This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX290S, 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 SI100BX290S
The AirTAC Airtac SI100 Standard Cylinder SI100BX290S 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 SAI100BX290S, 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 → SAI100BX290S
- 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 SI100BX290S
The AirTAC SI100BX290S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 290mm stroke. It delivers a push force of 3927N and pull of 3681N at 0.5MPa, operating via a G1/2 port. The direct replacement is the SAI100BX290S, which shares the same ISO 15552 mounting interface, bore, stroke, output force, and accessories. This B-suffix variant features a SUS304 stainless steel piston rod for corrosion resistance, and the built-in magnet (-S) supports legacy CS1-B/DS1-B sensors.
The SAI upgrade introduces a refined piston seal utilizing two Y-shaped one-way elements, ensuring low start-up pressure and extended service life. Note that a standard cylinder does not hold load without live air; the cushion only decelerates. For secure holding, consider the SAIL lock or BSAI clamp-lock variants.
Airtac SI100 Standard Cylinder SI100BX290S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX290S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX290S |
| 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 SAI100BX290S 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 SAI100BX290S 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 SI100BX290S
| 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 SI100BX290S Is Used
Heavy-Duty Pressing
Drives 3927N of thrust at 0.5MPa for seating bearings and assembling large components in automated machinery.
Pallet Diversion
Actuates heavy lane guides and stop gates on packaging lines, utilizing the 290mm stroke to reroute wide loads.
Replacing the Airtac SI100 Standard Cylinder SI100BX290S with the SAI100BX290S
To replace the discontinued SI100BX290S, order the SAI100BX290S. Confirm the ISO 15552 mounting interface, the 100mm bore, 290mm stroke, G1/2 port (PT/G/NPT threads), and your specific mounting accessory. The -S magnet enables position sensing, while the -B rod specifies SUS304 stainless steel. When sizing, neighbouring bores offer different force classes: an 80mm bore provides 2513N push at 0.5MPa, whereas a 125mm bore yields 6136N. Because this 290mm stroke exceeds 300mm? No, but at 290mm you should still evaluate side-load and rod-bending risks, ensuring adequate guide rails to prevent premature seal wear. For load holding on air loss, a plain cylinder drifts; integrate an external pilot check valve or rod lock, or specify the SAIL or BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX290S
- ✓ 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 SI100BX290S FAQ
Yes, the AirTAC SI100BX290S is discontinued. The direct replacement is the SAI100BX290S. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 290mm stroke, G1/2 port, and mounting interface.
This double-acting cylinder has a G1/2 port and generates 3927N push / 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N at 0.9MPa, and a theoretical maximum of 801kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX290S
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