This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX225, 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 SI100AX225
The AirTAC Airtac SI100 Standard Cylinder SI100AX225 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 225mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX225, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke225 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX225
- 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 SI100AX225
The AirTAC SI100AX225 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 225mm stroke. Because 225mm exceeds the 100mm bore's 1500mm max standard stroke, it is a nonstandard stroke. Generating 3927 N push force at 0.5 MPa, this legacy unit is replaced by the SAI100AX225. The SAI direct maintains the exact ISO 15552 mounting interface, G1/2 port, and M20x1.5 rod thread.
The SAI100AX225 features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This SKU has a SUS420J2 stainless rod (option A) but lacks a magnet, so it cannot accept CS1-B/DS1-B sensors. Note that plain cylinders drift without live air; use SAIL or BSAI lock variants for holding.
Airtac SI100 Standard Cylinder SI100AX225 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX225 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX225 |
| Bore size | Ø100 mm |
| Stroke | 225 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 SAI100AX225 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 SAI100AX225 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 SI100AX225
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×225 | 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 SI100AX225 Is Used
Heavy-Duty Pressing
Delivers 3927 N at 0.5 MPa for assembling bearings and seating heavy components in automated machinery.
Pallet Diversion
Provides robust actuation to push heavy product pallets off high-throughput packaging lines onto secondary tracks.
Material Lift Gates
Raises and lowers weighted safety gates on loading docks, utilizing the SUS420J2 stainless rod for moisture resistance.
Replacing the Airtac SI100 Standard Cylinder SI100AX225 with the SAI100AX225
To replace the SI100AX225, order the SAI100AX225. Verify the ISO 15552 mounting interface, 100mm bore, 225mm stroke, G1/2 port, and SUS420J2 rod. Since this is a nonstandard stroke, confirm availability. For sizing, the 80mm bore yields 2513 N [email protected], while the 125mm bore yields 6136 N. As this 225mm stroke exceeds 300mm? No, but any long stroke requires checking side-load and rod-bending limits, using guide rails to prevent binding. This no-magnet SKU cannot take a switch. A plain cylinder does not hold load without air; use an external pilot check valve or the SAIL/BSAI lock variants. The SAIF variant adds a built-in 4M valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX225
- ✓ 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 SI100AX225 FAQ
Yes, the AirTAC SI100AX225 is discontinued. The direct replacement is the SAI100AX225. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 225mm stroke, output force, G1/2 port, and mounting accessories.
The bore is 100mm with a G1/2 air port. Force output is 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 max of 801 kgf at 1.0 MPa. The rod is M20x1.5 with 36mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX225
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX225 replacement — usually within 7-8 hours.