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Surface Plate Calibration and Conditioning

oxtoolco · demo · Watch on YouTube

Mechanical & precision engineeringManufacturing & industrial processes

What it is

A look at how granite surface plates are inspected, calibrated and reconditioned using an autocollimator, a repeat meter and diamond-charged cast iron laps. Measurements are at the level of millionths of an inch.

Why Hacker News recommends it

Cited in threads on flatness and precision as a glimpse into a niche metrology profession.

  • 1 people recommended it
  • 1 different months
  • 0 strong recommendations
  • first 2017, last 2020

What HN commenters said

  1. “I like the glimpse into the hobby/profession shown on channels like this”

    Glimpse of expert calibration and lapping of surface plates

    205guy, 2020-04 · Recommendation · in “Hand Scraping a Truly Flat Plane (1908) [pdf]”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: surface plates, lapping, flatness, calibration, machining

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