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Posted on No 7 vs No 8

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unbob

396 posts in 556 days


#1 posted 03-06-2014 07:55 AM

I have heard experts quoted here as saying jointer planes do not need to be flat, perhaps they have never tried a LN jointer. The hard truth is, getting a vintage 24” iron plane flat to .0005” is a time consuming undertaking that takes tools and experience. That’s only 500 millionths. That’s why they say that. Here is one that is in process. This plane is considered a not so good of one, a Stanley 4 squarer 5 1/4 size. More of a cheaper home owners version of a Bailey. This one was bad .015” twist and bumps in the wrong places. Did a terrible job, would get nothing flat. Also, the worst example I have of having a near glass hard skin about .004” depth. when they are that bad I mill them. I used two cuts, got well under the hardness layer the a shallow finish cut using a carbide flycutter. Now scraping it true, the last couple of thousandths In this photo, the master reference-a tool I made over 40 years ago as an apprentice for rebuilding machine tools. This tool has been scraped to another Master. On this tool, prussion blue dye is applied. Then the plane is moved across it. The high spots on the planes sole pick up the dye. The carbide tipped tool in front is used to knock down the high metal on the planes sole. Continue the cycle until the the dye spots are evenly spaced across the sole of the plane. I have just a little ways to go, but the plane is working like a champ at this stage. If looking for the performance of a plane that cost hundreds out of a plane that cost $10, this is how to do it.
http://i170.photobucket.com/albums/u265/donsmonarch10ee/DSC01152_zps564859d7.jpg

Photobucket malfunction it seems.[URL=http://s170.photobucket.com/user/donsmonarch10ee/media/DSC01152_zps564859d7.jpg.html][IMG]http://i170.photobucket.com/albums/u265/donsmonarch10ee/DSC01152_zps564859d7.jpg[/IMG][/URL]



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