4wd offroad petrol car DIY
#1
Junior Member
Thread Starter
Join Date: Jul 2010
Location: Rakvere, ESTONIA
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts

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?

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?

#2
Senior Member
Join Date: May 2009
Location: Temecula, CA
Posts: 127
Likes: 0
Received 0 Likes
on
0 Posts

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.
#3
Senior Member
Join Date: Jan 2008
Location: parksville,
BC, CANADA
Posts: 1,786
Likes: 0
Received 0 Likes
on
0 Posts

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
#4
Junior Member
Thread Starter
Join Date: Jul 2010
Location: Rakvere, ESTONIA
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts

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.
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.
#6
Junior Member
Thread Starter
Join Date: Jul 2010
Location: Rakvere, ESTONIA
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts

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$ !!!!



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$ !!!!




#8

Join Date: Jan 2009
Location: Close to the beach, AUSTRALIA
Posts: 3,497
Likes: 0
Received 0 Likes
on
0 Posts

ORIGINAL: mooman007uk
the steels I mentioned machine easily, they don't get hard until after heat treatment
the steels I mentioned machine easily, they don't get hard until after heat treatment

How does one heat treat steel?
#12
Senior Member
Join Date: Jan 2008
Location: parksville,
BC, CANADA
Posts: 1,786
Likes: 0
Received 0 Likes
on
0 Posts

ORIGINAL: Dirty_Vinylpusher
How does one heat treat steel?
ORIGINAL: mooman007uk
the steels I mentioned machine easily, they don't get hard until after heat treatment
the steels I mentioned machine easily, they don't get hard until after heat treatment

How does one heat treat steel?
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
#13

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!

#15
Junior Member
Thread Starter
Join Date: Jul 2010
Location: Rakvere, ESTONIA
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts

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