This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX350, 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 SI100BX350
The AirTAC Airtac SI100 Standard Cylinder SI100BX350 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 SAI100BX350, 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 → SAI100BX350
- 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 SI100BX350
The AirTAC SI100BX350 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 350mm stroke. It delivers 3927 N push force at 0.5 MPa via a G1/2 port. The direct replacement is the SAI100BX350, matching the interface, bore, stroke, force and mounting exactly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This SKU lacks a magnet, so it cannot take a sensor. For safe sizing, expect a working load around 2356 N (60% of [email protected]) or a 200 kg vertical lift. The SUS304 stainless rod option resists corrosion, while a Viton H seal extends heat to 150 C.
Airtac SI100 Standard Cylinder SI100BX350 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX350 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX350 |
| 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 SAI100BX350 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 SAI100BX350 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 SI100BX350
| 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 SI100BX350 Is Used
Heavy Press Clamping
Secures large metal castings during machining operations, utilizing the 3927 N push force to maintain rigid clamping without flex.
Bulk Material Diversion
Actuates heavy lane guides over 350mm to redirect dense product flows on high-throughput sorting conveyors.
Replacing the Airtac SI100 Standard Cylinder SI100BX350 with the SAI100BX350
To replace this SI100BX350 with the SAI100BX350, verify the ISO 15552 mounting interface, 350mm stroke, G1/2 port and M20x1.5 rod thread. Because this is a no-S SKU, it cannot accept a magnetic sensor; order a magnet-equipped version if position feedback is needed. At 0.5 MPa it pushes 3927 N (pulls 3681 N); the neighbouring 80mm bore yields 2513 N, and the 125mm bore yields 6136 N. The 350mm stroke requires an external guide to prevent rod bending and side-load wear. The air cushion only decelerates the load; it does not hold position. For secure load holding on air loss, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX350
- ✓ 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 SI100BX350 FAQ
Yes, the AirTAC SI100BX350 is discontinued. The direct replacement is the SAI100BX350. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 350mm stroke, output force, G1/2 port and mounting accessories.
It features a G1/2 air port. The thrust 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 SAI100BX350
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX350 replacement — usually within 7-8 hours.