This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX145S, 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 SI100BX145S
The AirTAC SI100 Standard Cylinder SI100BX145S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 145mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX145S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke145 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX145S
- 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 SI100BX145S
The AirTAC SI100BX145S is a discontinued double-acting ISO 15552 profile cylinder featuring a 100 mm bore, 145 mm stroke, and a SUS304 stainless steel piston rod. Delivering 3927 N push force at 0.5 MPa, it is replaced by the SAI100BX145S. This direct upgrade shares the exact ISO 15552 mounting interface, G1/2 port, and output force, fitting existing fixtures seamlessly.
The SAI replacement introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The original -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL, SAIF, and BSAI lock variants.
Airtac SI100 Standard Cylinder SI100BX145S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX145S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX145S |
| Bore size | Ø100 mm |
| Stroke | 145 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 SAI100BX145S 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 SAI100BX145S 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 SI100BX145S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×145 | 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 SI100BX145S Is Used
Heavy-Duty Pressing
Drives large stamping and forming fixtures requiring up to 3927 N of push force at 0.5 MPa, utilizing the robust 100 mm bore.
Corrosive Material Handling
Actuates heavy gates and diverter valves in washdown or chemical zones using the SUS304 (-B) corrosion-resistant rod.
Replacing the Airtac SI100 Standard Cylinder SI100BX145S with the SAI100BX145S
To replace the SI100BX145S, order the SAI100BX145S and verify the ISO 15552 mounting interface, 100 mm bore, 145 mm stroke, G1/2 port, and mounting accessories. The -B rod indicates SUS304 stainless steel, and the -S suffix means a magnet is present for CS1-B/DS1-B switches (the SAI uses current AirTAC switches). Sizing both ways: the neighboring 80 mm bore yields 2513 N push at 0.5 MPa, while the 125 mm bore yields 6136 N. Note that a plain cylinder drifts on air loss as the cushion only decelerates; for load holding, consider the SAIL or BSAI lock variants, or an external pilot check valve. Since the stroke is under 300 mm, side-load rod-bending risks are minimal, but standard guide alignment is still advised.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX145S
- ✓ 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 SI100BX145S FAQ
Yes, the SI100BX145S is discontinued. The direct replacement is the SAI100BX145S. It shares the same ISO 15552 mounting interface, 100 mm bore, 145 mm stroke, output force, and G1/2 port, dropping directly into existing machinery.
This 100 mm bore cylinder features a G1/2 air 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 maximum of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX145S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX145S replacement — usually within 7-8 hours.