I've just received my water cooled 2.2kW chinese spindle. I've wired to the VFD and it spins; a promising start.
I set up a dial indicator on the inside of the spindle taper to measure the spindle runout, and on my indicator with 0.0005" divisions, it only moves from 1/2 to 1 indicator, .0005" (0.0127mm), higher than the 0.005mm "runoff" promised.
I then chucked a ground 10mm bar using a 10mm collet (cheap ebay collets) I get about 3 - 4 divisons or about 0.002" (0.05mm) run out.
Is that a lot? Will I notice it?
I want to use my spindle for machining wood, aluminium and drilling PCBs, with drills down to about 0.5 mm.
I've noticed the inside taper of the spindle is quite rough, compared to the collet holder I have for my mill drill which looks ground.
Thanks,
Frank