http://www.conradhoffman.com/advancedsharp.htm
Advanced Tool Sharpening for the Lathe with Special emphasis on Threading Tools
Many people create HSS lathe tools using nothing more than a bench grinder and get perfectly acceptable, if not downright excellent, results. For most normal sized projects with moderate tolerances that may be all you'll ever need. As tolerances get tighter, or improved surface finishes are required for decreasing part sizes, better tools are needed....
Advanced Tool Sharpening for the Lathe by Conrad Hoffman
Advanced Tool Sharpening for the Lathe with Special emphasis on Threading Tools
Many people create HSS lathe tools using nothing more than a bench grinder and get perfectly acceptable, if not downright excellent, results. For most normal sized projects with moderate tolerances that may be all you'll ever need. As tolerances get tighter, or improved surface finishes are required for decreasing part sizes, better tools are needed....
Advanced Tool Sharpening for the Lathe by Conrad Hoffman