Hummina

If u go to steelhubs.com u can see it all

The smallest shaft is 20mmx7mm as apposed to an 8mm typical skate axle that also has a 7mm bearing..two per wheel. The latest version is 1144 steel. Really all I need to do is figure the difference in load ability between the two steels and figure how the size will distribute or reduce that load. Where would I go about finding an engineer who could help? Maybe I could still use the 1018 for the rotor as its surface area which support the small bearing is much larger. The smaller bearing sits in a 7x 32mm housing. Or...maybe i should get it case hardened

Who is my engineer? Who would like to be my engineer? although I have a site and sell things I don't make almost any money. Experimental. Learning while doing so I sell cheap. The prices on the site aren't real and never sold for those prices. Dont have any of hose motors left. Doing bigger motors, more powerful, run cooler, bigger sealed bearings. But I have two missing links...what materials would be best and how to get an interference fit done

I read the permalloy (nickel alloy w iron) is hard to machine though. That's the other characteristic I'm looking for, easy to machine. The 1018 and the 1144 are. Maybe case hardening 1018 is worth doing. Most of what I read says it's not worth doing as the carbon content is so low, but sometimes I read it absorbs the carbon around it and it is worth doing.

The motors are maybe one horsepower continuous. Hard to say. I'm looking for whatever characteristics keep shaft and bearing housings from deforming. The loads come from outside forces not the motor. They come from riding over rough roads or getting run over by cars. if you look at the website steelhubs.com you can see the motors inside and out and see some video of me riding around. Skateboard hub motors Want to make the most robust thing I can but still have a rotor back iron with enough permeability to reflect the magnetic field from the magnets. I imagine the shaft, since it's not moving and a smaller surface area, will take the hardest hits and I'd like to believe 1144 for that part and 1018 for the rotor will be good enough ( all bearings are 7mm diameter and u can see the shaft's other dimensions generally on the site) any thoughts?

I'm looking for the best steel for these motors I've been getting made: steelhubs.com they take a beating and I'd like to not have the shaft or housing deform which makes me think I'd want a high carbon steel, but they're electric motors and at least the outer housing will benefit from the lowest carbon content possible as it will have greater permeability and strengthen the magnetic field and make a stronger motor. From what I read there's not much that can be done to 1018 to harden it though. I'm assuming hardness is what I want most. Presently doing both parts in cold 1018 and soon to have some in 1144 but I think they will be weak motors. I'm not sure what's needed and maybe even the cold 1018 is good enough. I don't have money to do testing or engineering and am hoping someone here has some relative experience I could maybe extrapolate from the lower the carbon content the better but also the easier to machine the better thank you