Metric Cross Slide Conversion

I recently bought a big pile of lathe spares, including a new leadscrew and nut to convert the cross slide to metric. I'm working on gradually converting the whole machine. I started on the cross slide because it's the most commonly used, and typically is used to the tightest tolerances.

Also pictured is a replacement backgear cluster (the original was missing teeth - almost certainly due to somebody using it to lock the drive whilst removing the chuck), an oil gun, some new oil nipples, rubber bushes for the belt cover, a drive belt, and a resettable micrometer dial for the cross slide. 

I removed the cross slide by unwinding it

Then removed the handle and micrometer wheel, holding the leadscrew in pliers and protected with cardboard

Removing the leadnut was pretty tricky. I worked it out slowly with gentle taps from a hammer. There was quite a lot of wear on the nut and screw.

Here's the new leadscrew installed and greased. I did not replace the micrometer dial at this time because I thought Myford had made a mistake. The new "metric" dial I received had 100 ticks, but the leadscrew pitch is 2mm. It turns out that the dial is made to match the 0.1" leadscrew, and there is no 200 tick one available. I have since replaced the fixed, Zamak dial with the new resettable one, but I'm considering machining off the numbers and engraving new ones.


 

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