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Need some help from the auto-rotating monitor experts...
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Le Chuck:

--- Quote from: kahlid74 on March 09, 2012, 07:07:36 pm ---The only thing I'll warn you about is using a lazy suzy in this fashion can produce unknown results.  Those who have used it should know it's reliability but you are using it on a place it's not meant for, which Topjimmy stated before.

--- End quote ---

If you use a table top lazy susan you're right but there are thousands of bearings out there that are designed for rotational movement along a vertical plane.  The issue is that some lazy susans are thrust bearings (horizontal loads) and some lazy susans are radial bearings (axial loads).  Turntable bearings and slewing bearings do the same thing but are meant for industrial rather than household applications and are poured steel or iron rather than stamped aluminum yet are still commonly refered to as Lazy Susan bearings as well.  I did mention looking for vertical stress test data on table top lazy susans (thrust bearings) in an earlier post but further analysis leads me to conclude that this isn't necessary given the amount of affordable bearing solutions on the market, I have a good sized radial bearing lazy susan in the mail for $11 shipped.  What makes the "lazy susan"nice is that you don't need an axle as you have two fixed planes, but you sacrifice a lot of strenth doing that.  You can get flanged radial bearings in a 3/16 in diameter that have a dynamic capacity of over 300lbs.  They only go up from there, the trick at that size is finding an axle you can support the tv from.  Jump that up to 3/4 inch and you've solved the support problem for the axle and the bearing can support a midsized pachyderm. 

This was not meant as a rant but merely to clear the air about bearing application in rotation since I notice a lot of folks have written bearing solutions off and I think that they have a lot to offer. 

<significant edits for clarity>   
nitz:
Thanks for all the help guys, I'm feeling a lot more confident about putting this together now. :cheers:
kahlid74:

--- Quote from: Le Chuck on March 09, 2012, 10:19:12 pm ---
--- Quote from: kahlid74 on March 09, 2012, 07:07:36 pm ---The only thing I'll warn you about is using a lazy suzy in this fashion can produce unknown results.  Those who have used it should know it's reliability but you are using it on a place it's not meant for, which Topjimmy stated before.

--- End quote ---

If you use a table top lazy susan you're right but there are thousands of bearings out there that are designed for rotational movement along a vertical plane.  The issue is that some lazy susans are thrust bearings (horizontal loads) and some lazy susans are radial bearings (axial loads).  Turntable bearings and slewing bearings do the same thing but are meant for industrial rather than household applications and are poured steel or iron rather than stamped aluminum yet are still commonly refered to as Lazy Susan bearings as well.  I did mention looking for vertical stress test data on table top lazy susans (thrust bearings) in an earlier post but further analysis leads me to conclude that this isn't necessary given the amount of affordable bearing solutions on the market, I have a good sized radial bearing lazy susan in the mail for $11 shipped.  What makes the "lazy susan"nice is that you don't need an axle as you have two fixed planes, but you sacrifice a lot of strenth doing that.  You can get flanged radial bearings in a 3/16 in diameter that have a dynamic capacity of over 300lbs.  They only go up from there, the trick at that size is finding an axle you can support the tv from.  Jump that up to 3/4 inch and you've solved the support problem for the axle and the bearing can support a midsized pachyderm. 

This was not meant as a rant but merely to clear the air about bearing application in rotation since I notice a lot of folks have written bearing solutions off and I think that they have a lot to offer. 

<significant edits for clarity>   

--- End quote ---

Le Chuck, can you give me some examples/links to Axis/Bearings able to hold 30Lbs?  I've been doing some rough looking in my area and haven't found what I'm looking for yet.  Then again I'm new to this stuff so I'm not 100% sure what I'm looking for.  I would PM for this but I thought it would be good for others searching on this to find it.
Le Chuck:

--- Quote from: kahlid74 on March 12, 2012, 09:55:10 am ---Le Chuck, can you give me some examples/links to Axis/Bearings able to hold 30Lbs?  I've been doing some rough looking in my area and haven't found what I'm looking for yet.  Then again I'm new to this stuff so I'm not 100% sure what I'm looking for.  I would PM for this but I thought it would be good for others searching on this to find it.

--- End quote ---

Sure thing.  Depends on what you're wanting to do and how you're wanting to hook up so I'll put a few solutions:

Axle based solution:  Both of these and pretty much any like them have a tolerance of several hundred pounds.

Flangette Collar Bearings - These are great because they have set screws in the collar so your axle doesn't just pull out.  Available in two bolt and four bold models. (tolerance of over 7 KNs on this model!)   

Pillow Block Bearings - similar to the above but they mount differently.  Many of these are not self lubricating so come with a grease zerk.  For arcade use you'd likely never have to lubricate.

There are also regular collar bearings and rod end bearings and all kinds of others that come in a variety of sizes a good price.  Just watch for key words like ceramic and surgical because prices will climb exponentially. 

Turntable based solution: Much lower weight tolerance but still around a 100 lbs or so, a data sheet should be coming with the sample I ordered and I'll update.

Aluminum Turntable Bearing - Right now this is the only axle free solution that is remotely affordable (various sizes available).  When I was in Germany slewing rings in the 100mm to 200mm range were commonly available at Einhaeupl's but they are harder to come across in the states it seems.  I've heard that you can get them at tractor supply stores so hit that up if you have one near by.  Other than that I'll keep searching for a steel supplier as you lose a lot with aluminum. 



TopJimmyCooks:

--- Quote from: Le Chuck on March 12, 2012, 03:31:22 pm --- . . . a data sheet should be coming with the sample I ordered  . . .

--- End quote ---

Got a rotating monitor project coming up?


I would have used that VXB turntable bearing if I had known of it before going with the LSB.  That is awesome and a great price. 
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