01-10-2009, 12:01 PM
This link shows reproductions of these bellcaps with a couple viewed from the inside, also the outside view of them shows just how the countersink looks on the top of the domes. It is put in with a centre punch to create the countersink, then the hole is punched thro' with a 2mm taper drift on a domed former that has a 2mm hole in it.
http://www.northumberland-computers.com ... cap075.jpg
http://www.northumberland-computers.com ... cap075.jpg
Brian Stobbs