minimum lead screw size and support bearing sizing

[dsc]

I've seen some calcs which include Euler's buckling load equations (column load), but unit-wise they don't make much sense. I think I will go the usual path of 'make it big enough so that there's no way anything can go wrong' that most people seem to take. Safety factor of 100 will do:)

For the lead screw I'm using standard M10 or M12 threaded rod and I will stick to standard ID 10mm angular contact bearings. It seems like going miniature can cost an arm and a leg.

Regards,
dsc.

[Swarfing]

I would go for a trap (square) type thread, threaded rod at that size would strip the nut very quickly regardless of the calcs.

[paulus.v]

You can try the 'column strength calculator' from Nook

[dsc]

I thought of using trapezoidal screw at the beginning, but I couldn't find anything with a fine enough pitch. M12 standard thread fine pitch is 1.25, smallest I could find in ACME screws is 1.5.

I'll try Nook, when they fix their website:) (seems to be down at the moment).

Regards,
dsc.