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31-07-2015 #5
well...
I have a denford triac, its got a sem MT30U4 servo motor -
http://igor.chudov.com/projects/Brid...ata_Manual.pdf
although a very good motor with lots of torque it only does 4000rpm, so my feed rates are really slow. but yes I can do a 2mm deep cut in ally with an 8mm cutter, or a 1mm deep cut in ally with a 20mm cutter without any trouble.
what I was thinking was to get one of these Chinese spindles, swap the bearings out on my mill so they can handle the speed and do a 2:1 reduction. so id be looking at 12000rpm. so I would gain a bit more torque.
I don't actually need to run the spindle at slow speeds, I use threadmills for tapping etc...
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