Broaching

• Internal broach on lathe - predrilled hole - then tool starts to wobble as driven by the lathe itself, or 2 driven heads?- [1]
• Manual broaching of an inner keyway - needs a plug + shim - [2]
• CNC broaching - has a stiff broach holder, no plug or shim. - [3]
• Hex stock to make a bolt and nut manually on a lathe, using tap and die for the threads - [4]
• Making threads on a lathe - explaining how threads are caught exactly at the same place if using a manual lathe - [5]