This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX290, 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 SI100BX290
The AirTAC Airtac SI100 Standard Cylinder SI100BX290 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 290mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX290, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke290 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX290
- 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 SI100BX290
The AirTAC SI100BX290 is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore, 290 mm stroke, and a SUS304 stainless steel piston rod. Delivering 3927 N push force at 0.5 MPa via a G1/2 port, it is replaced by the SAI100BX290. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke, force, port, and accessories.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this SKU lacks a magnet so it cannot take a sensor, and the standard cushion only decelerates; it will not hold a load without air.
Airtac SI100 Standard Cylinder SI100BX290 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX290 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX290 |
| Bore size | Ø100 mm |
| Stroke | 290 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 SAI100BX290 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 SAI100BX290 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 SI100BX290
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×290 | 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 SI100BX290 Is Used
Heavy Press Operations
Drives 100 mm bore clamping and pressing fixtures requiring up to 3927 N of thrust at 0.5 MPa.
Stainless Rod Lifts
Ideal for humid or washdown material handling needing the -B SUS304 rod to resist corrosion.
Pallet Diverting
Pushes heavy pallets on packaging lines, using the 36 mm adjustable cushions to brake the load.
Replacing the Airtac SI100 Standard Cylinder SI100BX290 with the SAI100BX290
To replace the SI100BX290, order the SAI100BX290. Verify the ISO 15552 mounting interface, the 100 mm bore, the 290 mm stroke, the G1/2 port (PT/G/NPT thread options), and your mounting accessory. This SKU has a -B SUS304 stainless rod for corrosion resistance but no -S magnet, meaning it cannot accept CS1-B or DS1-B sensors. Sizing both ways: a neighbouring 80 mm bore yields 2513 N push at 0.5 MPa, while a 125 mm bore yields 6136 N. For loads needing holding on air loss, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants. At 290 mm stroke, guide the load to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX290
- ✓ 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 SI100BX290 FAQ
Yes, the SI100BX290 is discontinued. The direct replacement is the SAI100BX290. It shares the same ISO 15552 mounting interface, 100 mm bore, 290 mm stroke, output force, G1/2 port, and SUS304 rod material, fitting directly into existing fixtures.
The 100 mm bore features a G1/2 port and an M20x1.5 rod thread. At 0.5 MPa it provides 3927 N push and 3681 N pull force. At 0.7 MPa push is 5497 N, at 0.9 MPa it is 7068 N, and the theoretical max force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX290
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX290 replacement — usually within 7-8 hours.