BallNuts, 1,2 or a double.

[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

[routercnc]

Stuart,

I did this a while ago so trying to remember the exact figure. Around 0.05mm (50 microns) from memory based on a 16mm diameter 5mm pitch chinese ballscrew and single nut. Measured this using a DTI on the Y axis and jogging it from Mach3 back and forth in 0.01mm steps.