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  1. #1
    Join Date
    Jul 2014
    Location
    Tracy, California. USA
    Posts
    11

    Default Hand Scraping a Hand Plane to .0001" Accuracy

    G'Day,
    Greetings from the USA.
    I have decided to Metal Scrape an imported hand plane that i bought new for less than $10 USD, just for the fun of it.
    I'm going to give the project away after it's completion.

    If you like metalwork and you have never seen metal scraping being performed or it's result, i would recommend taking a look at youtube under hand scraping or Biax Scraping. like this great, but lengthy, video:
    https://www.youtube.com/watch?v=YvZFOyo63Ks

    the video inspired me to do the same thing , with a lesser quality plane that was more dimensionally challenged.
    some pictures for the interested!
    HF33 1.jpg
    HF33 2.jpg this picture left shows the poor contact, illustrating the initial rub on my surface plate
    HF33 3.jpg this pic was taken after the first scraping cycle, there was instant improvement- contact on 4 points


    Here are pictures taken as the process improves the flatness of the planes face:


    HF33 4.jpgHF33 5.jpgHF33 6.jpgHF33 7.jpgHF33 8.jpgHF33 9.jpgHF33 10.jpgHF33 11.jpgHF33 12.jpgHF33 13.jpg

    the pictures below illustrate the use of a 1" ball bearing being utilized to apply the force of the vice jaw to the plane without damage.
    HF33 15.jpgHF33 14.jpg

    i did make a youtube video that is redundant of the pictures you have seen here, only put to music.

    https://www.youtube.com/watch?v=aJQyAG8SR3E

    thank you for reading and watching.
    comments and questions are welcome!

    If you are interested in having your hand plane reconditioned to a instrument of accuracy,
    send an email to biaxscraper@yahoo (dot) com

  2. #2
    Join Date
    Dec 2007
    Location
    Sydney
    Posts
    395

    Default

    Is this one of those 'because I can' projects.
    My understanding was that a relieved area behind the iron offered less friction.
    As the plane had that naturally why not stop there?
    Did it blue flat when the iron was clamped back in?
    H.
    Jimcracks for the rich and/or wealthy. (aka GKB '88)

  3. #3
    Join Date
    Jul 2014
    Location
    Tracy, California. USA
    Posts
    11

    Default

    Hello,
    this is a Because I Can ,type of thread

    the scraped finish leaves minimal friction across the sole of the plane during it's intended role.
    i have not finished the project i'm still working on it.
    here are a few more pictures!

    HF33 16.jpg
    HF33 17.jpg

    Above are the sides of the hand plane after a few scraping cycles.

    Below are the same sides after considerable scraping.
    the first picture shows the hand scraping of a first time student who was interested in the craft.
    I was able to show him the methods and he did some really nice work as you can see.
    the second picture is the same side after a few cycles with the Biax scraper. it will soon be completed to my satisfaction.
    HF33 18.jpg

    HF33 19.jpg


    I started to contemplate the blades' accuracy in manufacture.
    i knew it wasn't going to be good, the pictures tell the ugly truth...
    HF33 20.jpg
    HF33 21.jpg
    The areas in blue show the only contact on my surface plate.
    if i were making this plane, it wouldn't have ever left my shop in the less than poor shape it was sold and received in.
    i knew the chinese stuff was junk but i have no idea how they can even get away with such inaccuracy.
    the project continues...
    thanks for reading.

  4. #4
    Join Date
    Mar 2011
    Location
    Dural NSW
    Age
    82
    Posts
    1,203

    Default Scraping & Peening

    Ulma Doctor
    Greetings from "The Great South Land"
    A while ago I hands scraped a No 3 Stanley Plane, its good & now works well. (The plane is old Patent Aug 1902)
    Although I have a Surface Grinding Machine the hand scraping adds a bit of interest to the tool, & its very accurate ! Also provides less area in contact, when planning, owing to the small "pockets" made by the scraping.
    The blade you have shown can be very easily corrected with a Peening Hammer.
    Mine is homemade, from toolsteel then hardened & tempered, its got a cross peen with edge ground (off hand) at 90 degrees, the sharp edge has about a 1/64" radius.
    The blade to be flattened, is placed on a flat steel block, concave side up, then firm, but light hits, about 1/8" apart are made across the concave, with the cross peen of the hammer.
    This imparts a compressive stress & curves or straightens the hardened blade.
    I have accomplished this many times, & it is very gentle, yet very accurate results, are achieved.
    Final honing & or lapping of the cutting edge can then be made.
    regards
    Bruce

  5. #5
    Join Date
    Jul 2014
    Location
    Tracy, California. USA
    Posts
    11

    Default

    Quote Originally Posted by Abratool View Post
    Ulma Doctor
    Greetings from "The Great South Land"
    A while ago I hands scraped a No 3 Stanley Plane, its good & now works well. (The plane is old Patent Aug 1902)
    Although I have a Surface Grinding Machine the hand scraping adds a bit of interest to the tool, & its very accurate ! Also provides less area in contact, when planning, owing to the small "pockets" made by the scraping.
    The blade you have shown can be very easily corrected with a Peening Hammer.
    Mine is homemade, from toolsteel then hardened & tempered, its got a cross peen with edge ground (off hand) at 90 degrees, the sharp edge has about a 1/64" radius.
    The blade to be flattened, is placed on a flat steel block, concave side up, then firm, but light hits, about 1/8" apart are made across the concave, with the cross peen of the hammer.
    This imparts a compressive stress & curves or straightens the hardened blade.
    I have accomplished this many times, & it is very gentle, yet very accurate results, are achieved.
    Final honing & or lapping of the cutting edge can then be made.
    regards
    Bruce
    G'Day Bruce,
    Thank you very much for the information!
    i'll employ the technique for the blade!!!
    Cheers,
    mike

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