder SI100BX900S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 900mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX900S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke900 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX900S
- 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 SI100BX900S
The AirTAC SI100BX900S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore, 900mm stroke, and a SUS304 stainless steel rod. Delivering a push force of 3927 N at 0.5 MPa, it is replaced by the SAI100BX900S. This direct upgrade matches the G1/2 port, M20x1.5 thread, and ISO 15552 mounting interface.
The SAI features an upgraded piston seal with two Y-shaped elements for low start-up pressure and long life. The built-in magnet works with legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL lock and BSAI clamp variants.
Airtac SI100 Standard Cylinder SI100BX900S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX900S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX900S |
| Bore size | Ø100 mm |
| Stroke | 900 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 SAI100BX900S 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 SAI100BX900S 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 SI100BX900S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×900 | 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 SI100BX900S Is Used
Long-Stroke Press Clamping
Secures large fabrication panels across a 900mm gap, using the 3927 N push force to hold workpieces flat during heavy machining operations.
Pallet Pusher Assembly
Indexes heavy unit loads along conveyor lines, relying on the 100mm bore and G1/2 port to maintain steady 30-800 mm/s actuation speeds.
Stainless Rod Ejector
Ejects manufactured parts in humid wash-down zones, utilizing the SUS304 rod option to prevent corrosion over the extended 900mm travel.
Replacing the Airtac SI100 Standard Cylinder SI100BX900S with the SAI100BX900S
To replace the SI100BX900S, order the SAI100BX900S. Verify the ISO 15552 mounting interface, 100mm bore, 900mm stroke, G1/2 port, and SUS304 rod. If downsizing, an 80mm bore yields 2513 N push at 0.5 MPa; if upsizing, a 125mm bore yields 6136 N. For this 900mm stroke, use external guides to prevent rod bending and side-load wear. The cushion only decelerates; it does not hold load. For load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX900S
- ✓ 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 SI100BX900S FAQ
Yes, the SI100BX900S is discontinued. The direct replacement is the SAI100BX900S. It shares the same ISO 15552 mounting interface, 100mm bore, 900mm stroke, output force, and G1/2 port, fitting existing fixtures perfectly.
This double-acting cylinder uses a G1/2 air port. At 0.5 MPa it provides 3927 N push and 3681 N pull force. At 0.7 MPa push is 5497 N, and at 0.9 MPa it is 7068 N. The theoretical maximum force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX900S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX900S replacement — usually within 7-8 hours.