This standard specifies the type and size of the boring shaft end of floor-standing milling and boring machines. This standard applies to boring spindles of floor-standing milling and boring machines with a boring spindle diameter of 130 to 260 mm.
JB/T 4366.1-1999 history
2011JB/T 4366.1-2011 Floor type milling & boring machine spindle end.Part 1:Boring shaft end dimension
1999JB/T 4366.1-1999 Floor type boring and milling machine Main shaft end Dimensions of bored shaft end