The ULTIMATE Guide to the Negative Rake Scraper Woodturning with Sam Angelo
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- เผยแพร่เมื่อ 9 ก.ค. 2024
- Sam takes a close look at 3 categories of (NRS) Negative Rake Scrapers: NRS's with two symmetrical bevels, Specialty scrapers, and NRS's with a round end. He shows tools from each category, sharpens a few, and demonstrates using these tools in various turning situations. To view your favorite topic, check out the time codes below-just click on the time to the left of the topic.
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TimeCode-chapters
00:00 Introduction
*Tools/sharpening/ turning with each
01:58 Geometry of scrapers
03:38 Examples of “symmetrical” scrapers
04:45 Turning with scrapers with a symmetrical grind
13:11 Sharpening scrapers with a symmetrical grind
15:32 Round Nose scrapers
*Examples of these scrapers
18:14 Turning with round nose scrapers
24:39 Sharpening Round nose (NRS’s) scrapers
27:02 The optimum angles for a NRS
28:05 Examples of “specialty” scrapers
31:26 Using specialty scrapers in a turning situation
41:17 Sharpening some specialty scrapers
Conclusion and thanks
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Thanks Sam, you cleared up a lot for me on the grind of negative rake scrapers. Seeing you use them helped a lot.
Sam, thanks for your reply. Wanted to thank you for your excellent videos. Straight forward, covering important subjects, well done and thank you for that. Wanted to share an observation as a new turner. Turning got a whole lot more enjoyable once I was sharpening effectively. Fine lathe, good tools, good techniques, is still not fun when a guy's tools are not sharp. I believe that sharpening is the most basic skill that then leads to everything else. Please continue making videos, they are truly excellent and greatly appreciated.
Very helpful Sam, as always. Thanks and stay well. Cheers from Clancy.
Excellent, thank you!
Thank you Sam, informative and entertaining as usual. Very well produced. 👍👍Have a great day and stay safe.🙂🙂
As always you are a wonderful teacher and demonstrator. Thanks Sam. We would love to have you join in on a worldwide woodturners zoom meeting. We meet every Wednesday.
Sam, you old dog. Been doing this ever since my first intro to neg. rake scrapers.
Love the new "you" in ur videos.
Great choice of video.
I really liked this Sam. Thanks for a very complete video with a ton of excellent advice on use.
Great explanation video
Sam, this has to be one of the most valuable instructional videos I've seen in a long, long time. I hit the "save" button so quickly you wouldn't believe it. One major point is that some tools are too short to sharpen on a wide platform IF they are handled. I love being able to remove handles and take full advantage of a nice, flat platform. I have some short parting tools that would be impossible to sharpen correctly if the handles were attached. I made similar comments on a Mike Peace video just yesterday. I depend heavily on jigs, fixtures, sharpening systems, etc. I especially appreciate your inclusion of angles on the bevels of different configurations of NR scrapers. Thanks again for the help!
Thanks very much. Sam
I was having trouble getting my scrapers to work properly. I used your information and resharpened them and I couldn't be more pleased with the results.
Glad it helped. Sam
Lots of good info, Sam.
Thanks, I have been practicing with my Boxmaster scraper
Excellent and informative as ever Sam!👍👍👍👍👍👍👍👍👍👍😎😎😎
Glad you enjoyed it Sam
good info - thanks Sam
Great video, Sam...very informative! I always need more instruction in sharpening...thanks!
Glad you enjoyed it!
Great lesson Sam. I only have DYI negative rake scrapers at the moment, but you have inspired me to buy one or two.
A very informative and well presented video Sam.
Cheers
Mike
Thanks very much Mike, it’s great to hear from you. In preparing for this video I watched some of your videos on scrapers. I really learned a lot from your approach to using scrapers. Be well
Sam
Thank you Sam!
I tilt my regular scraper up about 10 degrees, whamo, I have a negative rake scraper.
Hi Sam, thanks for another very informative video. With experience I’ve come to prefer using a round nose NR scraper on the outside of a vessel. It has a much longer edge which equals more time at the lathe and less time at the grinder. (It also avoids those potentially embarrassing 90 degree corners contacting the wood😂).
Thanks for sharing! Sam
Great info have been turning for years but too much sanding thanks
Sam, i just reviewed your you tube video on negative rake scrapers. Did I miss the angles that you have on that Boxmaster four angled scraper that you like so well? If not, what are they set at: the side angles and the tip angles. thank you.
JTFIII
I use a burnishing rod to freshen up the burr ... reduces trips to the grinder and saves steel.
Me too with a carbide rod.
Yes good idea.... Sam
Very informative. I may try to make one of those soon, I could totally use one. On a seperate note. is there anything you recommend to make out of the metal dowel left on the end of a spindle gouge, once I have ground off the entire flute?
Cat's claw ring tool
I am sure you could turn it into a scraper of some sort or maybe a point tool. Thanks SAM
Great informative video Sam. Looks like I'm gonna have to check out the Boxmaster tools.
Take care, Dave
Come on Dave, pry open that wallet and spend some of that cash ha ha
@@WYOMINGWOODTURNER You talked me into it, you silver tonged devil! Lol!
@@davidmorgan7522 Ha you got the devil part right brother
Are you setting tool CL above or below bowl CL when turning inside ?
Hi Sam Great video, would you also include a Bedan and Point tool as an NRS?? Wolfgang in Australia..
I will address this comment/question in my next “Notes from the Turning Shop video” Thanks
To be published on June 5th 2022 but great question...
Sam
Sam, you didn’t say what grit your CBN wheel is in your demo on the right side of the Steel City grinder. Is it a 180 grit? Is 180 grit the best for raising a burr on scrapers?
Do you use higher grit wheels for other purposes… like the 350 or 600 grit wheels?
Thanks, on the right side it is an 80 grit wheel. The left wheel is 180. I do not have any wheel that is finer than 180. Sam
Easier than all of that math. I had to replace a CI Sq carbide cutter. Rockler didn't have the appropriate negative bevel scraper, so I bought the standard. When I started turning, I had a hell of a time with the scraper catching the corners (pen turning). So what did I do? I looked at the back end rake, turned the whole thing over, and used the back side as a negative rake scraper. NO hitches. NO binding, just beautiful curls.
April, I have a few carbide type tools-mostly for hollowing. I find them very aggressive and at time difficult to control. I recently bought one for turning the inside of lidded boxes and it is just hard to control. (Maybe its me???) Thanks for your comment. Sam
Sam. i noticed you were working with a robust lathe and stated that your lathe was turning at 1400 rpm. My robust lathe out of the box does not have a way to know the speed of the lathe. What did you do on your lathe to give you that information?
It sounds like you have the American Beauty Lathe. That is probably what you saw in the video. If you look at the speed dial on the remote control unit, there is a scale around the dial. There are two scales for the two belt positions. This will tell you pretty accurately what speed you’re turning at. Let me know if you have another question. Thanks, Sam.
Very useful, Sam. Question- why would you ever need to sharpen the top bevel on a NRS? I always figured I only needed to do that when I used up enough of the steel?
I will address this comment/question in my next “Notes from the Turning Shop video” Thanks
To be published on June 5th 2022
Sam
Hi sam, why is there a small hole in the tool you are using on the little box at 12:30 ish? Best regards.
John,
I know what you’re talking about. But I have absolutely no idea why it’s there. Wish I knew Sam.
@@WYOMINGWOODTURNER Haa haa! Weird or what. Thanks Sam.. Keep up the good work. Best regards.
Hi Sam. I have a question: I wonder, how many lathe tools did you have, all together??
OMG I can't count them all....😄 I can't count them all ha ha maybe I have too many
Sam
Is there any reason not to convert my heavy ordinary scraper to negative rake?
I got a really thick conventional Sorby round nose scraper used with my first lathe. I never could figure out what it was good for until I turned it into a NRS for inside of bowls.
@@MikePeaceWoodturning thanks. Kinda thought so. Professional opinion counts
I will address this comment/question in my next “Notes from the Turning Shop video” Sam
Hİ👋👍