This part of JB/T 2858 specifies the types and parameters of thread grinders. This section applies to newly designed thread grinders with mobile worktables and mobile grinding wheel frames, universal thread grinders, screw grinders, worm grinders and internal thread grinders.
JB/T 2858.1-2017 history
2017JB/T 2858.1-2017 Thread grinding machines.Part 1: Types and parameters