Ballscrew runout

[Voicecoil]

What sort of runout should one normally expect from a rolled Chinese ballscrew I wonder? I've been measuring the ones I recieved using a DTI on the round portion of the nut and am getting values of slightly over 0.1mm - but then how precise is the nut body??

[magicniner]

Given what it is that's a reasonable runout for the outside of the nut body, you shouldn't extrapolate this to be a true representation of screw runout.