This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX225, 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 SI100BX225
The AirTAC Airtac SI100 Standard Cylinder SI100BX225 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 SAI100BX225, 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 → SAI100BX225
- 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 SI100BX225
The AirTAC SI100BX225 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 225mm stroke. Delivering 3927N push force at 0.5MPa via a G1/2 port, it is replaced by the SAI100BX225. This direct successor shares identical ISO 15552 mounting dimensions, bore, stroke, force and porting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This specific SKU uses a SUS304 stainless steel rod (B option) and lacks a magnet, so it cannot accept position switches.
Airtac SI100 Standard Cylinder SI100BX225 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX225 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX225 |
| 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 SAI100BX225 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 SAI100BX225 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 SI100BX225
| 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 SI100BX225 Is Used
Heavy-Duty Pressing
Applies up to 5497N at 0.7MPa for seating bearings and forming robust components on automated lines.
Package Diverters
Drives heavy diverting arms across conveyor belts, utilizing the 225mm stroke and robust M20x1.5 rod thread.
Replacing the Airtac SI100 Standard Cylinder SI100BX225 with the SAI100BX225
To replace the SI100BX225, order the SAI100BX225. Confirm the ISO 15552 interface, 100mm bore, 225mm stroke, G1/2 port, and SUS304 rod. Because this SKU lacks a magnet, it cannot take legacy CS1-B/DS1-B sensors. For sizing, neighbouring bores (80mm/125mm) offer different footprints; at 0.5MPa this 100mm bore yields 3927N push and 3681N pull. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For held loads, use an external pilot check valve or the SAIL/BSAI lock variants. Stroke is under 300mm, so rod-bending side-load risks are minimal.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX225
- ✓ 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 SI100BX225 FAQ
Yes, the SI100BX225 is discontinued. The direct replacement is the SAI100BX225. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 225mm stroke, G1/2 port, and mounting interface. The SAI simply upgrades the piston seal to two Y-shaped elements for lower start-up pressure.
The G1/2 port is fixed by the 100mm bore. It delivers 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N at 0.9MPa, and a theoretical max of 801kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX225
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX225 replacement — usually within 7-8 hours.