Hinge weight capacity for TV mount
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  1. #1
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    Default Hinge weight capacity for TV mount

    Capacity Question: From hinge packaging - Door Width 18" - 30 lbs., 24" - 24 lbs., 30" - 18 lbs.
    I'm using this pair of double hinges to mount a TV which is 36" wide. Both hinges will be in the center horizontal & within a 7" space vertically. From the above weights what would be the maximum weight for the TV? I assume that the weight will be much different from the package info for a door. All other parts used for this TV mount are rated at 100 lbs. which is over rated. Over rated is good. Thank You for Help here!
    PS: I'm thinking the size of the TV and the fact that the hinges are centered Vertical and Horizontal will raise this weight. I would like to see better than 9 lbs. per hinge or 18 lbs. total, that sounds ridiculous for a hinge!

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    You have not given the critical dimension, which is the distance of the TV's center of mass to the wall on which you will mount the hinges. Compare that distance to 1/2 the door width on the hinge packaging. I.e., if the TV's COM will be 9" from the wall, use the 30lb load rating.

    And I have to ask: Given that they are dirt cheap, why aren't you using a store-bought tilting/swiveling TV mount?

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    1. Firstly store-bought tilting/swiveling TV mounts are garbage. I bought one and it will not even hold 20% of the rated weight.
    2. The hinges will be mounted directly to the TV back. This will be at the end of full extension drawer slides that themselves are rated at 100 lbs..
    3. So with this critical dimension being very small does that mean the rating would be better than the 30 lbs.?

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    Yes, as sfriedberg points out it's the leverage the mass is exerting that influences the hinge capacity. In your case, you could support ~50lbs or so without risk.

    Make sure the pivot points of both hinges are aligned as close as possible to minimize binding. Also, if you swivel the TV a lot you will likely be putting a torsional load into the extending slides, and they're not designed for that (usually). A safety chain or other fall protection might be a good idea.

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    Thank You Milland & sfriedberg. I understand hinges a bit more now. I will carefully consider your comments as I finallize my design.

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    There are good, bad, and indifferent commercial mounts. I bought one a few years ago for a 50" screen that weighs a good 30 or 40 pounds- the tv- and my swivel pivot mount could easily handle twice that weight. I just paid a bit more for it. There are tvs out there with 82 " screens that weigh 80 to 100 pounds, and they make swivels for them.
    This is a case where I would not try to re-invent the wheel.

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    I built my own T.V. mount as well. I didn't like the look of wall mounts that were available. I lag bolted a short section of aluminum unistrut onto the ceiling. Then welded a tapered roller bearing setup onto a small truck that rides in the strut.

    Seems to work pretty slick. Also when the kids were little I put a couple of eye hooks on the stut and had a swing for them in the house. LoL it was more popular than the T.V.

    Nic

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