Odd Weldon grinding fixture ?

jljim · Mar 4, 2020

Had this on then shelf for a few years, haven’t paid much attention to it till now. Did a google search and didn’t find any pictures like it. The patent search only had a generic image of the Weldon style end mill fixture. The cams are ground with a decreasing radius to a sharp rise followed by a short flat. That are marked, see the pics. The spindle takes a 4c collet, there were a couple fractional sizes in the box. The tilt base was tagged as such, no other tags on the fixture. Any ideas ?

strokersix · Mar 4, 2020

Radial relieving setup perhaps. Sharpen taps.

jljim · Mar 4, 2020

The single event nature of the cam didn’t seem compatible with a multi flute tool. I have a Hibco tap grinder that adapts for sharpening 2,3 and 4 flute taps. Single flute counter sinks ?

Illinoyance · Mar 4, 2020

As it is it appears to grind radial relief on single flute cutters (contersinks). There may have been other cams available for multi-flute cutters. That would make it much more versatile. I did notice the fixture was sitting on a sine-bar base. That eliminates the need to set the cutter below the wheel center (or above depending on what direction one is grinding).

jljim · Mar 7, 2020

Single flute grinding looks like the best choice given the cam profiles. I have a 9/16” 4c collet on the way. Then I can use the collets from my Black Diamond drill grinder to chuck up some counter sinks and see what happens...

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Odd Weldon grinding fixture ?

jljim

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Illinoyance

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jljim

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