the structure of balance bar in brake pedal assembly

[Frank Ming]

Hi,
I am designing the balance bar,and facing some problems.I have already looked up some products of apracing and wilwood,but I still can't understand it's components' structure since there is no more detail information.my problem is : the hole in "Barrel Nuts" is smooth or threaded? and how do the Barrel Nuts,Jam Nuts,Clevis and Adjusting Shaft assembled? I'm sure you can help me.Thank you!
my email: worldgoodman@163.com
Frank Ming

[ben]

AP Racing put full three view and exploded isometric cad drawings in pdf for most of their new products - this includes balance bars.

May I ask how easy you want things to be?

Can we get back to talking about concepts and engineering philosophies rather than doing peoples detail design work for them?

Ben

[Composites Guy]

What is your reasoning for building the balance bar instead of buying one?

My point is this: Balance bars are cheap. Call and ask the manufacturer for an FSAE discount. Also, the balance bar I have purchased appears to have rolled threads and be heat treated for strength. It has a zinc coating for corrosion protection. The threaded rod is a one piece part that incorporates the center of the spherical bearing (pretty neat and difficult to make yourself). It includes aluminum clevises, works nicely and has little slop. If you can make a better suited part for under 40 US dollars, and you have plenty of time on your hands, go for it!

Personally, I'd rather focus my efforts on other parts of the car.

[Frank Ming]

Maybe you are right!It is better to buy it.Think you for your advice!!
Frank Ming

[Infinity]

Even our team is looking for a balance bar. The trouble is that we are Indian team and there is no company in India that makes a balance bar so we need to Import them. Problem is that we need three quotations for that. Have tried Wilwood and Tilton but got reply from none. Please help.

[Horace]

Balance bars are not cheap if you want to have a nice design. Unless you use the spherical bearing type ones, all the trunnion ones I have found were several hundred USDs, and our team cannot justify that cost, so we built our own using the AP Racing schematics that Ben suggested. I'm a poor machinist, but it didn't take long and it wasn't hard.

If anyone finds a cheap balance bar of that design, let me know.

Oh, and if you look carefully between the two designs, you'll see that w/ the spherical bearing design the shaft is able to rotate up and down, which takes away some of the braking force and adds a bit of travel that you can get rid of with the trunnion design.