Lapping It Up: Setting up for precision hand lapping

Comments · 79

• JO

  @johnyoungquist6540 · 3 years ago

  Inspired by Tom Liptons 3 plate video I bought 3 8 inch rounds from MCmaster turned them round and flat. Then ground them flat. Then made a plate holder for my CNC mill. I programmed the grinding motion and went through several grits using the 3 plate sequence. Hours of grinding was done I used a combination of linear and rotary motion. The results were extraordinary with no hand work. Using the CNC machine is well worth it, In high school I made a telescope mirror but made a grinding machine first. Just lazy I guess.

  15

• JA

  @jacquelinesears1770 · 2 years ago

  i have been looking for a good explanation of reading what the optical flat is telling me that was the hands down best one period thank you

  7

• CY

  @cylosgarage · 3 years ago

  Wonderful lapping content aside, super impressed by that dbit cutter! Didn’t look like there was hardly any burr at all

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• JO

  @JohnGrimsmo · 3 years ago

  Absolutely fantastic Spencer, thank you!

  2

• BY

  @byronwatkins2565 · 2 years ago

  If the line spacing is not uniform, then this IS important: it means the surface is curved perpendicular to the lines.  This can be observed by tilting the optical flat along a perpendicular line and thus rotating the interference pattern.

  1

• WA

  @WallaTool · 3 years ago

  great video! lol nice intro

• CH

  @chrisj4570g · 3 years ago

  I played bass for Lap It Up.

  1

• RO

  @ronwhittaker6317 · 2 years ago

  Love Robbin silly

  1

• GE

  @geckoproductions4128 · 2 years ago

  thanks for the explainer about optical flats

• AL

  @AlmostMachining · 3 years ago

  Great job Spencer !!!

• FL

  @Flatlapper · 3 years ago

  Hey there, just found your channel.  Right up my ally. Not a ton of good lapping explanation content out there.  The Oxtool series was quite good.  It's great to see some new stuff being posted !  I'm looking forward to following along. keep up the great work Sir!

  2

• CA

  @carlhitchon1009 · 1 year ago

  The interference test is more accurate if you get the fringes to be large e.g. say only three fringes show.