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[Highpower]

(02-12-2021, 05:14 PM)TomG Wrote:

(02-12-2021, 04:37 PM)Highpower Wrote: New arrival. Just a small end mill extension (1/2" x 5") and 2 collets. ($$$)

I've never seen one with a collet, usually it's just a ground bore for the end mill

Tom

I have a handful of regular (short) end mill holders (Enco) but have snapped carbide tools a bit too easily using them in the past. I haven't checked the run out on them but the bores seem to be a tight fit. Still I don't like the feeling of cranking down set screws against a carbide shank to hold a tool in place. Harvey claims a maximum T.I.R. of .0002" from shank to collet pocket on these extensions. Since I want to be able to get down into some deep pockets/cavities I figured the collet setup would be my best chance of getting 1/8" carbide ends mills to survive.

My 1/8" end mill holder is now dedicated for a spotting drill bit. No more side milling - with carbide anyway.