Turning Ringed Objects
Turning ringed objects is article about Machinery bookmarked by shane with ID 1228044025 was uploaded on 01-04-2019 and has been viewed 399,492 times.
An effective mandrel for turning napkin rings and other annular objects can be made as follows.Choose a suitable hardwood (such as hard maple) and mount the wood to the faceplate with the grain oriented perpendicular to the axis.
Turn down the end of the mandrel to give a slip fit with the workpiece, leaving a larger-diameter locating shoulder on the base as shown in the sketch.Next, drill and tap the end of the mandrel for a tapered pipe plug of suitable size.
First select the recommended tap drill size for the pipe thread and drill into the end of the mandrel 3/4 in.or so deeper than the locating shoulder.Then tap the hole so that a pipe plug will thread in halfway.
The resulting threads, though rough in appearance, are quite strong if the grain is oriented as suggested.To complete the mandrel, cut two crossed saw…...