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  1. #1
    Join Date
    May 2019
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    germany
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    Smile How do you sharpen Card Scrapers?

    IMG_7319.jpg
    So recently I have gone back to a tool that rarely gets used in my shop... the card scraper!

    I think the reason people tend not to use these is that its much easier to grab a piece of sandpaper than the scraper, but the scraper IMO produces a much better finish than sandpaper ever could. The simple reason is that a scraper is cuting away material rather than sandpaper which abrasively removes material.

    So I decided to share a quick and easy method to sharpen them, Heres my Video: https://youtu.be/4s1yHnclP8c

    My Question to you guys however...
    What do you think to card scrapers and how do you sharpen them?

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  3. #2
    Join Date
    Jul 2015
    Location
    Hunter Valley
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    56
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    1,342

    Default

    Disclaimer: I haven't actually had to do this yet, but I did save off a video about how to do it for when that time comes about: https://www.youtube.com/watch?v=qSJ-FsQQz8k

  4. #3
    Join Date
    Apr 2001
    Location
    Perth
    Posts
    10,810

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    My Fool Proof method ...

    Step1: flatten both sides of a the card. I use a well worn 600 grit Eze-lap diamond stone. This is 10 years old and now the equivalent of about 3000 grit.





    Step 2: use a magic marker along one edge (texta to us Aussies) to ensure you get it all.



    Step 3: Once both sides are done (I do all 4), it is time to square the edge on the diamond stone. Use the magic marker again.





    Step 4: This is the point where many think that they have done enough. They run the card over the wood (here, softish quarter grain Tasmanian Oak). Nothing but dust ...





    Step 5: Use a proper burnisher. Not a screwdriver shaft - too soft to do a damn thing. I use a carbide rod. A smooth carbide rod does not require lubrication. All else benefit from a drop of oil.





    Step 6: Draw out the steel. This is one of the vital ingredients. You want to pull the steel outwards with the burnisher. You will not create a proper hook without doing so. About 5 strokes from the left and 5 from the right.





    Step 7: Turn the hook at about 5 degrees. Do the 5 and 5 again ...



    Step 8: This is another crucial omitted step - do it again but at closer to 10 degrees.



    Step 9: Now take your shavings!




    Regards from Perth

    Derek
    Visit www.inthewoodshop.com for tutorials on constructing handtools, handtool reviews, and my trials and tribulations with furniture builds.

  5. #4
    Join Date
    May 2019
    Location
    germany
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    Nice!! Very detailed walkthough and some great picutes!

    I like the idea with the Magic marker on the leading edge!

  6. #5
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    Sydney
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  7. #6
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    Mar 2018
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    Sydney
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    Probably a silly question but how is this done for curved (convex and concave) card scrapers? Is this the same process?

  8. #7
    Join Date
    Apr 2001
    Location
    Perth
    Posts
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    Same process.

    Regards from Perth

    Derek
    Visit www.inthewoodshop.com for tutorials on constructing handtools, handtool reviews, and my trials and tribulations with furniture builds.

  9. #8
    Join Date
    Nov 2003
    Location
    Sydney
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    Here is an alternative. I file the scraper with a good quality file. Back and forth a few time and it is ready.

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    Visit my website at www.myFineWoodWork.com

  10. #9
    Join Date
    Apr 2011
    Location
    McBride BC Canada
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    3,543

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    I make my own from 3" pieces of hard steel lumber strapping. Dozen at a time.
    Always chalk the files to cut smoothly and cleanly. I use the file tang for burnishing.
    I follow the written and illustrated instruction in ch 11 Scrapers of Leonard Lee's book = The Complete Guide To Sharpening.
    It is so clearly written that I felt I could work up my own scrapers successfully.

  11. #10
    Join Date
    May 2019
    Location
    Adelaide
    Age
    63
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    500

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    I've always sharpened mine the same way as Wonga, quick and easy.

  12. #11
    Join Date
    Jun 2005
    Location
    Helensburgh
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    I saw this the other day modifying a scraper to work better according to Chris Schwartz and according to him improving the performance with less effort

    https://blog.lostartpress.com/2019/0...-card-scraper/
    CHRIS

  13. #12
    Join Date
    May 2019
    Location
    germany
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    25

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    Quote Originally Posted by Wongo View Post
    Here is an alternative. I file the scraper with a good quality file. Back and forth a few time and it is ready.
    So You dont create a Hook as it is normally done, Interesting!! Ive never had any success doing it like that.

  14. #13
    Join Date
    Apr 2011
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    McBride BC Canada
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    Leonard Lee claimed you have the choice of a square edge or a hook.
    The work piece is of far more importance to me than the scraper beyond being functional.
    Usig a chalked file then a token effort at a hook is adequate.

  15. #14
    Join Date
    Apr 2001
    Location
    Perth
    Posts
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    Below is the most amazing scraper for shaping or rapid removal of waste. It does not provide as smooth a finish as a card scraper prepared with stones, but I bet it does a far better job than one prepared with a file, plus it works so fast.


    I made the following out of the end of a 3/16" thick O1 plane blade. It must be flat and hardened steel.

    Take it to the grinder (I use a 180 grit CBN wheel, but others use white wheels) and create a hollow around the edge.








    And you are done ...




    Regards from Perth

    Derek
    Visit www.inthewoodshop.com for tutorials on constructing handtools, handtool reviews, and my trials and tribulations with furniture builds.

  16. #15
    Join Date
    May 2019
    Location
    germany
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    25

    Default

    Interesting! Ive never seen anything like that before.... Ill have to give that a try at some point. How exactly do you use it? Same as a scraper or flat to the workpiece?

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