This standard specifies the type and size of the neck of the spindle end housing of an electric drill. This standard applies to the housing neck dimensions of electric drills, impact drills, hammer drills and other power tools that require the use of auxiliary handles connected with clamp-type handles.
JB/T 9606-2013 Referenced Document
GB/T 1804-2000 General tolerances Tolerances for linear and angular dimensions without individual tolerance indications
JB/T 9606-2013 history
2013JB/T 9606-2013 Neck sizes of spindle box of electric drills
1999JB/T 9606-1999 Neck sizes of spindle box of electric drills