Just out of interest - here is a picture of the inside of my lathe spindle. The groves actually convey the chips back to the chuck end whilst running. I put a ball bearing in the middle one day to see which way it went.
Mind you, the back of the spindle extends past the gears, which also helps keeps the chips away from the gears.
Mind you, the back of the spindle extends past the gears, which also helps keeps the chips away from the gears.
Hunting American dentists since 2015.