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Blacksmithing and Metallurgy Hand-wrought manufacture of metal objects, extracting metals from their ores, or purifying metals and casting useful items from the metals.

Blacksmithing and Metallurgy

Babbitt or Lead?


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  #11  
Old 12-21-2016, 01:08:46 AM
5hpGalloway 5hpGalloway is offline
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Default Re: Babbitt or lead?

Not that I've seen a few of them are beet up real bad. some of them are the size of a muffin and the rest are in different shapes no markings
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  #12  
Old 01-26-2018, 01:14:34 PM
DBH DBH is offline
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Talking Re: Babbitt or lead?

All old time babbit is lead based. Some has more tin than others. If you are re babbiting a Little Giant power hammer you should use a softer babbit has the hard babbit will tend to break up from the pounding.

DBH

---------- Post added at 11:14:34 AM ---------- Previous post was at 11:13:25 AM ----------

Sorry for the bad spelling, I meant BABBITT! LOL
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  #13  
Old 01-26-2018, 05:31:12 PM
Pete Spaco Pete Spaco is offline
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Default Re: Babbitt or Lead?

I learned a lot from this page:

http://www.babbittrepair.com/babbitt...babbitt-chart/

Mostly, I was surprised by the SMALL difference in melting temperatures across the whole range of babbitts reported in their chart. 433 to 479.

Note that pure tin melts at: 450F
And that pure lead melts at: 622F
1167F for Antimony,
and 1984F for copper.

If there's a "take-away" for me:
Unless one has some really sophisticated temperature measuring capabilities, one needs some other way to determine the alloy.

Might be best to "bite the bullet" and buy new babbitt so you are sure.

From my experience, there's a lot of work entailed in rebabbitting a bearing, so the cost of materials becomes minor if you have to do it over.

Pete Stanaitis
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Old 01-26-2018, 06:21:05 PM
dalmatiangirl61 dalmatiangirl61 is offline
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Default Re: Babbitt or Lead?

I wonder if a plain lead test kit could be used to determine if the babbitt is lead based, or tin based?
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Old 01-26-2018, 07:23:43 PM
Thaumaturge Thaumaturge is offline
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Default Re: Babbitt or Lead?

Quote:
Originally Posted by Pete Spaco View Post
Note that pure tin melts at: 450F
And that pure lead melts at: 622F
1167F for Antimony,
and 1984F for copper.
Quite common for alloys to melt at lower temp than the pure metals. Know it is so for 60-40 lead-tin electronics solder, or even the 50-50 sheet metal and plumbers solder. Don't recall specific temps, but know it is much lower than pure lead.
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Old 01-27-2018, 12:12:50 AM
Bill Hazzard Bill Hazzard is offline
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Default Re: Babbitt or Lead?

Quote:
Originally Posted by dalmatiangirl61 View Post
I wonder if a plain lead test kit could be used to determine if the babbitt is lead based, or tin based?
Tin based Babbitt will ring when struck, lead based just has a thud when struck.
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Old 01-27-2018, 11:05:19 AM
Pete Spaco Pete Spaco is offline
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Default Re: Babbitt or Lead?

Is there something that is not "off topic" but "just beside topic"?

Just a few days ago, a friend who casts his own bullets told me about a method of testing bullet hardness using pencils, the "Staedtler Scale". This came as a result of discussing the usefulness of wheel weights for bullet making and the variability of wheel weight material.

See this:
http://castboolits.gunloads.com/show...s-with-pencils

I know this isn't directly related to babbitt, but it might have some utility.

Pete Stanaitis
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Old 01-27-2018, 02:08:00 PM
ronm ronm is offline
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Default Re: Babbitt or lead?

Quote:
Originally Posted by 5hpGalloway View Post
Not that I've seen a few of them are beet up real bad. some of them are the size of a muffin and the rest are in different shapes no markings
And some of them are a work of art. . . I will have to be pretty desperate for babbitt before I melt these.
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  #19  
Old 01-27-2018, 02:23:33 PM
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Default Re: Babbitt or Lead?

^ Yeah those belong in the 'guy curio cabinet'.
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Old 01-27-2018, 04:18:38 PM
Andrew Mackey Andrew Mackey is offline
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Default Re: Babbitt or Lead?

Clean a section of your ingots to bare metal. Try to scratch with your fingernail or a piece of soft wood, like a toothpick. if it scratches, chances are it is lead. Virgin lead is very soft. Babbitt is harder. The more tin in the metal, the harder it will be. The hammer test is a good one. If you strike with a small hammer, a dull thud is all you will get from lead. If you use the ball end of a ball-peen hammer, pure lead will dent deeply. Babbitt will not.
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