There are many methods to process rolling elements, such as rigid ball cold stamping or semi-hot stamping, steel ball hot stamping and die forging. The former is used for small-diameter steel balls, while the latter is used for large-diameter rigid balls. The process is as follows: wire or bar annealing-cold stamping (or hot stamping or die forging of bar)-low temperature annealing-spheroidizing annealing-filing-soft grinding-quenching-cold treatment-low temperature tempering-rough grinding-supplementary tempering-fine grinding.
There is also the processing technology of needle roller and roller: annealing-cold stamping, cold rolling or turning-quenching-cold treatment-low temperature tempering-rough grinding-additional tempering-fine grinding-finished product.