* They are both made in China, with the inevitable consequences. However, the consequences are not always as expected. I find the bearings are still pretty good, the headstock alignment is pretty good, but all the fasteners are rubbish. Any cap-heap bolr which is active will have to be replaced with an Unbrako.
All gone only cap screws remain
* I hope the ball screw has the same pitch as the lead-screw you are replacing, because the back-gearing is designed to work with the lead screw to get all the thread combinations. As this is very unlikely to be the case, you may have an interesting time getting the thread cutting going. Good luck.
Not sure why id keep any of that junk, the computer will cut the threads not the bucket of gears and crappy lead screw (only has about 3mm of backlash - I must have got a good one)
* The use of a ball screw may place extra loading on the main lead-screw bearings. Check adequacy.
Bearings are gone too
* The back gears do need changing for different threads. I hope you have left enough room/access for this. In addition, those cast iron gears get extremely filthy with iron and carbon dust after a while. Trust me, I KNOW!
Gearbox is gone as well as the gears - wana buy them?
* I have the standard small Qwik-change tool-post holder on my machine, and haven't had any problems with its rigidity. But I tend to machine fairly gently most of the time.
The machine did not come with a quick change and i didnt want to use the pathetic 12mm tooling, with the 2hp motor with free machining i can take about 2-2.5mm passes.
* The gibs on the saddle do need regular adjustment in my experience. But, that is not too difficult.
Yep i saw that when I had it in the mill the other day.
* I still have the 3 and 4 jaw chucks which came with the machine of course, but these days I tend to use an ER32 collet system as much as possible.
Me too, the MT4 headstock is real easy to get col lets for, works great.
thanks.