Gear reduction/Gear pitch?

[TNT_Pulling]

But it's not in the description.... - Derrick

Derrick,

You are right that it does not state that in the Version 7.0 book. BUT in the NR/CTPA Version 6.7 (2007 rulebook) it states this for the 2WD Pro-Mod class . . . . .

8. Motor​

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$115 limit any 540 can, not having cobalt or Neodymium​

magnets available on national market.

I think the omission of the cobalt magnets might have been an oversight when removing the neodymium magnets portion of the rule. These were removed as brushless motors use neodymium magnets.

Thanks

 

[thunder7845]

Ok, sorry for all the newb questions.

 

[TNT_Pulling]

Ok, sorry for all the newb questions.

Newbie questions are good . . . . . you can't learn if you don't ask questions. We will not gain participants if people building or wanting to build don't ask questions.

Keep the questions coming . . . . .

Thanks

 

[thunder7845]

What thickness of aluminum are you using for the main part of the chassis?

 

[nrctpaXpres]

I use 1.5 aluminum box or 2" aluminum box for bigger classes 2" makes it easy to also fabricate a motor mount right in the box ...nice....even an Astro pull 4 if you do it right

 

[mn_gumby]

I just started pulling and I'm using 48 pitch gears on the motor and the first spur. Using 32 off the jack shaft and the spur on the axil. I'm also using the gear reduction for the wheely king and can get gearing from about 1/60 to 1 to over 1/400 to 1. Using this in a seven lb. class so far no gear problems.

 

[thunder7845]

K my next question is how are you attaching the wheels to the axle? Are you using a hex for the rims still? Again any pictures on this matter would be nice to have. Thanks.

 

[thunder7845]

Bump!

 

[dpero]

I don't trust just the hex on a plastic wheel. When I use hex wheels, I use the hex to center the wheel then a pin in a hole of the wheel to transmit the torque. If I use a blackfoot style wheel, I just drill through the 5 nubs(?) for 4-40 screws, then drill out the wheel center to 1/4 in, which is my axle size. Old pan car/Bolink hubs work.

I'm not sure if anyone sells an adapter. Maybe C. Grady would?

No pics of the hex hub handy at the moment.

 

[nrctpaXpres]

that's a real nice frame you got there...hooter makes a lot of adaptors and different kinds of hubs...we grind everything off and use a 4 bolt hub to lock it down.....

 

[thunder7845]

Thank you dpero, keep the pics and ideas comming guys.:tmb

 

[grady pulling]

hubs

i make 12mm hex adapters but derrick is right they will spin :-(i only use them on garden tractors chris..

 

[thunder7845]

Well I have started gathering materials for my puller builds, so far i have one set of tlt tires, a bunch of random 32pitch gears, 6ft of 2in by 2in 1/8in box tube, pede knuckles, some random bearings, and frog front wheels and tires.
My plan is to build three or so that way I can let some other people try it out.

 

[dpero]

Sounds like your off to a good start. Old pan cars might get you some steering parts. Same thing for rear axles. Also check out servocity.com for goodies. I hope you can get some more people interested.