Anyone Have Experience With Ergotron LX Wall Mount Monitor Arm? Concerned with it on one stud.

alpharalpha

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Nov 10, 2017
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I just set this up and am uncomfortable with it all on one stud; arm is heavier than I anticipated (13.5lbs) and though monitor is at low end of weight limit (12.5lbs) considering extends outwards up to 33" seems like a lot of force on single stud; wondering what other's experiences have been; thinking of putting board up spanning 3 studs then drilling thru center of board and screwing logner lag bolts into existing mount holes in stud; putting some into the other 2 studs as well, just to give that single stud some help; Have it mounted now--without monitor for the moment--and it feels solid; but this is my first experience with a long monitor arm like this. This is it: https://www.ergodirect.com/17794-ergotron-45-383-026-lx-hd-sit-stand-wall-mount-monitor-arm.html
In the pic the horizontal holes are from my using an awl to find edges of stud, have electric finder this just takes the guesswork out of finding center, I will sand and paint over it; also I originally mounted it a bit lower so that's the bottom hole; it cracked the textured surface that's over the sheetrock, made me a bit nervous that I might've split the stud as well; M8 80mm lag bolts are pretty large for 2" stud (1.5" actual) Anyone have experience with using one of these or similar mounts and would you suggest beefing up the support or is it good in the one stud?

IMG_0417.JPG
 

alpharalpha

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I have three of those - two for monitors and one for keyboard/mouse. They're mounted to a brick wall though, so there's no worries about the wall being strong enough.

If you want more support, perhaps try using a wall track mount (https://www.ergotron.com/en-us/products/product-details/97-091). That would spread the load over more area.
I've considered that, but would still all be on the same stud. It seems to be pretty firmly in there; 5/16 coarse thread does have a good bite--if stud isn't split. Tom' I'll install monitor, see how it goes; think in the long run I'm going to be more comfortable with a board spanning 3 studs; though that may just be my initial heebejeebies of an extended mount on one stud; will keep close eye on it for now.
 
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Assuming you lined it up properly to the stud and drilled proper pilot holes for the lag bolts, it's fine. About the only issue I can foresee is constant movement of the arm maybe breaking down the drywall under it a bit, but that's easily resolved by retightening the lag bolts.

Putting up a horizontal board to span stubs really won't do much I believe. Any forces on the arm will still be focused at its base and won't really spread across the board. At best it might protect the drywall underneath some, but the same could be accomplished using a small flat square/circle of wood under the existing mount (plus maybe longer lags to compensate depending on the thickness of the wood piece).
 

Nobu

Supreme [H]ardness
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The "correct" solution would be to cut the drywall out between the studs and put a board between the two studs to carry the load of the side that's currently only supported by drywall. Then reinstall the drywall, paint, etc., and drive the lag screws into the board.

Or if you don't mind seeing a board, you could screw the board to the studs on the outside of the drywall, and paint/stain, etc..

Edit: Mmm, didn't see the photo. Yeah not much you can do there. As said, spanning two would only help a little with vertical force, mostly helps with horizontal torque.
 
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GreenLaser

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Sep 24, 2020
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Ive mounted a few heavy monitors and speakers to single studs with zero issue. Make sure you drill proper size and depth pilot holes for the ~2 inch lag bolts. I usually do the important top one first install that bolt and tighten till the base is snug but will still rotate on the wall. Then level the base and locate mark for the second hole, rotate the base out of the way then drill second pilot hole and finish the install. Tighten the TOP bolt snug then the bottom remember that the top one holds almost all the weight so don't crush the bottom bolt in just tighten good and snug without drywall damage.
 

Tol

Limp Gawd
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Jan 5, 2005
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246
I've got the HX wall mount holding up my much heavier 48" oled and haven't had any issues. I don't move the screen around often but I've probably done so 20 times since I hung it up there and I've never been worried.
 

alpharalpha

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Nov 10, 2017
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I've got the HX wall mount holding up my much heavier 48" oled and haven't had any issues. I don't move the screen around often but I've probably done so 20 times since I hung it up there and I've never been worried.
Ok, and you've got it mounted to single stud 2x4; is arm extended as well?
 
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