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Tractor Talk Discussion Forum

Brass Bushing problems?

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John in CT

01-13-2005 18:52:08




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I decided to buy some store bought brass bushings to tighten linkages up. I drilled the hole out to the brass bushing O.D. My problem is that bushing is a hair loose, what should I do? I am thinking Locktight (Red or blue), solider (sp) like a plumbing pipe or maybe smuching the bushing length wise so it will be a little wider. Thanks!!!




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RP

01-16-2005 13:32:53




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 Re: Brass Bushing problems? in reply to John in CT, 01-13-2005 18:52:08  
You can knurl soft metals like brass, bronze and aluminum with two course metal files. Lay one file on the bench, set the bushing sideways (so it can roll down the file) on the end of the file nearest you. Now stack the other file on top, lean hard on the top file and roll the bushing to the other end of the bottom file. You can do this a couple times and it will raise a bunch of little teeth across the bushing. You can get it to where you have to press it in the hole this way.

rp

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NC Wayne

01-14-2005 19:46:28




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 Re: Brass Bushing problems? in reply to John in CT, 01-13-2005 18:52:08  
Remeber next time, rule of thumb is normally .002" undersize per inch of OD for a good press fit. Now as for your current situation, like one post suggested you can knurl the OD of the bushing to tighten it up. You can also take a sharp center punch and peck around the iside of the hole and accomplish nearly the same thing, the only thing about this way is it doesn't "shrink" the hole around 100% of the OD like knurling the bushing would swell it. If you want to use Lock-tite try the green 680, that's for cylindrical bearings and bushigs. You can also use some type of epoxy like JB Weld, Devcon, etc and coat the bushing before putting it in. Any of these things will help but depending on what's happening with whatever goes through the bushing and how much force it applies to the bushing as to wether any of these things are really gonna do any good.

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Jim@concordfarms.

01-14-2005 04:21:14




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 Re: Brass Bushing problems? in reply to John in CT, 01-13-2005 18:52:08  
Like Davis said, knurl it or Loctite it. I'd use Loctite 290. It's super strong and made for cylinderical uses. Just prep the surfaces w/ alcohol, or acetone. But if it's an oil impregnated bronze bushing, I don't think Loctite would work. If that's the case, you might try pricking the O.D. of the bearing with an automatic center punch. I've done this a few times on new fabrication where the reamer cut a few tenths over and it really helps the bushing grab hold. Jim.

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Davis In SC

01-13-2005 19:10:14




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 Re: Brass Bushing problems? in reply to John in CT, 01-13-2005 18:52:08  
You could knurl OD if you have access to a lathe, or Loctite makes a product that is anerobic, but has a metal powder in it. I think it is good for up to 20 thou. gap. Not sure of product number. Bushings are brittle, trying to mash it might crumble it up.



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brtx

01-14-2005 16:36:53




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 Re: Brass Bushing problems? in reply to Davis In SC, 01-13-2005 19:10:14  
it may help if we knew what linkages you were working on.weight or rotating could be reallt important



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