Let's do a little math. Let's say, just for example, that the threads on your ball are 1/2". They "should" be larger than that! But just for this example, let's say 1/2". And, let's assume that the thread steel and your 3/8" pin are of relatively equal strength and hardness. Simply going down in size from 1/2" to 3/8" would decrease the capacity of your ball by almost 44%!!
The cross sectional area of 1/2" = 0.19635"
The cross sectional area of 3/8" = 0.110447
.110447/.19635 = .562499, or 56.25%. You lose almost half your strength just by decreasing by that amount.
...Now, what's the thread size that's on a ball? 3/4"? 1"?
You'll lose a LOT of capacity by going a smaller size. Then add to that what JMOR was saying, that having any slop in the ball will simply have it wallowing around enlarging your hole, and putting unnatural stresses on your ball that it simply was not designed for.
Now, if all you're wanting to do is move your small boat or lawn trailer around the yard, you might could get by with something like that. However, I much prefer Adirondack case guy's idea!
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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