chinese atc spindle ?

[NordicCnc]

I do this on all ball-screws longer than 1000mm on both X & Y. The reason is to lower ballscrew whip, 2 fixed bearings provides more support and also allow the screw to be pre-loaded with tension.



Not required on ball-screws less than 350mm.

I see. How do you apply the pre-load with 2 fixed bearings? I thought the common way to do it was using a double ball-nut.

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[JAZZCNC]

I see. How do you apply the pre-load with 2 fixed bearings? I thought the common way to do it was using a double ball-nut.

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You didn't read it correctly, I said to preload the screw with tension. I'm not preloading the ball nut I'm just putting the screws under tension so it doesn't whip.

[NordicCnc]

You didn't read it correctly, I said to preload the screw with tension. I'm not preloading the ball nut I'm just putting the screws under tension so it doesn't whip.

My bad, thanks for clarifying!

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