Reamer Sharpening Fixture

[rossbotics]

As always thanks PJs
Good quality reamers are a little pricey, the cost also reflects on the size of the reamer, the larger the more $ and so on, reamers are only sharpened on the end of the flutes, the entry, the most common cause of a reamer making an oversize hole is concentricity of the sharpening process, if one of the flutes is say .001" longer than the others then you have a wobble in the reamer as its cutting creating an oversize hole, its important to grind all the flutes a couple of times around or until you have no spark.

Thanks PJs
Doug

I'm running out of superlatives Doug, but it is beautiful and works like a charm. That fit on the pin was @¿@...nice, to say the least. Kind of a dedicated spindexer but the the no-lash nylon washer and gravity latch are excellent touches.

I'm not however running out of questions. ~~ Always been curious as to the price of reamers, (expensive in my book) is it worth sharpening the flute to an undersized dimension?? I get that the cutting is done at the entry and the flutes act more as a hone, but have seen used ones with seriously worn or dinked flutes in flea markets and garage sales, and wondered if concentricity becomes an issue on a deeper ream due to the wear? Or maybe runout in the drive spindle causing it?

Always thankful for your posts!!

PJ