This part of JB/T 5245 specifies the types and dimensions of the spindle ends of benchtop drilling machines, general benchtop drilling machines, and light benchtop drilling machines. This section applies to the spindles of benchtop drilling machines, general benchtop drilling machines, and light benchtop drilling machines.
JB/T 5245.6-2006 Referenced Document
GB/T 1443-1996 Machine tools--Self-holding tapers for tool shanks