Odd Weldon grinding fixture ?
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  1. #1
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    Default Odd Weldon grinding fixture ?

    f289e083-5f24-45ed-a663-8ee0b54ec49e.jpgHad 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 ?a4b226f1-6072-4b9d-af59-30be49820bc1.jpg9618e669-c3c3-496b-b8b3-adfd6fdf5e37.jpg528a3929-1a5e-48f9-a1d2-75b0fafe9b9f.jpg86a74c70-c9c3-4864-8a6a-9bb1efd1b6c0.jpg

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    Radial relieving setup perhaps. Sharpen taps.

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    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 ?

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    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).

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    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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