This standard specifies the parameters of horizontal milling and boring machines. This standard applies to newly designed general-purpose tabletop, planer-type, and floor-standing horizontal milling and boring machines.
JB/T 4241.1-1999 history
2011JB/T 4241.1-2011 Boring and milling machines with horizontal spindle.Part 1:Types and parameters
1999JB/T 4241.1-1999 Horizontal boring and milling machine parameters