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26th May 2019, 09:54 PM #1Intermediate Member
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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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26th May 2019 09:54 PM # ADSGoogle Adsense Advertisement
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26th May 2019, 11:34 PM #2
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
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27th May 2019, 12:23 AM #3
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
DerekVisit www.inthewoodshop.com for tutorials on constructing handtools, handtool reviews, and my trials and tribulations with furniture builds.
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31st May 2019, 07:29 AM #4Intermediate Member
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Nice!! Very detailed walkthough and some great picutes!
I like the idea with the Magic marker on the leading edge!
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31st May 2019, 10:03 AM #5GOLD MEMBER
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I used Kuffy's guidance https://www.youtube.com/watch?v=Q2XlcOxa6Lk
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31st May 2019, 10:39 AM #6SENIOR MEMBER
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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?
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31st May 2019, 10:57 AM #7
Same process.
Regards from Perth
DerekVisit www.inthewoodshop.com for tutorials on constructing handtools, handtool reviews, and my trials and tribulations with furniture builds.
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2nd June 2019, 11:16 PM #8
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3rd June 2019, 05:52 AM #9GOLD MEMBER
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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.
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3rd June 2019, 06:20 PM #10SENIOR MEMBER
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I've always sharpened mine the same way as Wonga, quick and easy.
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3rd June 2019, 09:18 PM #11GOLD MEMBER
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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
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7th June 2019, 05:20 AM #12Intermediate Member
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7th June 2019, 12:14 PM #13GOLD MEMBER
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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.
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7th June 2019, 04:44 PM #14
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
DerekVisit www.inthewoodshop.com for tutorials on constructing handtools, handtool reviews, and my trials and tribulations with furniture builds.
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8th June 2019, 06:21 AM #15Intermediate Member
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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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