This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX290S, 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 SI100AX290S
The AirTAC Airtac SI100 Standard Cylinder SI100AX290S 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 SAI100AX290S, 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 → SAI100AX290S
- 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 SI100AX290S
The AirTAC SI100AX290S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore, 290mm non-standard stroke, and SUS420J2 stainless steel rod. Delivering 3927 N push force at 0.5 MPa via a G1/2 port, its direct replacement is the current-production SAI100AX290S. This upgrade retains the exact ISO 15552 mounting interface, bore, stroke, and output force for existing fixtures.
The SAI successor features an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. The -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family introduces lock and valve variants like the SAIL and BSAI that the SI line lacked.
Airtac SI100 Standard Cylinder SI100AX290S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX290S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX290S |
| 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 SAI100AX290S 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 SAI100AX290S 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 SI100AX290S
| 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 SI100AX290S Is Used
Large Press Actuation
Drives heavy pressing assemblies requiring 3927 N of push force at 0.5 MPa, utilizing the robust 100mm bore and stable ISO 15552 profile barrel.
Stainless Rod Tooling
Operates in humid or mildly corrosive environments using the SUS420J2 stainless piston rod, ensuring reliable actuation without surface degradation.
Replacing the Airtac SI100 Standard Cylinder SI100AX290S with the SAI100AX290S
To replace the SI100AX290S, order the SAI100AX290S. Verify the ISO 15552 mounting interface, the 100mm bore, the 290mm non-standard stroke, the G1/2 port (PT/G/NPT), and the SUS420J2 stainless rod (-A). The -S magnet allows CS1-B/DS1-B switches. Sizing both ways: a neighbouring 80mm bore yields 2513 N push at 0.5 MPa, whereas a 125mm bore yields 6136 N. Because the 290mm stroke exceeds 300mm proximity, ensure adequate guiding to prevent rod bending under side loads. A plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX290S
- ✓ 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 SI100AX290S FAQ
Yes, the AirTAC SI100AX290S is discontinued. The direct replacement is the SAI100AX290S. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 290mm stroke, G1/2 port, and mounting fixtures exactly.
The G1/2 port is fixed by the 100mm bore. 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX290S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX290S replacement — usually within 7-8 hours.