Machining Comparators in reverse

Look on this as a ‘Trade tip’
This is a custom comparator, so I am doing the finish machining on a manual lathe.
The most import part of the job other than boring the hole accurately is to keep everything concentric and maintain datums and dimensions.
So, instead of swapping tools and going through the ‘Cut, measure, cut’ process again, I put the drive in reverse and use the boring bar to cut the shoulder from the back of the job instead of the front. This saves me several minutes of faffing around and everything is ready for the other end of the comparator.
Machining is often about thinking outside of the box, not what you do, but how you do it.
The current operation always has an impact on the following op.
For scale, the boring bar is solid carbide, 4,0mm wide and bloody expensive, so I tend to look after them as they tend to not fare well under radial loads
and why am I telling you this? Because you need to know.

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