How are magnet rods made?
Rod magnets are made very similar to the Alnico bar magnets with the exception of many rods approximately 6.5 to 11.5 inches long inserted into sand, removed and the molten magnet is poured in each cavity. Typical rod magnets used in pickups with the diameter of .187 start out at approximately .194 in diameter. For magnet diameters around .195 and slightly larger the raw magnet starts out at .210 in diameter and measured from the samples I have. The surface of the raw magnet is rough and pitted and one end is pointed similar to the shape of the molding tool and the other end is snapped off at the break-off gate used for pouring the molten magnet.
