This part of JB/T 4366 specifies the type, size and marking of the spindle end keys of floor-mounted milling and boring machines. This section is applicable to the spindle end keys of floor-standing milling and boring machines with boring spindle diameters of 130mm to 320mm.
JB/T 4366.3-2011 history
2011JB/T 4366.3-2011 Floor type milling & boring machine spindle end.Part 3:Key dimension of spindle end surface
1999JB/T 4366.3-1999 Floor type boring and milling machine Main shaft end Dimensions of key on end face of main shaft