How do you make large auger bit?

To make a large auger bit, start with a sturdy piece of steel and shape the drill bit’s spiral flutes and cutting edge using a lathe or milling machine. Heat the steel to make it malleable, then forge it into the desired size and shape. After achieving the basic form, grind and sharpen the cutting edges for efficiency. Finally, heat-treat the bit to improve hardness and durability, ensuring it can withstand the rigors of drilling.