Jim,
? I figured somebody was going to say that. :) I researched the other Proxxon setup with the high speed tool but didn't want to go that route for some reason. And I read some good reviews about the TBM 115 where people use if for PCB's like here:
So I think I will be alright. If not, I could build my own little drill press and get the high speed motor but I have too many things going on right now.
Thanks
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On 3/4/2019 11:57 AM, Jim Higgins wrote:
Received from Dave at 3/3/2019 02:41 PM UTC:
I bought a new Proxxon TBM115.
The Proxxon TBM115 has a max spindle rpm of 8,500. Conventional wisdom is to use an rpm at least 3X or 4X as fast as that to reduce the chance of breaking a lot of bits. At 8,500 rpm your feed rate will have to be extremely slow to avoid breaking a lot of bits... perhaps slower than you can achieve consistently with the Proxxon TBM115.
Jim H
