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Old 06-01-2017, 10:26 PM
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arizonian arizonian is offline
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Default Custom Ball Joint Sockets

My brother-in-law has a 2003 Daewoo that goes thru lower control arms every couple of years. Last time they went out, I offered to make up some replacement bushings using ball joint rod ends. A couple of days of machining and this is what came out. I'm not a very good machinist, so I didn't get the finish that I wanted. Everything does fit fairly snugly, so I'm not complaining too much.

Photo 1: The source of the problem. One of the bushings came completely apart. The center is lost out there somewhere.

Photo 2: The "family" of parts

Photo 3: Shot of the interior. I ground a special bit for the small boring bar to cut the groove. Part of my math is visible on the outside wall

Photo 4: My blueprint via polishcad. I didn't stick exactly to the print, made a few adjustments for ease of machining, like leaving the bottom lip off.

Photo 5: My helpers, Evan, and his little brother, Evan


Now the question that comes up: Are these ball joints going to hold up? I ordered them from McMaster-Carr, and found out just yesterday I can get seals also, so they are on order now. The big joint has a 1" thru hole, and the little joint has a 3/4" thru hole.
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  #2  
Old 06-02-2017, 12:16 AM
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gimpyrobb gimpyrobb is offline
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Hmmm
For some reason I only was interested in the last pic. Even is a good help with my projects too.
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Old 06-02-2017, 12:18 AM
Samcord Samcord is offline
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I think you may learn why they make them with rubber very soon.
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Old 06-02-2017, 12:30 AM
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Quote:
Originally Posted by Samcord View Post
I think you may learn why they make them with rubber very soon.
I'm not worried about road noise, it's not my car.

Lee, on the other hand,...
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Old 06-02-2017, 12:36 AM
Samcord Samcord is offline
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I'm only guessing, but vibration, tire wear, and handling come to mind also. Hey, I love learning by trial! Keep us informed.
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Old 06-02-2017, 07:58 AM
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The bushings on my '67 Chevy are all steel from the factory. I wouldn't overly worry about the noise.
A lot of times the fix is simply to get a new part, rough up the rubber and fill the voids with urethane.
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Old 06-02-2017, 08:01 AM
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we ran that type of thing in race cars for years,as far as i know the NASCAR guys still use them,they did 15 years ago,for sure.
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Old 06-02-2017, 07:15 PM
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I imagine the manufacturing cost of the rubber ones would be way less than steel.
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Old 06-03-2017, 07:19 AM
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I think I would put that fix in the "addel dew it" category. (the exact right amount, in the south)

I have used ball ends on several street rods and a few race cars, though not in this exact position, no problems, except for the occasional squeak and squak.

You seem to be in the right weight/load range for the task, I would not expect any problems. I'd lube it up, generously ,and drive it like I stole it.
Nicely done.

RED
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Old 06-03-2017, 06:13 PM
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Addel dew it! Thanks, RED caddy.

Clive, yes, they were expensive compared to the stock control arms, but getting two years or less out of a set of bushings before they went south doesn't make sense. I think one set lasted six months.
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