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making a scraper need steel

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Forum topic by Karda posted 07-04-2017 02:34 AM 935 views 0 times favorited 23 replies Add to Favorites Watch
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Karda

829 posts in 394 days


07-04-2017 02:34 AM

Hi, i want to make my own bowl scrappers but can’t find the steel, all I can find on ebay or Amazon is round, to short, thin or square. I looked at a couple companies but they don’t have M2 precision ground what kind do i want. could I but a round nose scraper and sharpen it so I can scrap with the side for doing the side of a bowl or box Thanks Mike


23 replies so far

View bc4393's profile

bc4393

57 posts in 983 days


#1 posted 07-04-2017 03:07 AM

Thin slitting saw blades work well. I have a drawer full of scrapers made from them. Its an old pattern makers trick. Once they go dull cut it in half and grind the teeth off. Something like one of these.

https://www.amazon.com/Slitting-Saw-Blade-16-HSS/dp/B01JTPM39M/ref=pd_day0_328_23?_encoding=UTF8&pd_rd_i=B01JTPM39M&pd_rd_r=4MKVNYAG1ZQXAHNT4N4J&pd_rd_w=10o0j&pd_rd_wg=xZlWI&psc=1&refRID=4MKVNYAG1ZQXAHNT4N4J

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Karda

829 posts in 394 days


#2 posted 07-04-2017 03:33 AM

a bowl scraper for turning not a hand scraper, I don’t have a way to cut up a saw blade. i have a grinder so I need a piece that is size all I have to do is shape it

View Madmark2's profile

Madmark2

373 posts in 428 days


#3 posted 07-04-2017 03:45 AM

Mcmaster.com sells all sorts of metal in all sorts of shapes and sizes. Overnight delivery is standard.

M

View Karda's profile

Karda

829 posts in 394 days


#4 posted 07-04-2017 03:52 AM

checked that out The M2 in the size I need would only cost 184.00. I have no Idea what other kind of hss I can use

View Loren's profile

Loren

9639 posts in 3488 days


#5 posted 07-04-2017 03:55 AM

You can grind down old files. They are quite
hard and trash otherwise.

O1 steel is also widely available. It comes
soft for grinding to shape It can be
hardened and tempered using a propane
torch and a coffee can of motor oil.

View TheFridge's profile

TheFridge

8336 posts in 1326 days


#6 posted 07-04-2017 04:04 AM

Look for tool bit blanks

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View Karda's profile

Karda

829 posts in 394 days


#7 posted 07-04-2017 04:31 AM

to short. I need about 1/4” x1”-1 1/4” X 12” piece of hss

View Wildwood's profile

Wildwood

2188 posts in 1975 days


#8 posted 07-04-2017 10:25 AM

Don’t know if you have the skills or equipment to do what you want to do. But it can be done!

Read what he says about old files! Also tools, equipment & skills needed in these two articles.
http://www.turnedwoodenbowls.com/pages/homemadecuttingtools.html

Russ echo first article about old files, but goes on to say can make good scrapers from truck springs with out special equipment and supplies. Have seen several homemade car spring scrapers and they do just as good as HSS.

http://www.woodcentral.com/russ/russ10.shtml

All about the burr on a scraper!
http://www.docgreenwoodturner.com/scrapers1.html

If don’t know what you are doing can actually take the temper or ruin HSS! Yes occasional bluing might not hurt much but too much not good for the steel.

-- Bill

View Redoak49's profile

Redoak49

2906 posts in 1829 days


#9 posted 07-04-2017 10:48 AM

Try ebay and search for O1 tool steel.

View Bill7255's profile

Bill7255

417 posts in 2125 days


#10 posted 07-04-2017 11:57 AM

1/4” is too thin for a 1-1/4” scraper. 3/8” would be ideal. However you can get a 1” X 5/16” BB scraper from PSI that already has a handle for about $20 plus shipping. Time you buy HSS I can’t see how it would be cheaper to make. My 1-1/4 scrapers are 3/8” thick from Thompson tools. Pricey, but well worth it. For tools you are going to use a lot get a good quality tool. If only occasional use ge BB or Hurricane.

-- Bill R

View LeeMills's profile

LeeMills

462 posts in 1141 days


#11 posted 07-04-2017 12:55 PM

I agree with others that 3/8 will be a lot better than 1/4 thickness in reducing vibration.
I’m pretty sure this is the PSI that I have heard lots of good + about.
https://www.pennstateind.com/store/LX130.html

For steel I usually go to Speedy Metals. Lots of sizes and sold by the inch or foot. This is tool steel not M2. They told me A2 or D2 would be best but I would call them. If you have a torch (not a little map) you can do an OK job hardening the steel yourself.
http://www.speedymetals.com/searchsuper.aspx?trk_msg=4AJLP8GMMU1493NV2NQ5UL2FKC&trk_contact=OPHIM443Q97GHN96Q52TB8UVFS&trk_sid=0GR7FCD62H2LVUKOVGPASF7MAS&utm_source=Listrak&utm_medium=Email&utm_term=http%3a%2f%2fwww.speedymetals.com%2fsearchsuper.aspx&utm_campaign=newsletter&utm_content=307

M2 gets very expensive and in bits the problem is the length. WTTools has some up to 8” length in M2 and M2+5% cobalt. Eight inch length is fine with me because I will Never be 6” over the rest. For smaller items like boxes I like the 1/2” square. They do not seem to show the standard M2 right now (normally $9) but do have the M2+cobalt for $15 which is what I would buy anyway.
Depending on your handle you may profile each end giving it double duty. The 1/2” thickness gives it a lot of support (think of you parting tool which is not nearly as wide).
http://www.wttool.com/index/page/product/product_id/37984/category_id/15882/product_name/RDX+Ground+Square+Tool+Bits

I know of no place that carries HSS in thick (3/8) and wide stock probably because it may not be used for metal working operations.
Just some possibilities…..

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

View Karda's profile

Karda

829 posts in 394 days


#12 posted 07-04-2017 04:59 PM

thanks for all the information Lee, I can see that making my own scraper would not serve any purpose. I t would be different if I already had the tools. I think I will stick with PSI. I like that scraper you showed, I have some questions, I want a scraper that I can use on the side of bowls or boxes if I try that, can that scraper be sharpened on the side. I know many turners regrind tools for a specific purpose but I don’t know what I can and can’t do. Thanks Mike

View SignWave's profile

SignWave

440 posts in 2875 days


#13 posted 07-04-2017 05:14 PM

Search for metric sizes:

https://www.amazon.com/uxcell-Machinist-Metalworking-Cutting-10x30x200mm/dp/B01HGTVJHU/
https://www.amazon.com/uxcell-Machinist-Metalworking-Cutting-10x25x200mm/dp/B01HGTVLL4/
https://www.amazon.com/uxcell-Lathe-Milling-Cutter-8x25x200mm/dp/B01HGTWB6I/

Whether these make economic sense is up to you.

I’ve made some smaller tools using similar parts, and for those, it made sense. The shipping is free, but slow, fwiw.

-- Barry, http://BarrysWorkshop.com/

View Karda's profile

Karda

829 posts in 394 days


#14 posted 07-04-2017 06:07 PM

thanks I’ll try metric

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Nubsnstubs

1207 posts in 1570 days


#15 posted 07-04-2017 06:40 PM

Mike, just because a scraper has a sharpened side doesn’t mean that you can have that whole side in contact with the side of the bowl. My experience is if I have more that 1/4” of cutting/scraping edge making contact, I’ll get chatter, and the more surface you have contact with, the more chatter you get. Keep that in mind when using your tools. I believe I mentioned that in my youtube video of the “Three Bead Tool” I made. The commercial round nose scraping tools I’ve seen and used are either right or left handed tools. They are sharpened from the nose around the side almost to the handle. Nice tools, but too much contact will create more chatter than you like. I made my own out of a leaf spring. It works for me….... Jerry (in Tucson)

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

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