This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X290S, 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 SI100X290S
The AirTAC Airtac SI100 Standard Cylinder SI100X290S 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 SAI100X290S, 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 → SAI100X290S
- 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 SI100X290S
The AirTAC SI100X290S 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 through a G1/2 port, it is replaced by the direct replacement SAI100X290S. This upgrade retains the exact ISO 15552 mounting interface, bore, stroke, and output force, fitting existing fixtures perfectly.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SI-SKU includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI family also introduces SAIL lock and BSAI clamp-lock variants absent in the SI line.
Airtac SI100 Standard Cylinder SI100X290S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X290S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X290S |
| 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 SAI100X290S 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 SAI100X290S 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 SI100X290S
| 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 SI100X290S Is Used
Heavy Press Clamping
Ideal for securing heavy automotive or structural components during machining, utilizing the 3927 N push force at 0.5 MPa to hold parts firmly against cutting loads.
Pallet Diversion
Drives robust routing gates or pop-up stops on high-mass material handling lines, where the 200 kg vertical lift capacity easily manages accumulated pallet weight.
Vertical Lift Gates
Actuates large industrial safety doors and loading dock barriers, benefiting from the 290mm stroke and adjustable 36mm air cushions to decelerate the heavy gate at stroke end.
Replacing the Airtac SI100 Standard Cylinder SI100X290S with the SAI100X290S
To replace the SI100X290S, order the SAI100X290S and verify your ISO 15552 mounting interface, M20x1.5 rod thread, G1/2 port, and the -S magnet requirement for current AirTAC switches. When sizing, note this 100mm bore yields 3927 N push at 0.5 MPa; dropping to an 80mm bore gives 2513 N, while a 125mm bore provides 6136 N. Because the 290mm stroke exceeds 300mm, ensure adequate guide support to prevent rod bending and side-load wear. A plain cylinder drifts on air loss—the 36mm cushions only decelerate—so for load holding, specify the SAIL lock variant, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X290S
- ✓ 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 SI100X290S FAQ
Yes, the SI100X290S is discontinued. The direct replacement is the SAI100X290S. It shares the identical ISO 15552 mounting interface, 100mm bore, 290mm stroke, output force, and G1/2 port, fitting existing fixtures without modification.
This double-acting cylinder features a G1/2 port and 25mm rod. It delivers 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N at 0.9 MPa, and a theoretical maximum of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X290S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X290S replacement — usually within 7-8 hours.