07-08-2009, 10:17 PM
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| | | Join Date: Nov 2003 Location: Pennsylvania
Posts: 138
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Zoomed in endmill resharpening pics | |
I thought I would post a few of these for those who are interested. I have a Darex E90 sharpener with CBN and alum oxide wheels. The resharpened endmills are used by a few people in the shop to rough out (or abuse depending upon how you look at it). All the resharpening in these pics was done with a 80 grit CBN wheel which leaves little striations on the relief areas. You can see the grit sticking out of the substrate in the pic of the CBN wheel.
3/8 endmill resharpened with striations 
1/2 endmill showing primary and secondary relief
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primary and secondary galling
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80 grit CBN wheel close up (about 1/8 across). Notice the lumpy grains sticking out from the dressed wheel. This is what you want.
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180 grit CBN wheel. Notice the smaller and more dense grains
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'shavings' from regrinding endmills on 4-40 screw
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