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View Full Version : An excellent bit of small blacksmithing.



PeterSibley
02-04-2019, 05:00 PM
https://www.youtube.com/watch?v=Cpduan-kyqA

Wadsworth
02-04-2019, 05:15 PM
Wow. Very impressive. Combination spoke shave and razor!

Gib Etheridge
02-04-2019, 05:22 PM
It took me about 3 minutes to see what he was making.

That would be some very hi quality steel.

What is that slag that comes off of it composed of? Is it impurities?

Thanks Peter.

Hugh MacD
02-04-2019, 06:15 PM
WOW! Perfect drawknife! That'll last for generations. Again Thanks Peter!

Jay Greer
02-04-2019, 06:20 PM
Damn thats a sharp shaver and a work of art!
Jay

Stiletto
02-04-2019, 07:11 PM
I like that!

lupussonic
02-04-2019, 07:50 PM
Love it.

Thanks Peter..!

Todd Bradshaw
02-04-2019, 08:25 PM
Very nice. Plus, that guy can really hammer quickly. I figure he could probably rivet an entire Viking ship together in about twenty minutes. :)

Wiley Baggins
02-04-2019, 11:31 PM
That was awesome Peter, thanks for sharing it.


Very nice. Plus, that guy can really hammer quickly. I figure he could probably rivet an entire Viking ship together in about twenty minutes. :)

Ahhh, you beat me to the punch Todd. I was going to say that took less than 15 minutes and when you account for monkeying with the camera, etc. you could make a set of half a dozen all before lunch and still have time to whip up a nice set of chisels and gouges.

MN Dave
02-04-2019, 11:44 PM
Wow. File hardness HRC 65. That draw knife should hold an edge. Bearing steel can be a bit brittle though. 52100 is a common one for bearing races. I missed the temper, if it was included.

The material flaking off is just oxide scale. These are very pure alloys in bearings. They have to be very fine grained, clean metal.

This can be a difficult alloy to forge, so the smith in the video must know the material well. "O2, after knocking down one of those 52100 monsters looks like silly putty. (https://www.bladeforums.com/threads/forging-52100.1388388/)"

https://www.alphaknifesupply.com/zdata-bladesteelC-52100.htm
https://www.alphaknifesupply.com/Pictures/Info/Steel/52100-DS-Latrobe.pdf
Nerds only; Damascus, superplastic and UHC steel: http://www.hefajstos.agh.edu.pl/files/%5B1997%5D%20Ultrahigh%20Carbon%20Steels,%20Damasc us%20Steels,%20and%20Superplasticity%20-%20O.%20D.%20Sherby%20J.%20Wadsworth.pdf

jonboy
02-05-2019, 08:37 AM
All done in shorts and no gloves.....

bluedog225
02-05-2019, 09:45 AM
Wow! Well done. What a ton of work. Nice set of basic tools for the job.

Hugh MacD
02-05-2019, 11:54 AM
All done in shorts and no gloves.....
A friend of mine who's a professional blacksmith says he never wears gloves. If he picks up something hot he doesn't want to get halfway to someplace before it burns through the glove and he has to drop someplace inconvenient...like on his foot :)

Breakaway
02-05-2019, 01:54 PM
COOL!

Kevin

rregge
02-05-2019, 06:20 PM
For a ball bearing it is almost guarantee to be 52100
0.98 to 1.1% Carbon
1.3 to 1.6% Chromium
And a little bit on manganese and silicon

Rc 63 or above after hardening and tempering....with lots of Chrome carbides for wear resistance.

Kind of the poor mans O1 tool steel

Not slag coming off...very few micro inclusions in bearing steels...very pure...what is coming off is scale...without a protective environment the steel will rapidly oxidize at high temps if exposed to the atmosphere.

52100 is considered a non weldable grade of steel. (too much carbon)

Surprised no one asked how they got the balls between the inner and outer races to begin with....They squeeze the outer race in a press (elastic deformation only) and they put the balls (rolling elements) in. Release the pressure and you have a bearing. Can you tell I used to work for a steel company that made bearing steels.

Russell

MN Dave
02-05-2019, 07:43 PM
Is that forge using pumice and propane? It doesn't look like coal.

He did the triple quench, and I missed the temper, but there were two file hardness tests, HRC 65 and HRC 60.


Kind of the poor mans O1 tool steelKind of an odd comment for a bearing steel guy. I'd have expected you to be partial to your steels. The two steels are similar in a lot of respects. 52100 could be a little tougher and harder if you believe Knife Steel Nerds:

More nerd fodder,but more readable this time.
https://knifesteelnerds.com/2019/01/28/history-and-properties-of-52100-steel/

epoxyboy
02-06-2019, 03:42 AM
^ It looks like coke - basically coal with all the tarry volatile stuff driven off.

Pete

Powerwagon
02-06-2019, 11:23 AM
Cool video! He makes it look easy, but it's not. I'd like to learn some of those skills someday.

Thorne
02-06-2019, 12:52 PM
Amazing - thanks!

rregge
02-06-2019, 07:27 PM
We used to call 52100 the poor mans O1 because it cost less...tungsten is expensive.

52100 O1
Carbon 0.98 -1.1% 0.85-1.0%
Chromium 1.3 -1.6% 0.4 -0.6%
Manganese 0.25 - 0.45% 1.0 - 1.4%
Silicon 0.15% -0.30% 0.5% max
Tungsten NA 0.4 - 0.6%

Yes 52100 is hard (a function of the carbon) however carbon above 0.76% will have limited impact on hardness, however that excess carbon in 52100 will combine with chromium to form very small chrome carbides throughout the material...these chrome carbides are incredibly hard, however they don't increase the hardness of the steel. They have a major impact on wear resistance, and tools (just like bearings) is all about wear resistance.

This is why two pieces of steel with the same hardness, can have very different wear characteristics.

Gib Etheridge
02-06-2019, 10:23 PM
What a forum, eh? There's nothing that someone here doesn't know all about.

gypsie
02-07-2019, 12:54 AM
What liquid is he putting on the tangs before he pushes on the handles?

(he asks sheepishly.....)

PeterSibley
02-07-2019, 03:40 AM
I wonder what may have been a better piece of available scrap for this project ?

jonboy
02-07-2019, 06:02 AM
We were taught at school to heat the tang to a just a dark red and then push the wooden handle on hard so burnt its way in...Is the liquid he's using a lubricant or superglue?
Ha . Just watched it again. I'd remembered a little tube but that was for the ferrule...I'm guessing liquid paraffin maybe.

David W Pratt
02-07-2019, 08:59 AM
Beautiful, and daunting. I'll never get to his skill level. The knowledge about steels is pretty impressive, too

MN Dave
02-07-2019, 04:16 PM
Are the handles cedar?
I wonder what may have been a better piece of available scrap for this project ?Going with Russel's logic, bearing races certainly are the poor man's O2. Compared to buying new, a scrap bearing is almost free. Finding, let alone identifying a good piece of scrap tool steel can't be easy.
He did a nice job with the inner race too.

https://youtu.be/Yrkq32wmE04

Larks
02-08-2019, 04:12 AM
Thanks Peter, a great video and very inspiring. ‘Been on to a couple more courses while working down in Canberra, including a great forge welding class (at the same time playing with Damascus blade making) and am still looking for a decent anvil - I wonder if that one is still there...?? Also now keeping an eye out for an old forge blower but they seem to be a bit more available. I had an old Rapid one packed away a while ago but it seems to have walked with a few other old collectable tools at some stage over the years of moving about.