This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX90S, 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 SI100BX90S
The AirTAC Airtac SI100 Standard Cylinder SI100BX90S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 90mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX90S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke90 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX90S
- 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 SI100BX90S
The AirTAC SI100BX90S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 90mm stroke. Delivering 3927 N push at 0.5 MPa through a G1/2 port, it is replaced by the SAI100BX90S. This direct successor shares the exact ISO 15552 mounting interface, stroke, force, and accessories.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. This -B variant has a SUS304 stainless rod, and the -S magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100BX90S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX90S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX90S |
| Bore size | Ø100 mm |
| Stroke | 90 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 SAI100BX90S 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 SAI100BX90S 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 SI100BX90S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×90 | 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 SI100BX90S Is Used
Heavy-Duty Pressing
Applies up to 5497 N at 0.7 MPa for seating bearings or forming light parts, utilizing the SUS304 rod in washdown environments.
Pallet Diversion
Pushes heavy pallets off a main conveyor line with a safe 2356 N working load, relying on the 90mm stroke for compact spacing.
Replacing the Airtac SI100 Standard Cylinder SI100BX90S with the SAI100BX90S
To replace the SI100BX90S, order the SAI100BX90S. Confirm the ISO 15552 mounting interface, 90mm stroke, G1/2 port, and SUS304 rod. The -S magnet enables CS1-B/DS1-B sensors (SAI uses current AirTAC switches). For sizing, the 100mm bore yields 3927 N push at 0.5 MPa; a smaller 80mm bore yields 2513 N. For load holding, note a plain cylinder drifts on air loss—the cushion only decelerates. Use an external rod lock, pilot check valve, or SAIL/BSAI lock variant. For 90mm strokes, side-load is minimal, but always guide the rod to prevent bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX90S
- ✓ 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 SI100BX90S FAQ
Yes, the SI100BX90S is discontinued. The direct replacement is the SAI100BX90S. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 90mm stroke, G1/2 port, and mounting interface.
The G1/2 port feeds the 100mm bore, delivering 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, and a theoretical max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX90S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX90S replacement — usually within 7-8 hours.