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  #1161  
Old 11-10-2015, 10:15 AM
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Default Re: Great Dane excavating co.

They really turned out good. What durometer did you end up going with?
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  #1162  
Old 11-10-2015, 12:37 PM
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Default Re: Great Dane excavating co.

I made the first one a60, pretty firm, the second try is A40. I think the 40 will be better. Can squish the treads easy but I don't think the tire will roll or flex too much once on rim.
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  #1163  
Old 11-10-2015, 03:51 PM
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Default Re: Great Dane excavating co.

Tire looks good cooper!!
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  #1164  
Old 11-10-2015, 04:30 PM
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Default Re: Great Dane excavating co.

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Tire looks good cooper!!
Thank you!! I found the sweet spot on this mold, I now have 4 nickel sized vent holes. And have the mold slightly unlevel. Before I mix the resin I degass the A side with dye. Introduced a few air bubbles and that side is the rather thick side. That pulls a lot of small bubbles suspended in it. Then mix slowly. The B side is pretty thin so when combined it is fairly thin. Slowly pouring and tapping and pushing on mold released most stuck air bubbles. I think the ruff side of the mold creates just enough surface tension for air to stay put. Guess it goes back to really spending time on the mold part, really making smooth. I just figured it's the backside and wouldn't show so I didn't spend much effort on that side. But the finished tires will be fine for me. Throw some mud on and it will look fine . I guess that's why I like my stuff scratched and dented, it hides a lot of the imperfections !! Lol!! Just waiting for some alum to show up and then start the smoke pouring from my ears! Tires are just a couple ounces under 4 pounds. And I think I got the pigment correct. 10 drops of black pigment each tire.
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  #1165  
Old 11-10-2015, 05:24 PM
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Default Re: Great Dane excavating co.

Huge run flats ? Mike
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  #1166  
Old 11-11-2015, 10:26 AM
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Default Re: Great Dane excavating co.

Tires look fantastic buddy... took me awhile to get caught up entirely on your thread, I was absent the last couple weeks of October.

Anyways, considering your motor options... I checked the motor output of the 4206, pulled the wheel off to get an accurate shaft rpm of 87 & my gizmo has a wheel adapter too, measuring surface wheel rpm 347. The 4206 has a 4 7/8" tire & the model moves along nearly at walking pace (I have a 36" inseam, I take big steps).

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  #1167  
Old 11-13-2015, 10:19 PM
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Default Re: Great Dane excavating co.

thanks joe, I still haven't decided what gearhead motors I'm going with..,, I'm waiting on some alum to show up and then ill figure out what motors will fit inside the axle housing. I may even take brian from exclusive rc advise and make printed parts once the motors are secured.
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  #1168  
Old 11-14-2015, 02:16 AM
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Default Re: Great Dane excavating co.

I noticed a few pages back you said got some .55hp motors, they have gearheads on them too?

I did the measuring of the 4206 to try to find out what might be a good speed for your trk with 8" tires & hopefully still have plenty of power to move 160lbs with just two motors... the math works out to something between 50-55rpm.

Ofcourse with your tools & talent you could also add an outboard planetary hub for more reduction from a faster smaller gearhead motor, pulling the guts out of a cordless drill.
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  #1169  
Old 11-14-2015, 11:22 AM
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Default Re: Great Dane excavating co.

Here are the motors I got , well in mail. They may have to me taken apart and incorporated into the axle housing for a more slim mount. Being square, and the outside of gearhead may be just a little bit big. Don't know exactly till I get to it.

http://www.robotmarketplace.com/products/0-PDX256.html

90 rpm at shaft, and the stated hp is .55. Hard to believe half horse at shaft. But 256 reduction, I might not want to get my fingers swisted up in it. !! And having a half inch shaft that is already tapped at end, keyed,, that makes a lot more options I have for adding a weight bearing shaft. Your posts a while back on the adt, with fumotec axles is what gave me the idea. So reciprocating the posts, thanks.
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  #1170  
Old 11-17-2015, 12:55 PM
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Default Re: Great Dane excavating co.





A start to the drive system.
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  #1171  
Old 11-17-2015, 02:58 PM
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Default Re: Great Dane excavating co.

those look huge or you have small hands
like mr.nutters
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  #1172  
Old 11-17-2015, 03:04 PM
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Default Re: Great Dane excavating co.

Big hands and feet! Lol!!! No mr nutters is busy wrenching elsewhere
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  #1173  
Old 11-17-2015, 04:43 PM
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Default Re: Great Dane excavating co.

Let's have a competition..... Guess the weight of rear axle and tires mounted when completed.
I say.... 27lbs. ish.
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  #1174  
Old 11-17-2015, 04:48 PM
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Thumbs up Re: Great Dane excavating co.

Yea.
I say 27.7 lbs. ish.
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  #1175  
Old 11-17-2015, 04:54 PM
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Default Re: Great Dane excavating co.

24.5lbs with welding 25.5 with
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  #1176  
Old 11-17-2015, 05:29 PM
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Default Re: Great Dane excavating co.

im going for 26.9
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  #1177  
Old 11-17-2015, 06:51 PM
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Default Re: Great Dane excavating co.

How do you get so close to a squirrel to catch them as pets . I've touched one and it took of like a rocket ! Mike
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  #1178  
Old 11-17-2015, 07:05 PM
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Default Re: Great Dane excavating co.

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How do you get so close to a squirrel to catch them as pets . I've touched one and it took of like a rocket ! Mike
Haha!! I wish I had your luck!!! Naaaa,, we have "acquired" a few odd pets from other people thinking I like them. Save one and the whole town thinks I'm open to saving all!! I was given mr nutters from a little girl and mom, found on ground. I couldn't say no, so we nursed him back and then released him In plenty of time for the upcoming small game season. . We pre stuffed him!!! Bulked him up for a good mount!! Hahaha, (let him go in a campground)
YOU REALLY DONT WANT ONE FOR A PET!! The bite through hard nuts- fingers are very soft!!

So the tires/axle???? I'm slightly at an advantage here but I'll play,,, I'm saying 28.8
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  #1179  
Old 11-17-2015, 07:07 PM
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Default Re: Great Dane excavating co.

Quote:
Originally Posted by Supermario View Post
Let's have a competition..... Guess the weight of rear axle and tires mounted when completed.
I say.... 27lbs. ish.
Daahmm Mario!! I put stuff on scale and tried to figure it out!!! I guess the camera doesn't add a few pounds after all!!
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  #1180  
Old 11-18-2015, 02:57 PM
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Default Re: Great Dane excavating co.

Got some idea of what rim I'm doing. The size of these parts has made me think of using separate pieces combining into one. That requires me to learn how to weld alum. No spool gun . No tig, just the long line gun on the mig. . But I did pick up a tank of argon. Luckily none of the welds will be visible and I'm going to be turning/milling them down. So what could go wrong!!! Lol!!! Thinking I really only need to to about 10" of alum weld all together. I still can't justify a tig welder,,,,,yet!!! Might change when I start pulling birdsnests out of the line feed!!!

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