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Eh up!

interestingly i saw this today
90CW-Lathe.jpg


this is a high end micro lathe, its also available as a watchmakers lather, basically the same thing with collets rather than a chuck . This is £4k and add another £2k for accessories, but my point is, look at the size and weight of the base compared to chuck and tool post.
 
Here are a couple of photos of my watchmaker lathe. It gets used a bit. Some for watch repair, and a fair amount for hobby which keeps my skills up for the watch repair stuff.

Watch lathe 01.jpg


Watch lathe 02.jpg


Then there are a bunch of collets, chucks, special collets and other tools that I have stowed away in a drawer below.
 
Its a wonderful thing, i love anything like this :) I think the rigidity is tied to torque and balance. The heavier the cut the more torque is created and thats where you need rigidity. Imagine if the machine was not bolted down, if you tried to grab the chuck the whole machine would try and spin instead but that said, the amount of torque created turning watch parts would be miniscule.
Weight in its self can be a problem, when i was setting up the Colchester, even with very heavy castings the thing wanted to settle on its floor mounts and this caused a twist in the bed. Anyway this is getting way off topic but time spent getting the floor flat, and i mean shimming the feet to a mm, was time well spent ;-)
 
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