I own a small C-2 type lathe, which has served me well since many years. The C-2 is branded differently. Mine happens to be branded "Hercules MDB 3500" there are also brands like "Sieg C-2" and many more. This is how mine look(ed) like.
Basically it is the smallest lathe I could find at that time, that had a geard rod drive of the lathe saddle for fast adjustment with a handwheel, but also allows to couple the main saddle to a leadscrew which allows thread cutting.
Over the years, I have done a lot of hobby work with that lathe and it has served me well once I set it up properly and got to know it well.
One annoying thing was the revolver type tool hoder, which allows to use a few tools at a time, but is quite annoying when you have to cange tools more often. The main disadvantage is, that you have to use spacer blocks or sheets under the the tools to adjust the hight correctly.
Recently I came accross a suited tool holder system that allows to quickly interchange tools that are fixed in separete holders. The set is very simple and not so expensive.
I bought mine at RC-Machines in Germany. The order number is RCSWH-1, extra inserts are RCSWH-1E.
One problem I found when working with the new holders was that they extend significanly further towards the chuck. As a result, the tip of the cutting tool is only above the saddle when the top slide is at a position on the very right. This is however not a good setting for cutting, because the dovetail guide of the upper slide is only engaged along a small part of its length. For "normal" top slide positions, the tip of the cutting steel is over the left edge of the saddle which can cause the saddle to tilt.
My solution to the problem was to add a block of brass next to the base on which the holder sits. I used two M4 screws to fix the brass to the top slide. The screws are sunk into the brass so that they are below the surface. The brass block was a bit higher in the beginning, but then I put the top slide into my mill, aligned it as good as I could with a gauge and took off 0.1mm of the original base, consequently evening out the brass block to exactly the same level.
For fixing the holder, I tapped another M10 thread into the top slide, to insert the M10 bolt that holds down the holder more to the right.
This is how the modification looks like:
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