1/2" Carriage Bolt Loading?

[Soundguy]

Re: 1/2\" Carriage Bolt Loading?

That's what cap or acorn nuts are for!

Soundguy

 

[tomrscott]

Re: 1/2\" Carriage Bolt Loading?

keeney,

In your case I agree that is a nice looking setup. In my case, all of the weights will fit inside the wheel and not stick out past the wheel rim and tire, so I am not likely to get whacked by it.

Still, soundguy's suggestion of acorn nuts is interesting.

Your setup looks good. A lot of wheels weights I've seen have so many cutouts and rims and recessed or raised lettering, that they don't use the thickness very efficiently. Maybe you turned that side in toward the wheel?

-ts

 

[mrcaptainbob]

Re: 1/2\" Carriage Bolt Loading?

Nuns and children on a 300MPH machine.
Good one..thanks for that chuckle....

 

[Soundguy]

Re: 1/2\" Carriage Bolt Loading?

Thanks.. I was trying to come up with a good vivid " dont try this" mental image.

Glad it made you laugh... though i was hoping perhaps for a coffee spray.. or some other effect! /forums/images/graemlins/wink.gif

Soundguy

 

[Defective]

Re: 1/2\" Carriage Bolt Loading?

I came up with a very minor choke on my lemonade...how's that?

 

[keeney]

Re: 1/2\" Carriage Bolt Loading?

RE: <font color="green"> A lot of wheels weights I've seen have so many cutouts and rims and recessed or raised lettering, that they don't use the thickness very efficiently. Maybe you turned that side in toward the wheel? </font>

Yes, the side with the lettering and raised rim is towards the in-board side. The raised rim worked out nice because the rim of the inner-most weight is tightened flat against the wheel face and it is not pressing unevenly on the wheel lug bolts. Plus it doesn't look as home-brew as having a tractor that says "25 lbs / 11.4 kg" on the side of the wheels.

I used the least-cutout weights I could find used in a diameter to fit inside the wheel. Still, there is some space wasted. Maybe 20%.

The weights are about flush with the rim of the wheel, and the tire bulges out a bit past that, so I don't have to worry about clearance. If the tire clears an obstruction, the weights will too.

I looked at acron nuts, but they had three drawbacks: 1: they would stick out slightly more, 2: you have to cut the bolt to within less than 1/4" of the exact length required or it will bottom-out in the nut (which will not be easy with a grade 5 or 8!). 3: They don't stay tight as well as the ny-lock's I used on the inside of the wheel.

- Rick

 

[goodoleboy]

Re: 1/2\" Carriage Bolt Loading?

They should have a good strength as the my 10,000 lb trailer hitch is mounted to only 6 of them. Thats 1666 LBS per bolt.

 

[Catmando]

Re: 1/2\" Carriage Bolt Loading?

Make the weights so that they set in the rim nicely. Then the bolts only have to hold them in place.

1/2 inch mild steel will handle over 4400 pounds in tension each. Shear would be about half of that.

 

[tomrscott]

Re: 1/2\" Carriage Bolt Loading?

Thanks,

Unfortunately I can't easily make the weight disks a snug fit into the wheel rim. First it is convenient to be able to get my fingers in to pull them out, but more importantly, the rim has some "corrugation" to it between the outer rim and the inner face, so the diameter constantly changes for each disk.

But as you say, I think the bolts are going to be plenty strong enough. I will be able to sock them down tight enough that I don't think there will be any shifting going on.

 

[Densleigh]

Re: 1/2\" Carriage Bolt Loading?

Hi,
have read your various comments and would add my t'pen'th as follows.

Keenay's idea is the easiest - I did this 20 yrs ago and it still works. basically I made up a sub plate Piece of angle iron with a 25mm dia spindle welded to centre it. Then bolted to rim with 2 x 8mm bolts _all I had available!

I used CI bar weights (York from Canada) in a variety of sizes to 'fill' rthe rim centre secured by a suitable collar on shaft - This pinched up with a bolt.

I have added somewhere in the region of 80kgs to each wheel
on a Roper 8hp machine used for pulling single axle trailer of about 3/4 ton around sloping site.

I can assure you that they have not fallen off, are dead easy to remove if you have a puncture etc .

I have not been caught by the spindle walking past or indeed has it inflicted damage on anything around here.

(then if you do walk into it - you won't do it again - in a hurry!)

Incidently I was taught that a 1/2" bolt will hold a minium
of 1/2 ton and pro -rata down ie 1/4" = !/4 Ton etc.
It seem to work in practice

Cutting thread down on a bolt can actually weaken bolt and cause it to snap where original thread stops - just what happens. No doubt a theory somewhere but be aware.


Hope this helps your decisions

regards