In which we learn about making and using cast iron laps and diamond slurry to achieve high finish and high accuracy surfaces in hardened tool steel. And have fun doing it.
Robin Renzetti: @ROBRENZ on YT and https://www.instagram.com/robinrenzetti/#
Tom Lipton: @oxtoolco on YT and https://www.instagram.com/oxtools/#
Adam Balogh: @laneymachinetechclassroom on YT and https://www.instagram.com/laneymachinetech/#
Referenced videos:
Tom Lipton: Making Flat lapping plates 1 - https://youtu.be/rHmsQEAx16o
Tom Lipton: Making Flat lapping plates 2 - https://youtu.be/-w4R2eAHHiI
Tom Lipton: Making Flat lapping plates 3 - https://youtu.be/Whyw5v7L70c
Robin Renzetti on the PFG Live, on lapping: https://youtu.be/0zCmqoEuuR4
Adam Balogh on the PFG Live, on lapping: https://youtu.be/2M2Hr6squDQ
McMaster-Carr:
The Cast Iron plates - https://www.mcmaster.com/8588T23/
Hyprez Diamond Lapping Slurry, 3 micron: https://www.mcmaster.com/4857A47/
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ERRATA:
Robin Renzetti (@ROBRENZ ) makes a very good point:
"Remember that the straight band only shows "straightness" not flatness. You must align the bands a second time 90° to the first to access straightness in that direction to determine "flatness".
Only one reading is like using a repeat o meter on a surface plate oriented parallel to one side only. The flat is showing all the information in one orientation but curvature 90° to the bands registers as variation in band spacing which is not easily discernible by the human eye."
Thank you, Robin!!
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