Making Flat lapping plates 4 

In this video we begin to prep the copper penny laps. These laps will lapped together using the classic three plate method to generate perfectly flat planes. The surface will then be "charged" with diamond abrasive to make fixed abrasive type laps. We also answer some viewer questions and comments, discuss monochromatic helium light and some very large radii.
Link to cast iron raw material used for laps.
www.mcmaster.c...
Loctite 380 Link,
www.mcmaster.c...