Thread cutting in chinese ballscrew

[Neale]

Is squareness going to be a massive issue in this case the nuts only serve to retain the ballscrew in the fixed bearing holder?

Ta

As the man says, squareness is absolutely important. The bearings typically come with a retaining nut with an accurately (one hopes...) machined face specifically for this purpose. From memory, the nuts on mine didn't look like standard M10 - aren't they a much finer thread (like 1mm pitch, not 1.5?). Might be interesting to find a die of that size.