This standard specifies the requirements for the manufacture and acceptance of horizontal milling and boring machines. This standard applies to ordinary horizontal milling and boring machines with boring spindle diameter less than or equal to 130mm.
JB/T 4241-1993 history
2020JB/T 4241.3-2019 Horizontal milling and boring machines Part 3: Specifications
2006JB/T 4241.4-2006 Boring and milling machines with horizontal spindle - Part 4: Specifications
1993JB/T 4241-1993 Technical conditions of horizontal milling and boring machine