[SEL] Babbit metal composition please

[peter ogborne]

Peter .....do a Google on ''The Hoyt Book on the Lined Bearing'' . I see 
there are some copies available ,7th Edition . I have the 14th Edition 
,tells all with some interesting info on jigs etc. I was kindly given mine 
by a tech school instructor many years ago .
----- Original Message ----- 
From: "Peter Lowe" <plowe at exemail.com.au>
To: "ATIS" <sel at lists.stationary-engine.com>
Sent: Tuesday, January 08, 2008 8:17 PM
Subject: [SEL] Babbit metal composition please


> Hi All
>
> We have been through this before in various forms, but I ask a question 
> from
> THOSE WHO KNOW please.
>
> I am about to pour the bearings for my vertical R&V, these are not split
> bearings but hollow cylindrical bearings with no adjustment.
> I have melted out the old metal and I am assuming that it is not the
> original 103 years old Babbitt, knowing the condition of the flywheels and
> crankshaft.
> Should I assume that, well to be safe I will !!
>
> Now what composition of Babbitt should I use, should I trust the old
> bearings and re-use the metal or go with new clean stuff.
> I have a full bar of "copper free" Babbitt that was used on the steam
> engines at the sugar mill where I used to work, it was used on the gland
> packing on the engines, is this too soft. I have no idea what composition
> the new stuff I have is, only that it is Copper Free, but it is not as 
> heavy
> as the stuff melted out of the old bearings. Does the old stuff have too
> much lead in it and too soft?
> I have used the Copper Free metal on my R&V Triumph Line engine and is 
> seems
> OK. Remember these are not under load and only run at a few shows, but I 
> do
> not want to have to pour them again.
> Modern oils are also better these days.
>
> I do not mind going out and buying a new bar of Babbitt if the more
> knowledgeable members here think I should.
> There are a few on the LIST who do know so please do not sit on the fence,
> guide me please either on or off the LIST.
> plowe at exemail.com.au
>
> This was from Wikipedia
>
> 90% tin 10% copper
> 89% tin 7% antimony 4% copper
> 80% lead 15% antimony 5% tin
>
> This is from Wikipedia looking under White Metal
>
>       % Sn  % Sb  % Cu  % Pb Applications
>      93 3.5 3.5 - Light and medium IC engine big end bearings
>      86 10.5 3.5 - Light and medium IC engine main bearings
>      80 11 3.0 6 General purpose heavy bearings (lead increases 
> plasticity)
>      60 10 28.5 1.5 Heavy duty marine engine bearings, electrical machines
>      40 10 1.5 48.5 Low cost, general purpose, medium duty bearings
>
>
>
> What should I do mates.
>
> Regards
> Peter Lowe
> R&V Engine Registrar
> Australia
> Ph: 61-266453455
> http://www.oldengine.org/members/plowe/rv-engines/rvpage.htm
> http://www.oldengine.org/members/plowe/rv-engines/rv-register.htm
>
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