BallNuts, 1,2 or a double.

[Robin Hewitt]

The cheap double nuts are shimmed so the low backlash quoted lasts until it beds in.
Springing nuts is a right royal pain in the backside but if you have gone anal on backlash then you don't really have an alternative.

[Stupoty]

Ok so the pre-loaded ones arnt adjustable to take up ware in them?

(sorry if thats a dim question)
:)

Stuart

[Robin Hewitt]

I may be out of date, been a few years since I bought ball screws.
You can fit oversize balls, that really stiffens them up, but nothing I know lasts, except springs.

[Boyan Silyavski]

The Chinese ball nuts are actually back slash free. I would get a double ball nut if i was so worried. These are not the Chinese ball nuts like before 4-5 years, when they were back slashing.

[Stupoty]

The Chinese ball nuts are actually back slash free. I would get a double ball nut if i was so worried. These are not the Chinese ball nuts like before 4-5 years, when they were back slashing.

Hello,

thanks for the info.

what is cross compatability like? If i ordered screws and nuts and then decided somthing wasn't working so well would I be able to buy any brand and mix and match or would that be problematic?

Stuart

[JAZZCNC]

Hello,

thanks for the info.

what is cross compatability like? If i ordered screws and nuts and then decided somthing wasn't working so well would I be able to buy any brand and mix and match or would that be problematic?

Stuart

IME none mix n match well unless coming from same company and then depends how old.? Tooling changes etc make difference to screws/nuts.
For instance I've got some Old screws from China and decided to replace worn nuts from same supplier and the current nuts supplied while fitting were not a very good fit and needed larger balls. They Worked but not straight fit and needed tweaking.

Regards best way then I think is double nuts with springs washers but like robin says it comes with a price, thats being a royal pain to fit and get right also IMO slightly more wear due to higher constant friction.
Shimmed Double nuts are ok but they need servicing occasionally, which shouldn't really be a problem as it's a good idea, esp on lathe, to have strip down every 12-18months or so to give a good clean and fettleing.!

[Stupoty]

IME none mix n match well unless coming from same company and then depends how old.? Tooling changes etc make difference to screws/nuts.
For instance I've got some Old screws from China and decided to replace worn nuts from same supplier and the current nuts while fitting were not a very good fit and needed larger balls. They Worked but not straight fit and needed tweaking.

Regards best way then I think is double nuts with springs washers but like robin says it comes with a price, thats being a royal pain to fit and get right also IMO slightly more wear due to higher constant friction.
Shimmed Double nuts are ok but they need servicing occasionally, which shouldn't really be a problem as it's a good idea, esp on lathe, to have strip down every 12-18months or so to give a good clean and fettleing.!

Thats good to know (compatibility) i will make sure i get them all together, once iv'e waded through the billion and a half available options :)

Stuart