Mmmmmm it'll be interesting to see if thats the problem .I recently bought a br2j machine that when I first saw it had an r8 spindle wich was nice because i have been collecting r8 tooling,when i went back to the machine sales to hear it running they said that when they started it with the r8 head it was making a horrid noise so they had fitted a complete head with a qc30 spindle from a later machine!!!!! so the big search for qc 30 tooling started!!! its been a nightmare but i have learned a lot ;o) yesterday i machined a non qc int 30 holder to fit the qc locknut and it has worked nicely so at least now I know I can make slightly cheaper tool purchases work for me. Qc 30 tools in the uk seem to be hard to find second hand and are bloody expensive new .I have a spare qc lockring wich has got 6 screws around it,the one on the machine has 3 like yours ,I have had them both to pieces they are identical and both have qc written on them,one is made by bristol erickson and the other (the one with 3 bolts) is made by kennametal,I have also been able to adjust the lockring too so that i can use a tool that i machined the flange slightly too thin on, anyway I'll watch for your test results,Jay  |