Lead question?

[ckarren]

Thanks Rich! I have the 3X split ring and using 2X hooks. I don?t think I will get it to sink with the 3X hooks. They work fine it just don?t run as deep and lost my role.

That is all right my boys have confiscated them. New tub toys, you should have herd my wife last night when they asked if they could sleep with them.

Thanks

-Corey

[LaPala]

Glaucus: Those were some great research results you posted.

Can you provide a little bit more info please?

1. How many sinkers of each type did you make & are the figures an average?

2. What is the volume of the sinker? (I need this info so I can calculate the density of different leads)

I don't frequent this part of the forum, wish I did. The info you provided would make determining the lead needed for my cranks much much easier to calculate (rather than test ) Thanks

[Glaucus]

LaPala:

I didn't do a statistical analysis to find the average weights, but I checked a couple of times and there was a small variation of +- .1 grams, probably due to the sprue nubs. The bismuth was from store bought "bismuth sinkers", and I only have about 3oz. I had to cast a bismuth sinker, weigh it, then remelt and recast it, the weight remained practically the same each time (I reused the solder as well). I used an Ohaus triple beam balance (.1g graduations) to weigh all the sinkers.

I calculated the volume for the 1 ? oz sinker to be 3.8 cubic centimeters. I measured the volume indirectly using Archimedes' principle. I hung 3 sinkers by a thread from the balance, weighed them "in air" then "in water". The difference in weight was 11.4 g. 11.4/3=3.8. 3.8grams of water has the volume of approximately 3.8cc

For more info try these sites:

http://www.matweb.com/index.asp?ckck=1

http://www.magmaengr.com/books.html

http://www.lasc.us/CastBulletNotes.htm

http://www.nwtskirmisher.com/useful-casting.shtml

[LaPala]

Glaucus:

Thanks man, that was great help. I bookmarked the links... taht's a wealth of info there!! Guess I've be up all night reading tonite. Thanks again. Now I'm regreting not finishing my speed reading course.

[dlaery]

Here are some of my numbers.

I use a Do-It 16 oz Bank Sinker mold.

My scale is electronic counting scale that has a resolution of 0.0001

That would be .04536 grams.

My test was very soft pipe lead.

1.0110lbs

Pure Bismuth .9238

75%Bismuth 25% Tin .8429

58%Bismuth 42% Tin .8010

94%Lead, 4%Antimony, 1%Tin .9607

Then I bought some printing letters. I melted it down into ingots. It seems very hard. .8918