Quote Originally Posted by Carnel View Post
Hi Rick,
My readings:
2 digital volt meters

DVM1 Escort 1111A
readings: test cords only: 0.2 Ohm. Lathe (AI, dutch brand, ca 1960) 0.5 Ohms between chuck en ways, but same as between chuck and tool post
drill-mill: (HBM, dutch version of HarbourFreight, ca 2000) 0.4 Ohms between quill and cross table

DVM2 Velleman DVM4200
readings: test cords 0.3 Ohms. Lathe 0.5 Ohms (same conditions as above)
drill-mill: 0.4 Ohms

So at my machines the resistance is very low, in the order of 0.1 or 0.2 Ohms. With a lot of relative uncertainty in the milliohms range.
These are the lowest readings I've seen so far. I'm guessing that your machines are new enough to have ball bearings and not babbitted bearings. I once measured 0.2 ohms and it turned out to be a bit of swarf bridging the gap between spindle and bearing cover.

I could live with 0.2 ohms but not much lower.

Thanks!

Rick