07-22-2012, 09:47 AM
Wong, can you measure the depth of the sample bushing's countersink? A plug in the straight bore held just at the small end of the taper would give you the depth using a depth mic or digital caliper (if that level of precision is acceptable).
Busy Bee 12-36 lathe, Busy Bee Mill drill, Busy Bee 4x6 bandsaw, Homemade 9x17 bandsaw, Ad infinitum.