This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX15S, 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 SI100BX15S
The AirTAC Airtac SI100 Standard Cylinder SI100BX15S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 15mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX15S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke15 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX15S
- 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 SI100BX15S
The AirTAC SI100BX15S is a discontinued double-acting ISO 15552 profile cylinder featuring a 100 mm bore, 15 mm stroke, and a SUS304 stainless steel piston rod. Delivering 3927 N push force at 0.5 MPa, it is replaced by the SAI100BX15S. This direct upgrade shares the same ISO 15552 mounting interface, G1/2 port, 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 built-in magnet supports legacy CS1-B/DS1-B sensors, while a plain cylinder drifts on air loss—use a SAIL lock variant or external rod lock for load holding.
Airtac SI100 Standard Cylinder SI100BX15S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX15S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX15S |
| Bore size | Ø100 mm |
| Stroke | 15 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 SAI100BX15S 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 SAI100BX15S 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 SI100BX15S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×15 | 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 SI100BX15S Is Used
Heavy Clamping
Generates 3927 N at 0.5 MPa to secure heavy metal castings during CNC machining operations.
Short Stroke Pressing
Executes high-force 15 mm pressing tasks for bearing insertion or light assembly work.
Corrosive Environments
The SUS304 stainless rod excels in washdown manufacturing zones requiring high push force.
Replacing the Airtac SI100 Standard Cylinder SI100BX15S with the SAI100BX15S
To replace the discontinued SI100BX15S, order the SAI100BX15S. Verify your ISO 15552 mounting interface, G1/2 port, and M20x1.5 rod thread. The -S magnet enables CS1-B/DS1-B switches (the SAI uses current AirTAC switches), and the -B rod is SUS304 stainless steel. If you need less force, a 80 mm bore yields 2513 N push at 0.5 MPa; for more power, a 125 mm bore yields 6136 N. Remember: a standard cylinder does not hold load without live air. The air cushion only decelerates near stroke end. For secure holding, use an external pilot check valve or explore the SAIL (air-released lock) and BSAI (clamp-lock) variants. The SAIF variant offers a built-in 4M valve for bores up to 100.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX15S
- ✓ 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 SI100BX15S FAQ
Yes, the SI100BX15S is discontinued. The direct replacement is the SAI100BX15S. It shares the same ISO 15552 mounting interface, 100 mm bore, 15 mm stroke, G1/2 port, and output force, fitting your existing fixtures perfectly.
This 100 mm bore cylinder has a G1/2 port. The 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 max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX15S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX15S replacement — usually within 7-8 hours.