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scootermcrad

Posts: 6
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I've got this huge ball bearing that's 12 or 13 inches in diameter and about 3-inches wide. I was thinking of using it in the construction of a small bench-top wheeling machine. It's basically just like this one:


Any thoughts? Anyone done this? Sorry if this is repetative. Still doing a lot of reading and learning on here.

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pinkertonkap

Posts: 39
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That is a little large for a benchtop imho. It'd be fine on a floor model. I have some smaller bearings that would work great for a benchtop. Email me if you're interested in a trade. Pinkertonk@mchsi.com

In either case, you'll need to build a center hub. Most folks lock the center and let the bearing rotate on it's own bearings since they are normally VERY concentric. If the bearings are stiff you may want to put bearings in the hub but if you do, you'll have to deal with getting it concentric. Bearings are very hard and will be very difficult to true.

Kerry Pinkerton
Imperial Wheeling Machines
http://wheelingmachines.com

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oldgoaly

Posts: 220
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Scott,

As Kerry mentioned it's a little large, but you got it! and it's paid for! Now if you take a
look at Jim Bailie's ewheel album you will see he added delrin/teflon wideners to the edges,
this softens the hard edge also will work as sheilds or seals for your bearing. Also the bearing
should be very round, better than any old ewheel out there, plus it's hardened.
Good luck with your project!
tt

funny this is the second time i replied, other posts have not been showing up?
Hmmmmmm

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scootermcrad

Posts: 6
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Thanks for your replies! I was actually thinking that maybe it would be too small for a bench also... so a floor model may be in order. It's got some sentimental value, but since it's not being used for anything but dust collection, I may as well use it for something useful if I can. Figured on making a center hub for it to slip over and somehow lock to and then let it roll on it's own bearings. It was originally used for a HUGE horizontal water pump (about the size of a VW Beetle or even bigger!) and the shaft that it supported would have put 1000 times the punishment on it that I will. Was a little afraid that it wouldn't be wide enough.

I will look at the Jim's e-wheel album again to see what he did. I remember looking at it, but don't recall exactly what he did with the delrin.

Thanks for your input everyone! May as well give it a shot! Couldn't hurt! Worse case, I cut it off and adapt a standard wheel.

If/when I start building something I will take lots of pics!

Now... what lower anvils should I look at for a good mate to the bearing surface? Source? I'm just a hobbyist, so they don't need to be expensive, just useful. I can always replace them down the line when I'm not broke from building the rest of my tools!

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