Brat / Bob

n0regret5

New Member
Re: Brat/ Bob

sasquach said:
I don't know if it makes a difference but I put a pig in there about 2 inches on each side of the cut . Thanks
ah righto. small lesson here, a tube is less likely to bend than a solid bar. I highly recommend at least a shallow gusset there, I'd hate to see all this beautiful work go to waste.
 

Flugtechnik

My bike is not transportation, it is a respite
Brat/ Bob

n0regret5 said:
ah righto. small lesson here, a tube is less likely to bend than a solid bar. I highly recommend at least a shallow gusset there, I'd hate to see all this beautiful work go to waste.
I think you need to qualify that statement. If you have a tube and a solid bar with the same OD the solid bar is less likely to bend. I can prove it with math.

However, given the same amount of material, you can make a tube with a larger OD than a solid bar and the tube will be stronger. But that is really just because it is larger. Tubes are more efficient structurally than solid bars.

I do agree with the area of concern and think a gusset would help.
 

VonYinzer

Active Member
Re: Brat/ Bob

Remember, weld your gussets in on the outside (or inside) of the tubes. Not right down the middle.
 

sasquach

Member
Re: Brat/ Bob

I was going to but with the suspention travel it's not going work plus I kinda like the way it looks without it .
 

Staffy

It's not yours 'til you cut it up.
Re: Brat/ Bob

I'd put the gussets on the inside so that they can be covered by the seat pan and still keep the clean lines.
 

Hoosier Daddy

Earache my eye...
Re: Brat/ Bob

VonYinzer said:
Remember, weld your gussets in on the outside (or inside) of the tubes. Not right down the middle.
This I did not know...
Not that I doubt you, but what is the reason?
 

VonYinzer

Active Member
Re: Brat/ Bob

Well, as it was explained to me, welding gussets down the center of the tubing allows the tube to flex rotationally. Welding to the side of the tube stops that, as well as keeping the tube from flexing laterally as well. Im sure theres a much more detailed (and correct) definition floating around here on DTT somewhere.
 

sasquach

Member
Re: Brat/ Bob

Well I think I'm pretty much done till after the new year . So far all I got to go is weld in 2 gussets under the seat , finish the seat pan , weld up the shock mounts then start looking for a small battery . I got more done in the little time than I would have ever guessed and thanks for all the good info and help from everyone so far .
 

sasquach

Member
Re: Brat/ Bob

Thanks Cresent . It's gonna be on hold for a little bit cause of the holidays and I need to get a chain so I can make sure it doesnt hit the shocks before I weld them in.
 

VonYinzer

Active Member
Re: Brat/ Bob

You'll actually have to remove a bit. Its a universal chain for farm equipment. Pretty long. Keep it greased and it works like a dream though.
 

sasquach

Member
Re: Brat/ Bob

Once again thanks Mike it would of been alot harder doing this without yours and others giving good advice . :)
 

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