This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X290STC, 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 SI100X290STC
The AirTAC Airtac SI100 Standard Cylinder SI100X290STC 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 SAI100X290STC, 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 → SAI100X290STC
- 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 SI100X290STC
The AirTAC SI100X290STC is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 290mm stroke. Delivering 3927 N push force at 0.5 MPa, it features a TC trunnion mount, a G1/2 port, and a built-in magnet for legacy CS1-B/DS1-B sensors. AirTAC replaced this legacy unit with the SAI100X290STC, a direct replacement sharing the exact ISO 15552 mounting interface, bore, stroke, force, and port size.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for lower start-up pressure and extended life. If your fixture requires positive load holding, note that a standard cylinder drifts without live air; you will need the SAIL lock variant or an external pilot check valve.
Airtac SI100 Standard Cylinder SI100X290STC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X290STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X290STC |
| 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 SAI100X290STC 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 SAI100X290STC 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 SI100X290STC
| 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 SI100X290STC Is Used
Heavy Press Clamping
Applies the 3927 N push force at 0.5 MPa to secure heavy metal components during machining or stamping operations.
Pallet Lift Gates
Actuates large loading dock gates using the TC trunnion mount to accommodate pivoting structural loads safely.
Bulk Material Diverting
Drives heavy diverter arms on high-capacity conveyor lines, utilizing the 290mm stroke to clear wide pallets.
Replacing the Airtac SI100 Standard Cylinder SI100X290STC with the SAI100X290STC
To replace the discontinued SI100X290STC, order the SAI100X290STC. Confirm the ISO 15552 TC trunnion mounting interface, 100mm bore, 290mm stroke, G1/2 port, and the -S magnet for current AirTAC switches. When sizing, a 100mm bore yields 3927 N push at 0.5 MPa; dropping to an 80mm bore reduces this to 2513 N. Because the 290mm stroke exceeds 300mm guidance thresholds, ensure your mechanical guide handles side loads to prevent rod bending. A plain cylinder does not hold load on air loss—the cushion only decelerates. For secure holding, explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X290STC
- ✓ 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 SI100X290STC FAQ
Yes, the AirTAC SI100X290STC is discontinued. The direct replacement is the SAI100X290STC. It shares the identical ISO 15552 mounting interface, 100mm bore, 290mm stroke, output force, G1/2 port, and TC trunnion mounting, fitting directly into existing fixtures.
The 100mm bore uses a G1/2 port. 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. The rod is 25mm with an M20x1.5 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X290STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X290STC replacement — usually within 7-8 hours.