Some cool precision metal machining images:
Machine Vice
Image by tudedude
An Acme or Square thread
Dial Gauge Indicator
Image by tudedude
John Bull British Indicators "inch and a half"
This is possibly one of the indicator’s utilised on the Gypsy Moth Engines At Dehavalind engines
Beginning to polish
Image by tudedude
Having utilised Swiss Files it is now time for distinct grades of emery stick