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Mill leadscrew backlash adjustment

DPittman

DPittman

Ultra Member
I'm trying to adjust the x axis backlash on my milling machine. There are two adjustment bolts on the leadscrew nut and I have adjusted them up to the point the x axis handwheel turn hard the one direction but it seems to have little effect on the backlash itself. I suspect the problem is with how the nut itself is held in place. I don't know how it is held and I fear having to dismantle a whack to access it. My mill is an Asian 6x26.
The video might help.
https://youtube.com/shorts/ti2CsOgReoc?feature=share
 
Might be good to see your parts schematic but my ex RF-45 looked like this. If the (yellow) leadscrew nut itself is loose that would affect things. It might be retained in a detent but likely is held in place by bolt(s). So the way to reach is remove one end of the leadscrew handle assembly (blue), unscrew the leadscrew from the other end, slide the table off & have a looksee.
 

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I forgot to say remove gib strips before sliding table off. Depending on your shop space layout there may be one better direction than another to slide table off. The end assembly might have roll pins (spring pins? whatever they are called) for the handles if its typical Asian machine. And maybe a bearing ball & spring related to the graduated dial? Anyways try to absorb as much as you can with the parts manual beforehand.
 
Problem was I forgot to put things in gear properly....one is supposed to put the BRAIN in gear FIRST then all processes afterwards go much smoother! o_O

The leadscrew nut has a bolt directly beneath it that holds the nut in place firmly. I was thinking(not thinking) it was an X axis travel limit bolt. I tightened that up and all is well again.

Oops embarrassing.
 
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