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Thread: Fixing Cross Slide Backlash on my South Bend 11

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    Supporting Member winkys workshop's Avatar
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    Fixing Cross Slide Backlash on my South Bend 11

    Here's an improvement and a fix I made to my South Bend 11. It's a 1931 model and later models didn't have the same problem (see video). However, the new cross slide nut worked out fantastic and I based the design on later models. The backlash went from .040" to .004"!


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    H.L (10-01-2020), Home-PC (10-02-2020)

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    Supporting Member metric_taper's Avatar
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    I watched this yesterday. Nice correction of the original packaging problem with the interference problem.

    My small lathe came from the factory with lots of backlash.
    So I installed a DRO when Enco had them on sale a few decades ago.

    Keith Fenner another youtube channel I watch just did a repair on his large lathe. It has this nut with a slot cut in it and set screws to adjust the backlash as it wears.


    What was the cross feed screw pitch of your lathe?

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    Supporting Member winkys workshop's Avatar
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    It's a 1/2"-10 acme thread. I've seen this method of fixing and like it but there isn't enough room on my lathe. Plus the original nut was cast iron so I suspect it would break. But thanks for the info.

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    Great job Winky!


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