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Old October 10th, 2009, 12:15 PM   #1
Plato2k5
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Default tire carrier hindge...

Could one use a Unit bearing with a 1" bolt to use as the spindle for a tire carrier??

http://www.fastenal.com/web/products...0474558&ucst=t

Put one on the top and bottom so it keeps things aligned?
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Old October 10th, 2009, 12:16 PM   #2
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I got mine from rockstomper.com They are supposed to be able to handle a lot of ###.
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Old October 10th, 2009, 01:53 PM   #3
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I have seen a lot of people who say they have failed after a few years causing the tire carrier to fall off while driving down the road. They crack from stress and snap. I really would hate to have that happen.
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Old October 10th, 2009, 02:49 PM   #4
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Quote:
Originally Posted by Plato2k5 View Post
I have seen a lot of people who say they have failed after a few years causing the tire carrier to fall off while driving down the road. They crack from stress and snap. I really would hate to have that happen.
Thats why I went with this one.

http://www.rockstomper.com/catalog/pieces/hinge.htm

I am only running "32s but I am adding a Hi-Lift to the carrier maybe soon but that shouldn't be a problem.
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Old October 11th, 2009, 11:35 AM   #5
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that is the one that I have seen many pots where they have failed. I'm guessing the spindle is not heat treated for strength? Than again I don't think it would matter since when you weld your changing the structure of the steel anyhow.

Thats why I'd like to just bolt it together....but I'm sure I have not seen the way I want to do it for a reason....
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Old October 11th, 2009, 11:47 AM   #6
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go to a tractor supply store. walk into the trailer section. they have small trailer spindles im thinking about trying out
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Old October 11th, 2009, 12:06 PM   #7
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I don't have one of those near me. I can get this things from work for about $5. I just do not want an unsafe design to worry about.
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Old October 11th, 2009, 12:07 PM   #8
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i dont know how much i would trust that thing there
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Old October 11th, 2009, 12:39 PM   #9
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the one thing I like is if the bearing feails, you still have a bolt that will hold it all together.
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Old October 11th, 2009, 12:46 PM   #10
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that is true. but what kinda load is that good for?
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Old October 11th, 2009, 12:53 PM   #11
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I do not know. I'd have to check the specs while at work.
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Old October 11th, 2009, 09:08 PM   #12
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well when i made mine I used 2" round and had my buddy bore a .756 hole through it. I used a 3/4" bolt with a fence gate bearing on the top. it has a 33" spare, high lift, 2 gerry cans and the bolt has about 1/4" flex when it is open all the way. it has been this way for 7 years and is still fine. I if i added an upper mount to the bumper it would not move at all.
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Old October 12th, 2009, 07:35 PM   #13
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its not going to be vary strong at all, its cast Iron.
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Old October 13th, 2009, 06:58 PM   #14
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The cast iron will fail.

We stopped using that design in it's proper application because the cast iron failed.


I would use a taper bearing, like the trailer wheel bearing.
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Old October 14th, 2009, 09:34 AM   #15
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Quote:
Originally Posted by Plato2k5 View Post
that is the one that I have seen many pots where they have failed. I'm guessing the spindle is not heat treated for strength? Than again I don't think it would matter since when you weld your changing the structure of the steel anyhow.

Thats why I'd like to just bolt it together....but I'm sure I have not seen the way I want to do it for a reason....
Think about this for a minute, the trailer spindle Rockstomper uses is for a 2500# trailer axle. Divide that in half and you have 1,250# capacity, do you think you can exceed load limit of 1,250 pounds on your swing-out to cause the spindle to fail? Where folks have had a problem with this style is having the hold close latch open while traveling and the weight of the loaded carrier combined with leverage bends the spindle.

Make the latch so it cannot come open during travel (should do anyway) and add a double sheer to spindle by attaching it at the top as well. I have been using the Rockstomper style on customers bumpers for years without fail.
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Old October 14th, 2009, 11:01 AM   #16
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They don't bend, they shear off.
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Old October 14th, 2009, 11:04 AM   #17
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Quote:
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They don't bend, they shear off.
Or they could shear off, hence adding an attachment point at the top of the spindle seems simple enough

I also use this hinge, pricey but super strong with a 2000# capacity
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Old October 14th, 2009, 11:11 AM   #18
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Or you can have new spindles made of billet instead of these crappy forged ones.
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Old October 14th, 2009, 11:16 AM   #19
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i used the rockstomper one. I cannot wait till it sheers off and my shit goes flying....

great!

I wonder if anyone else has had this problem or is just maybe a defect that has only occured a few times?

I am going to do what Ironman recommended and put a top attachment post that goes on the top

thanks for the idea ironman
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Old October 14th, 2009, 11:19 AM   #20
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We have fixed around 8 bumpers that have sheared off like the picture above. So probably around 5% failure rate. If you don't already have it, you should put a block of something for the carrier to rest on when it is closed. This gets rid of of the shake and additional stress on that spindle.
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