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scrapper angles

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Forum topic by Karda posted 08-15-2017 06:45 AM 712 views 0 times favorited 20 replies Add to Favorites Watch
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Karda

772 posts in 366 days


08-15-2017 06:45 AM

Hi, I am making my own round nose scrapper, what angle should I grind it to, I have watched a number of videos but none I watched mentioned angle thanks Mike


20 replies so far

View kaerlighedsbamsen's profile

kaerlighedsbamsen

1230 posts in 1525 days


#1 posted 08-15-2017 10:08 AM

Would love to help but not sure what you mean by round nose scrapper? A picture/drawing might help getting answers.
In genneral card scrapers and beading scrapers are ground to 90 degrees and scraper planes 45 before burnishing

-- "Do or Do not. There is no try." - Yoda

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LeeMills

449 posts in 1113 days


#2 posted 08-15-2017 12:58 PM

It may take a little playing around to find what you like best. Most are in the 70-80* range. Some folks like a lower angle down in the 55-65. Typically the lower the angle the quicker the edge blunts. I think it will depend on whether you are you are using it for bulk removal or for just final light cleanup.

-- We cannot solve our problems with the same thinking we used when we created them. Albert Einstein

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Karda

772 posts in 366 days


#3 posted 08-15-2017 05:29 PM

Thanks lee that gives me a starting point.
Here is a picture of a round scraper as requested.

View TheDane's profile

TheDane

5312 posts in 3475 days


#4 posted 08-15-2017 07:59 PM

Would love to help but not sure what you mean by round nose scrapper? A picture/drawing might help getting answers.
In genneral card scrapers and beading scrapers are ground to 90 degrees and scraper planes 45 before burnishing

- kaerlighedsbamsen

He is asking about scrapers used in woodturning on a lathe.

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

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Karda

772 posts in 366 days


#5 posted 08-15-2017 11:20 PM

sorry should have been specific I forgot about card scrapers

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papadan

3584 posts in 3180 days


#6 posted 08-15-2017 11:25 PM

Mike, I use card scrappers in turning. Helps smooth out bowls and plates when finishing.

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putty

1146 posts in 1418 days


#7 posted 08-15-2017 11:45 PM



Mike, I use card scrappers in turning. Helps smooth out bowls and plates when finishing.

- papadan

Well, that is interesting I’ll have to try that…thanks

-- Putty

View Nubsnstubs's profile

Nubsnstubs

1197 posts in 1542 days


#8 posted 08-15-2017 11:47 PM

Mike, my leaf spring scraper I made is at 65 degrees. Works great. What are you making it out of? ....... Jerry (in Tucson)

-- Jerry (in Tucson) www.woodturnerstools.com

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Karda

772 posts in 366 days


#9 posted 08-16-2017 03:20 AM

sorry Jerry I cheated I ordered a piece of 1095. after I cut it I have a 1 inch and a half inch . Now all I got to do is learn how to get them ot enough in the forge. I was going to try leaf spring but I decided to try a small piece I still have a lot to learn about just getting the bed of coal right, right now I am using wood not charcoal.

View Bill7255's profile

Bill7255

411 posts in 2097 days


#10 posted 08-16-2017 11:49 AM


Mike, I use card scrappers in turning. Helps smooth out bowls and plates when finishing.

- papadan

Well, that is interesting I ll have to try that…thanks

- putty


Card scrapers work well for removing small amounts of tear out. I use the all the time.

-- Bill R

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Karda

772 posts in 366 days


#11 posted 08-16-2017 05:48 PM

how do you use card scrappers same as a turning tool

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papadan

3584 posts in 3180 days


#12 posted 08-16-2017 11:13 PM



how do you use card scrappers same as a turning tool

- Karda


Just like any other tool, just hold it tight and just below center.

View REO's profile

REO

923 posts in 1886 days


#13 posted 08-17-2017 12:03 AM

Hmmmmm scrapers are the only tool I am aware of INTENTIONALY presented below center. all tools can be used as scrapers, but the rest are intended to shear the chip. gouges at or above center. bedan at or above center. skew definitely above center. if presented at or below center on external turnings a scraper CAN have a 90 degree edge then for the interior present above center and you can avoid some traumatic although very exciting events!

View Bill7255's profile

Bill7255

411 posts in 2097 days


#14 posted 08-17-2017 12:03 PM

I don’t use card scrapers with the lathe running!!!! Only with the lathe off to work small areas of imperfection.

-- Bill R

View Abter's profile

Abter

44 posts in 439 days


#15 posted 08-17-2017 04:31 PM


It may take a little playing around to find what you like best. Most are in the 70-80 range. Some folks like a lower angle down in the 55-65. Typically the lower the angle the quicker the edge blunts. I think it will depend on whether you are you are using it for bulk removal or for just final light cleanup.
- LeeMills

Newbie question: which angle goes with which purpose? In other words, is steep angle better for hogging or cleanup?

-- "Many men fish all their lives without ever realizing that it is not the fish they are after." {often mis-quoted as by H.D. Thoreau}

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