This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX350H, 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 SI100BX350H
The AirTAC Airtac SI100 Standard Cylinder SI100BX350H 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 SAI100BX350H, 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 → SAI100BX350H
- 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 SI100BX350H
The AirTAC SI100BX350H is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore, 350mm stroke, Viton H high-temperature seals (0-150 C), and a SUS304 stainless steel rod. Delivering 3927 N push force at 0.5 MPa, its direct replacement is the SAI100BX350H, which shares the exact G1/2 port, M20x1.5 thread, and mounting interface.
The SAI upgrade features an improved piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Since this SKU lacks a magnet (-S), it cannot accept position sensors.
Airtac SI100 Standard Cylinder SI100BX350H Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX350H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX350H |
| 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 SAI100BX350H 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 SAI100BX350H 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 SI100BX350H
| 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 SI100BX350H Is Used
High-Temp Ejection
Ejects molded parts from hot zones using the SUS304 rod and Viton H seals rated for 0-150 C environments.
Heavy Pallet Diversion
Diverts heavy pallets along assembly lines, utilizing the 3927 N push force at 0.5 MPa for reliable actuation.
Replacing the Airtac SI100 Standard Cylinder SI100BX350H with the SAI100BX350H
To replace the SI100BX350H, order the SAI100BX350H, confirming the ISO 15552 mounting interface, 100mm bore, 350mm stroke, G1/2 port, and Viton H seals. Because this is a no-S SKU, it cannot take a magnetic switch; use external limit switches if needed. If sizing down, the 80mm bore yields 2513 N push at 0.5 MPa; if sizing up, the 125mm bore yields 6136 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. With a 350mm stroke, use external guides to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX350H
- ✓ 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 SI100BX350H FAQ
Yes, the SI100BX350H is discontinued. The direct replacement is the SAI100BX350H. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 350mm stroke, G1/2 port, and mounting fixtures. The SAI features an upgraded two Y-shaped element piston seal for lower start-up pressure.
The 100mm bore features a G1/2 air port and an M20x1.5 rod thread. 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. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX350H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX350H replacement — usually within 7-8 hours.