To be more precise, if I'm going to use inch collets to hold metric shank end mills, which would offer better grip and least runout? I'm thinking ER, but I have a mess of DA collets... Or, settle for an import set of metric R8 collets?
Jon
DA vs ER collets for milling?
Jun 30, 2013
3 Replies
Whichever ones cost more most likely.
ER for heavy side milling. DA for lite milling.
ER 25 series seems to cover most stuff, short of 3/4. ER 32 for 3/4+ I have one ER45 for 1" shanks, altho I'm thinking ER32 can go to 1". If so, WTF did I get an ER45??? LOL
Metric or inch shouldn't matter, as each collet should overlap the next by some small amount. Funny, tho, I have trouble fitting some tap sizes, like 8, 10-32.... whazzup wit DAT?????
Suggest buy the proper size collet in whatever holder holder series that has the heaviest stiffness and mass
danielbauen.com/make/index.php/download_file/105/114/
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