Shop for Generator Heads & Alternators
We carry both Generator Drive and Belt Drive Alternators
- Linz Electric
- Mecc Alte
Types of Alternators - Single-Bearing vs Two-Bearing
The alternator shaft, often called the rotor because it rotates, is usually supported by two bearings. This is called a double-bearing alternator because there are two bearings. When the rotor is directly coupled to the prime mover (internal combustion engine, gas turbine, water turbine, etc) it may rely on the prime mover’s end bearing to support it’s weight and allow it to turn smoothly. This configuration eliminates one bearing on the alternator shaft and such an arrangement is called a single-bearing alternator.