Will these last me a life time?

USPS priority flat rate boxes are $8.10 to ship. You can order the boxes online or get them at the post office if they have them. boxes are free.
 
Any clue what alloy these are Scott ? I got them out of a gravel quarry.they came out of a secondary(gyratory ?) crusher.I have enough of the middle one's to make it worth analysis.The race for the bigger ones was a 3' circle :eek: They might make a good custom hammerhead ;)

Bigbearings.jpg
 
J.Marsillo said:
Any clue what alloy these are Scott ? I got them out of a gravel quarry.they came out of a secondary(gyratory ?) crusher.I have enough of the middle one's to make it worth analysis.The race for the bigger ones was a 3' circle :eek: They might make a good custom hammerhead ;)

Bigbearings.jpg
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Crushing applications are scary when it comes to knowing what kind of steel. The reason that bearings are sometimes case hardened is so that if a bearing begins to crack, the crack will stop at the softer (low carbon) core and prevent a sudden catastrophic failure.

Crushers have a lot of shock load going through them and are susceptible to fracturing rollers, so many times the bearings are not 52100. They are many times made of case carburized product.

Your chances of having 52100 are about 50%. If you know what the full part number is, I'll be able to identify them. Unfortunately, the part number is not on the rollers, but instead it is on the races. Do you have the races, or if you don't, can you find out from the person that you got them from what the full part number is?
 
bigbcustom said:
Purely for curiosity's sake, if one were to get a roller from the far right giant size bearing (you said 50# but I think that is a pretty conservative number), how the heck would you turn that into blades???? Anneal the whole thing and slice it? Plasma cutter?
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Find a friend with a 250# Chambersburg power hammer! Now THAT would be some fun forging! :D

-d
 
Nowicki said:
I've sent things through the post office in their flat rate boxes...I think it was less than $8 for 70 or 80 lbs.
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Flat rate boxes are the way to ship steel for sure! My mail lady hates me. :D

If you decide to sell some to folks on the forum, and Nowicki gets some, let me know and you can toss min in with his! :)

-d
 
Timken usedto make large bearings for shock and impact applications out of 3310 and 9310. These are high nickel case hardening steels.
 
Scott, I'll check the races I have for numbers. These are axle bearing races and are about 6"-9" in diameter, I have a couple different ones. Any info will be appreciated! :cool: :)
 
Deweyknives said:
Scott, I'll check the races I have for numbers. These are axle bearing races and are about 6"-9" in diameter, I have a couple different ones. Any info will be appreciated! :cool: :)
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I'll be online tomorrow evening hopefully. I'm traveling all day tomorrow (going to beautful Casper, Wyoming :grumpy: ). Hopefully I'll have a good internet connection at my hotel. Once I have the part numbers, I'll be able to help you.
 
those "biggest" bearings look pretty solid muthas. Where're they supposed to fit? The USS Iowa or something? :D
 
Scott, #572, #592A, #642D are the numbers I have here. One of the #572's had an eight digit number but I assume these are the important ones. :confused:

Hope you have a safe day on the road!! ;) :thumbup:
 
deker said:
Flat rate boxes are the way to ship steel for sure! My mail lady hates me. :D

If you decide to sell some to folks on the forum, and Nowicki gets some, let me know and you can toss min in with his! :)

-d
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That works for me...Let us know.

Larry
 
scottickes said:
I've actually been debating this in my mind. I'm going to just give some away to people that are local to me. As far as shipping them to others, I'm not sure if I want to do that. I'd have to find out how much shipping would cost me to do it. I know that anyone that wants some would happily pay the shipping costs, but I'm not sure how economical it is to ship steel across the country.

Does anyone have any ideas at what it would cost to ship steel rollers? Per pound costs?
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Hi Scott,
If you could see yourself boxing up some of that 52100 and shipping it, I would love to use my new power hammer on it to make knives. Even if you wanted a $1.00 a pound plus shipping to help pay for a little of your time to do this GREAT favor for us out here in knife world, I'll take at least two boxes.
PLEASE-PLEASE-PLEASE
It would be great to know I'm getting good 52100 to make knives with,
I'm afraid to say the bigger the better for bearing size, but with a 110# hammer I should be able to break down some good size bearings.
Thank you in advance, JD
 
RE: FAG bearings...
scottickes said:
...But, regardless of whether they are round balls or barrel shaped spherical rollers, both are 52100 steel. So get them and make some knives with confidence in the steel...
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Cool and thanks for the info! Incidentally, the bearings are a simple ball, thanks for clearing up the nomenclature.

Would the races be the same steel as the bearings themselves?
 
scottickes said:
Crushing applications are scary when it comes to knowing what kind of steel. The reason that bearings are sometimes case hardened is so that if a bearing begins to crack, the crack will stop at the softer (low carbon) core and prevent a sudden catastrophic failure.

Crushers have a lot of shock load going through them and are susceptible to fracturing rollers, so many times the bearings are not 52100. They are many times made of case carburized product.

Your chances of having 52100 are about 50%. If you know what the full part number is, I'll be able to identify them. Unfortunately, the part number is not on the rollers, but instead it is on the races. Do you have the races, or if you don't, can you find out from the person that you got them from what the full part number is?
Click to expand...

That job is up and running and I'm otfd! I didnt bother with the races,just my luck that's where the # is.I guess I could cut one in a cross section and etch it to see if it's a thick skinned fake-o.Thanks for the help Scott :thumbup:

Too bad I missed out on the ball mill job that would have been a high yeild for sure :)
 
Deweyknives said:
Scott, #572, #592A, #642D are the numbers I have here. One of the #572's had an eight digit number but I assume these are the important ones. :confused:

Hope you have a safe day on the road!! ;) :thumbup:
Click to expand...

Those are all case carburized bearings with a low carbon core and only a thin high carbon case. They will not work for making into knives. When you forge them, you'll lose the high carbon outer layers from decarb and the knife won't be able to be rehardened. I'm sorry to be the bearer of bad news, but I did save you a whole lot of hammer work!
 
J.Marsillo said:
That job is up and running and I'm otfd! I didnt bother with the races,just my luck that's where the # is.I guess I could cut one in a cross section and etch it to see if it's a thick skinned fake-o.Thanks for the help Scott :thumbup:

Too bad I missed out on the ball mill job that would have been a high yeild for sure :)
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This is a tricky thing to try. You could have a metallurgical lab cut it. It needs to be cut without developing heat. So it needs to be cut slowly with tons and tons of coolant. When you etch one that is cut this way, you'll see either a case all the way around (<<<bad for knives), or you'll see a consistent etch all the way across (<<<good for knives). The problem is, if you get it too hot when cutting it, you'll get a consistent etch with both types of steel.
 
Thanks for checking that out.:( I was going to HT the end and break it before I went too far :confused: but now I know for sure!! I can spend the time on something more productive!! Thanks! :thumbup:
 
Deweyknives said:
Thanks for checking that out.:( I was going to HT the end and break it before I went too far :confused: but now I know for sure!! I can spend the time on something more productive!! Thanks! :thumbup:
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You're welcome. I just wish I could have given you better news.
 
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