This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX350SH, 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 SI100BX350SH
The AirTAC Airtac SI100 Standard Cylinder SI100BX350SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 350mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX350SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX350SH
- 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 SI100BX350SH
The AirTAC SI100BX350SH is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore, 350 mm stroke, and SUS304 stainless steel rod. It delivers 3927 N push force at 0.5 MPa via a G1/2 port. The direct replacement is the SAI100BX350SH, sharing identical mounting, force, and stroke specifications.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI variants the SI lacked. The H seal option extends temperature tolerance to 0-150 C.
Airtac SI100 Standard Cylinder SI100BX350SH Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX350SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX350SH |
| Bore size | Ø100 mm |
| Stroke | 350 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 SAI100BX350SH 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 SAI100BX350SH 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 SI100BX350SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×350 | 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 SI100BX350SH Is Used
High-Force Actuation
Drives heavy stamping presses and large metal-forming fixtures requiring up to 3927 N of push force at 0.5 MPa with a 350 mm travel distance.
Pallet Handling
Indexes heavy loaded pallets on transfer lines, utilizing the SUS304 stainless rod for corrosion resistance in humid washdown environments.
High-Temp Ejection
Ejects molded parts from hot machinery zones safely, leveraging the Viton H seal to maintain integrity in ambient temperatures up to 150 C.
Replacing the Airtac SI100 Standard Cylinder SI100BX350SH with the SAI100BX350SH
To replace the SI100BX350SH, order the SAI100BX350SH. Confirm the ISO 15552 mounting interface, G1/2 port, M20x1.5 rod thread, SUS304 rod, magnet, and Viton H high-temperature seal. If downsizing, an 80 mm bore yields 2513 N push at 0.5 MPa; if upsizing, a 125 mm bore provides 6136 N. Because this is a 350 mm stroke, use external guides to prevent rod bending and side-load wear. A plain cylinder drifts without air; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX350SH
- ✓ 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 SI100BX350SH FAQ
Yes, the SI100BX350SH is discontinued. The direct replacement is the SAI100BX350SH. It is dimensionally interchangeable per ISO 15552, retaining the same 100 mm bore, 350 mm stroke, G1/2 port, and mounting interface.
It features a G1/2 port. 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 SAI100BX350SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX350SH replacement — usually within 7-8 hours.