03-18-2012, 12:54 AM
Depends on what size the bit is, but I once had to use a small grinding wheel in a dremel to basically grind the bit out. It was a threaded hole, and I had to then drill a larger size and use a helicoil to get it back to the proper size. It's a real pain. 
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Kevin
Check out my Shapeways creations!
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Kevin
Check out my Shapeways creations!
3-d printed items in HO/HOn3 and more!
<!-- m --><a class="postlink" href="https://www.shapeways.com/shops/kevin-s-model-train-detail-parts">https://www.shapeways.com/shops/kevin-s ... tail-parts</a><!-- m -->