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  #2141  
Old 07-11-2017, 11:46 PM
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Default Re: Great Dane excavating co.

I figure that joe, and was keeping you in limbo. Lol!! Short fuzzy tail and keeps digging tunnels, hummmm, I should have mailed him to you, could have had two for the price of one free!!! I got his sister or lover? A day later.

And here is the garage mouser, well garage fly hunter!!



And the excavator finally wore out the second set of track drives, was just going to order new motors but not in stock,,, and they are not a true planetary gear but a spur gear reduction. I've been messing around with this idea for some time and never went anywhere with it. Well now I have from necessity. I had these small planetary gear reduction motors laying around and decided to put them to use. I will not know if they are strong enough until they are installed. I did a simple test in a vise and they are way too fast. I have the 195 rpm ones, should have the 27(? Forget the number off hand) rpm ones tomorrow. Some progress on them.

This is the motor shaft drive hub, it's not parted of in the pic







Making the drive hub that will have the above hex piece nested into it





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  #2142  
Old 07-11-2017, 11:49 PM
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Default Re: Great Dane excavating co.

Broke a m3 tap , hand taps are not the best for the machine. But I did get it out and able to use part. First time I ever successfully removed such a small tap.





And am going to be printing a cover for backside of motor but didn't want to do that till I find out if they will work



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  #2143  
Old 07-11-2017, 11:53 PM
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Default Re: Great Dane excavating co.

Forgot two showing the motor shaft hub fitted into sprocket wheel him






Will probably make new ones of these as I can get them a little more snug and also messed up on the chamfered edge, kind of like a knife edge on them.
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  #2144  
Old 07-12-2017, 08:00 AM
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Default Re: Great Dane excavating co.

RW, the motor you are holding looks like the new ones I put on my little Oliver Dozer? I was under the impression that they are planetary? I think servo city advertising indicates planetary and they cost a bit more than the spur gear version.

Man, the indoor area would be COOL! I would love to have something like that!

Jim
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  #2145  
Old 07-12-2017, 08:54 AM
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Default Re: Great Dane excavating co.

Quote:
Originally Posted by Rvjimd View Post
RW, the motor you are holding looks like the new ones I put on my little Oliver Dozer? I was under the impression that they are planetary? I think servo city advertising indicates planetary and they cost a bit more than the spur gear version.

Man, the indoor area would be COOL! I would love to have something like that!

Jim

I may have confused the situation. Yes Jim these ones are true planetary reduction motors. The ones I was referring to were the original ones from the excavator, and the replacement (same) ones sold on rc4wd under spare parts for the excavator. Those are spur gear reduction motors. I'll try and post some more pics (if pb doesn't delete them) of the whole workings.
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  #2146  
Old 07-12-2017, 09:06 AM
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Default Re: Great Dane excavating co.

I picked this interesting tool up the other day. This will make removing those broken taps easier Cooper.



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  #2147  
Old 07-12-2017, 12:11 PM
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Default Re: Great Dane excavating co.

Oh wow! I never knew of such a devise!! What evil genius came up with that!?!?!! I bet he was bald, pulled his hair out from scrapping parts with broken taps, then developed this!! Lol!!! Can't grind/drill/pull it out just liquefy it!! Brilliant!! Thanks for sharing Steve, and nice find. Now just remember you have it next time you break something. Would be neat to see it used.
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  #2148  
Old 07-12-2017, 12:25 PM
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Default Re: Great Dane excavating co.

http://youtu.be/YbeKxFBZrF8

Interesting use of such a devise, everyday I learn something. Usually it's stuff I wish I could unlearn, but today was interesting.
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  #2149  
Old 07-12-2017, 05:32 PM
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Default Re: Great Dane excavating co.

The new parts look great!

That's really interesting, i had no idea that was even a tool! So it's a water cooled vibrating arc cutter that blows the center web out of the broken tool and flushes away the particles? Awesome!
I'd played with broken tap extractors, and seen how to use alum if you have a couple days to disolve tap.

I think Cooper has a point.. "No Mr Bond, i expect you to die. My henchman will see to that while he removes your tap."
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  #2150  
Old 07-13-2017, 06:07 AM
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Default Re: Great Dane excavating co.

Cooper,
If you use roll taps (form taps) they have a lot less tendency to break. The kicker is they really only work in machines, not by hand. Also the typical tap drill chart your probably using is calling for 75% thread. By using bigger tap drills you can go all the way down to 55% thread. This is usually a must on taps m2 or smaller.

Bryan
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  #2151  
Old 07-13-2017, 07:57 PM
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Default Re: Great Dane excavating co.

Are you guys still seeing my pictures? I know Photobucket has been suckin canal water lately. ?
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  #2152  
Old 07-13-2017, 08:38 PM
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Default Re: Great Dane excavating co.

Yup I can see your photos for now anyways.
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  #2153  
Old 07-13-2017, 09:25 PM
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Default Re: Great Dane excavating co.

Ok good!!!

Got track drives painted



And a picture line up of parts, I did go with the 26 rpm plantaries. 583 oz-in of torque. They have been able to drive up and over my boots with no problem so I may be in for track breakage issues down the road. But speed is excellent. Not fast and not a snail.













I made a cover for motor and wires. I had yellow filiment loaded and made test pieces that need a little tweaking but the final will be very similar.
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  #2154  
Old 07-14-2017, 08:20 PM
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Thumbs up Re: Great Dane excavating co.

so i hope you know that with the quality of your workmanship you must make more copies lol i might just get the model just for your upgrades hehe very nice work
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  #2155  
Old 07-14-2017, 10:45 PM
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Default Re: Great Dane excavating co.

Hey thanks!! Some tweaking on parts, forgot to add a hole for wires to pass through. And then the motor wires need to be soldered after parts are together. The plastic housing is a little too tight of a fit but they work and to my suprize I went up about a 1 1/2 foot incline that was about a 45 degree incline (probably more than that). Steep enough that it was sliding backwards and had to use the bucket to pull it up. Tracks didn't stall. Now I'll have to see how it takes debris in links with sprocket. ?? Hopefully tomorrow I'll get some videos.
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  #2156  
Old 08-04-2017, 07:05 PM
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Default Re: Great Dane excavating co.



Tracks are working great!! Found another tree stump project down at our riverlot.
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  #2157  
Old 08-04-2017, 07:09 PM
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Default Re: Great Dane excavating co.





And a couple weekends ago had these guys come up and had a blast!! One problem with the hoe, hydraulic line poped and steve n Benny had it back together before I could get things cleaned up!! Thanks guys !! Nice to be able to be doing something else and knowing you guys were fixing it. One of the few times I never had to say how or watch to make sure it was being done correct!!!



And lunch!! Thanks! Appreciated it, good too!!!
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  #2158  
Old 08-04-2017, 07:10 PM
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Default Re: Great Dane excavating co.



Forgot the pic of hydraulic line failure
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  #2159  
Old 08-04-2017, 07:27 PM
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Default Re: Great Dane excavating co.

You gona make it out to the Pike show this year?

Jim
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  #2160  
Old 08-14-2017, 03:04 PM
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Default Re: Great Dane excavating co.

Well it's official,





993k has been ordered for the company!!





Going to be a bit bigger than the 785!! But will fill the haul truck in 6or less scoops. I thought I could use same tires from the haul truck as they are same size radially but found out they are wider so back to making a print for tire mold. Printed 4 pieces (as print bed isn't that big)19 hours for each piece!!





And started some work on rims



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