rallikas

Im going to take on a new project on a new level for me. Im going to try to make 4 wd intependent suspension petrol rc car.
The budget is max. 100 dollars.
Im going to make 3d drawings, if i have time, but i design as i build.
Ask if you want to know something!

Im going to make the hubs at first. Some 3d drawings of the front ones











And now- real life. I turned (on lathe) some pipe to right lenght for hubs.Bearings are 22x8x7mm (8mm shaft) You can see the protoype axle cup also!
WOULD aluminum cups be strong enough?

pinkducky

Aluminum is not strong enough. I would try hardened steel, chromoly or titanium if you can afford it. Then again the project would be more expensive.

mooman007uk

the cups need to be real hard but not too brittle....you need a deep hardening steel, 4140, 4340, 8620 or 4620 they can develop tough core strength and good case hardness...you'll need to get the heat treatment right on or 1. they'll snap or 2. they'll be too soft

rallikas

Ok, I will try different materials. If old one breaks, i can always make a new and stronger one(s)!
But i dont know if I have good enough blades for the lathe to cut stronger materials. I tried to make something from a hardened sit-on mower shaft some time ago and the blades didnt cut it.

mooman007uk

the steels I mentioned machine easily, they don't get hard until after heat treatment

rallikas

Got some bearings, sprockets and made some metal hubs!
4x 12t 05b sprockets 15$
10x bearings 10$
aluminium (not on pic) 15$
plastic free











I`m regular buyer there, so I got a lot of extra free plastic from the store too!
I was told that 1 sqm of that blue plastic you see on pic actually costs 10000$ !!!!

rallikas

I cant stand doing that dull 3d animore!! Just have to start building.

Dirty_Vinylpusher

How does one heat treat steel?

rallikas

Got some work done. Found a cool thing for the baseplate! Wheelbase is 50cm like on mcd buggy.

Dirty_Vinylpusher

Nice!
Not sure how strong that baseplate is but I'm sure you'll make it work.

rallikas

I tried to stand on it, and didnt see any bending.(63kg) Its quite thick metal, and has a good shape.

mooman007uk

very carefully...not something you can do at home as you need a temp controlled forge. depending on the desired properties you need for the application you heat at a specific temp..1350degF + ... and hold at that temp for a given time then quench in oil, brine or forced air depending on type of steel..then temper to the specified temp.

looking good rallikas

Mudgy

I'm liking the chassis plate mate - thats a transport anchor for tie down straps. Used in Aircraft, shipping & truck bodies. I had some lengths show up at our warehouse damaged once, so we cut up the bent ones into short lengths; put them in the box trailer. Now the load doesnt have to be 2 feet high anymore - can tie down a 100mm load to the floor now!

rallikas

No pics, but hubs are done!

rallikas

Pfff... Building the real (1:1) buggy and CNC mill has taken so much time that i havent done any progress on the car...