help with brakes please

[gotbags-10]

doing a small electric project so i need minimal stopping power. I am going to have a 5/8 live axle in the rear. Would this brake work on that? It shows a 5/8 id bore so i assume it would fit my axle http://www.bmikarts.com/item/Internal-Expanding-Brake-5956

 

[Doc Sprocket]

That would work. Must be a small machine, for you to have a 5/8" axle. Have you looked into regenerative braking?

 

[r97]

from what i have read regenerative brakes can't actually bring a vehicle t a complete stop, so he will still need normal brakes, plus regenerative brakes require a special controller.

as long as your not going too fast, and your vehicle doesn't weigh much, they should work just fine! a 5/8" live axle seems a bit thin to me, but maybe not.

 

[gotbags-10]

i know it seems thin. I went with DOM tubing. The shop i bought it from said its strong enough for me. Its just a 1000watt motor

 

[r97]

wait, are you saying you are using a piece of 5/8"OD DOM tubing to act as a live axle?

 

[devino246]

And JUST a 1000w motor??? And r97, your right, they can only slow the kart down. The only thing I can think that you'd need are some diodes and someway to limit amperage.

 

[redsox985]

You'd better put a lot of support bearings on that axle. And that's a beefy motor for a small vehicle!

 

[r97]

reasonably sized motor yes. seems so tiny compared to the 5000-6000w i wanted to run on a go kart! lol, but that would be a LOT of power.

but yea, at least a 5/8" solid shaft supported on both ends, i would personally go with 3/4" if its a live axle. if the axle isn't supported on either side of the tire(s) i would consider a 1" shaft

 

[gotbags-10]

i plan on mounting the axle to my frame with pillow bearings. the wheels i have use a 5/8 hub so thats why the 5/8 axle rather than buying new hubs.

 

[jrmints1415]

you could always get an axle that is 3/4 that steps down to 5/8 which is what i would reccomend. dont plan on it holding for long!