Milling attachment for the engineers metal lathe and how it is mounted using a spigot

I bought a small cheap milling attachment from China. Now I can move the work in 3 dimensions instead of two. I removed the compound slide and made an adapter called a spigot so that the milling vertical slide could be mounted instead of the compound slide. This eliminates any movement that might come from the compound slide and its mount. Locking the carriage also helps when you are not moving the work in that direction.

Eliminating the compound slide means that the only way to move the work longitudinally (ie towards or away from the chuck) is to use the big wheel on the carriage apron, making fine movements more difficult. Using a DRO (digital read out system) helps considerably but is an added expense.

This works well for small jobs with light cuts. Mounting the work in the tiny 'vice' can be a challenge and much more robust and expensive attachments are available.

The video includes the addition of an adjustable ring to assist in adjusting the angle of the milling attachment using the degree calibrations marked on the cross slide.

Similar methods can be used for various brands of engineers metal lathes including this Boxford lathe, South Bend, Myford, Logan etc.

ALTERNATIVE METHOD:
I have a piece of L-shaped angle iron about 12 mm thick steel and 150mm along each edge. I could mount a spigot on one face. Then mount it on the cross slide and put a fly-cutter in the chuck to bore a hole the right size to take the spigot of the compound slide, so that it can be mounted vertically on the angle iron. Then the work can be mounted on the T-slot of the compound slide - one day...

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