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February 16, 2012, 08:35 PM | #26 | |
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The benefit of cast iron is that you can get it manufactured in China with less screwups. |
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February 16, 2012, 10:18 PM | #27 | ||
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Not so sure
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aluminum - 69 million pounds per square inch Gray cast Iron 130 Wrought Iron or Steel 200 So, for the size, iron and steel are two to three times as strong as aluminum. However, Aluminum is lighter than steel by a factor of about 2.8. So Aluminum can be actually stronger (by weight) than steel. I haven't found a handy source to compare the abrasion resistance of the three metals under discussion, but I thinkg everyone knows that cast iron is more abrasion resistant than aluminum , so will last much longer. If anyone has comparative abrasion data, please contribute. How do you define strength? For my own self, I prefer my metals ferrous, whether cast or forged, but do recognize that aluminum does not rust, is cheaper and lighter. So I believe either choice is valid, so choose your poison and go in peace. Lost Sheep |
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February 17, 2012, 10:50 PM | #28 | |
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I'm not saying you will ever break an aluminum press, just that the aluminum one WILL break before a cast iron one, barring abuse. Chances are the ram going up and down will wear out the aluminum before it ever reaches its fatigue limit, long before the ram wears out the cast iron unit... Show me an aluminum instrument that has any chance of lasting generations like many cast iron ones HAVE. |
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February 18, 2012, 12:42 AM | #29 |
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This is my Lee Deluxe set up. As I mentioned I have it such that the primers come out the bottom into a garbage bin. It may not be as good as the Classic, but if it lasts be a few solid years while I cut my teeth at reloading I'll be happy!
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February 18, 2012, 01:00 AM | #30 |
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ah... my problem is that my primers dont go into the holes in the press base... If I keep the primer arm in they do, but in decapping many at a time, it gets gritty and starts to stick then flies out onto the floor (the primer arm).... I guess going slow would help, but me no likey go slow!
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February 18, 2012, 01:05 AM | #31 |
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A bunch of those deluxe turrets have been in operation for quite a few years, meatsaw.
I doubt you'll have to worry about wearing it out unless you willfully abuse it. |
February 18, 2012, 01:14 AM | #32 | |
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February 18, 2012, 01:23 AM | #33 | |
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February 18, 2012, 01:33 AM | #34 | ||
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February 18, 2012, 08:00 AM | #35 |
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Well,I got the press,4 hole and this one looks to be made of cast iron..I do know it is heavyer than the other one is..
And I could give a rats ass what it is made of as long as it works..And works like it is suppose to..Thanks for all of your infomation filled replies... GOD BLESS AMERICA.....John |
February 18, 2012, 11:44 AM | #36 | |
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February 18, 2012, 01:00 PM | #37 | |
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Evidence?
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Would you bet your Diamondback against my Judge on the accuracy of your statement? Lost Sheep |
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February 18, 2012, 03:25 PM | #38 | |||
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Nobody uses aluminum when ultimate strength is required, because "inch for inch" its hard to find a weaker metal. A 1"x2" bar of cast iron 12 inches long would weigh 6 1/4 pounds vs aluminum the same size would weigh 2 1/3 lbs, but to get the aluminum bar to weigh the same as that 1"x2"x12" bar of cast iron, the aluminum bar would need to be 32" long... thats nearly 3 feet of aluminum to make the same "pound for pound" weight of one foot of cast iron.... The fact of the matter is we are not talking about the "pound for pound" strength of cast iron vs aluminum, we are talking about the strenght of lees' cast aluminum press vs their cast iron press, and the cast iron press is stronger in every way. Your original statment Quote:
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The classic press has a cast iron base because it needs the EXTRA STRENGTH of cast iron to handle the additional leverage required for the bigger cartridges the classic can handle. Last edited by dacaur; February 18, 2012 at 03:31 PM. |
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February 18, 2012, 04:29 PM | #39 |
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In terms of weight aluminum wins. "Pound for pound" is a comparison of strength per weight. In terms of the base of the press weight really doesn't matter. Its bolted to a bench. So "pound for pound" strength doesn't really mean much. What does mean a lot is strength per volume. If you cast a press and are restricted to 4 cubic inches then the 4 cubic inches of iron is going to be a lot stronger than 4 cubic inches of aluminum.
But in the end what difference does it make to you? I personally will only be using my deluxe kit for 40, 45, and 223. Aluminum will work fine in its intended use. decaur -- good post!
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February 18, 2012, 04:48 PM | #40 |
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Grey cast iron has a tensile strength of about 50,000 psi. That would be the most likely type used for a press.
Depending on the exact type of aluminum and how it is hardened or annealed, varies widely. My guess is that press bases are made of 6061-0 or 6061-T4. 6061-T6 is a lot more expensive, but a lot stronger (comparable to grey cast iron). O has a fairly low tensile strength, T4 more so, at about 18,000 psi and 30,000 psi respectively. Not sure how that would translate into a press base, but I do know that over time the aluminum base of my Lee Turret (the original 3 hole design) began to flex and crack and is no long suitable for use as a press. My RCBS Rockchucker, though, is close to, if not over 50, years old, and has had a similar number of rounds run through it. Its base is still the same as it always was.
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February 18, 2012, 10:13 PM | #41 |
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The whole point of online forums is the exchange of information. If someone is going around giving out wrong information, they need to be advised and the correct info posted.
Sure it would save a whole lot of forum space to just "let it go". I know I'm right an thats all that matters, right? Wrong. The problem with just letting it go is that then you have X number of people who see the incorrect info, see that no one disputed it, and now thats "good" info in their mind, that they are going to one day pass on to someone else, and so on and so forth. It becomes a vicious cycle and has got to be stopped whenever its seen, even though it does at times detract from a thread, its a necessary part of online forums..... |
February 19, 2012, 12:30 AM | #42 | ||
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I was just staring at my Dillon (aluminum) and my LCT (cast iron) and I believe that the design of the LCT really doesn't put much stress on the base. Last edited by totaldla; February 19, 2012 at 12:43 AM. |
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February 19, 2012, 12:44 AM | #43 |
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You're right, I was thinking A48, which is the kind often used for machine tool bases, lathe beds, and the like.
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