Powerhead: This is the engine or motor that drives the auger. Gasoline-powered models are common for their portability and power, while electric augers are quieter and emission-free, suitable for smaller jobs or indoor use. Hydraulic augers are typically found on heavy machinery like excavators.
Auger Bit (or Flighting): This is the drilling part, featuring a spiral screw design that scoops out soil as it rotates. Auger bits come in various diameters and lengths to accommodate different hole sizes and depths. Some have specialized tips for drilling through different soil types, including rocky or clayey ground.