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 Tracked craftsman

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Camdg2010
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PostSubject: Re: Tracked craftsman   Fri Mar 31, 2017 11:49 am

well guys heres the pictures of what i started with, and what i hope for it to look like






the picture with tracks is what im going for. i know im going to need something in the middle to help support it so when i go over uneven ground it wont bend stuff
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Camdg2010
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PostSubject: Re: Tracked craftsman   Fri Mar 31, 2017 11:52 am

i may run smaller wheels... let me know whay you think!
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AllisKidD21
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PostSubject: Re: Tracked craftsman   Fri Mar 31, 2017 1:00 pm

That looks pretty cool!
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Camdg2010
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PostSubject: Re: Tracked craftsman   Fri Mar 31, 2017 1:09 pm

if i were to use 6 front wheels of other mowers, all the same size, how could i get the stock front hubs to work on the drive axles in the rear? there isnt key slots in them so i cant do that, drilling and or welding onto the wheel motor axles will weaken them... any ideas?
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prancstaman
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PostSubject: Re: Tracked craftsman   Fri Mar 31, 2017 9:28 pm

Might be easier to stay with the 8 inch rims that will be keyed to the drive axles. Maybe find a way to take the tire off the rim and fill in the center of the rim with some sort of flat rubber so it will be even across the rim. Should be able to bolt the flat rubber to the rim also. The outcome will probably be almost the same size as a 6 inch rim with a tire on it.
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Camdg2010
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PostSubject: Re: Tracked craftsman   Sun Apr 02, 2017 1:44 pm

well unfortunately its going to be a long time till this get done, i ran into some money troubles recently, but im still puttering on it. it shouldnt be to long till i can start ordering parts seems its only gonna run me about 1000 or so for both wheel motors and the flatstock to build the guides with. i will try to post pics of any progress, all i did in the last 3 days was remove the running boards and took some dents out of the dash panel.. anyways more to come!
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prancstaman
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PostSubject: Re: Tracked craftsman   Sun Apr 02, 2017 7:36 pm

No rush, I been working on my Scorpion for a little over 5 years. Something like this takes time. You never know what's  going to come up. Maybe between now and the time you have the money saved, you'll have a welder to make it easier.
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Camdg2010
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PostSubject: Re: Tracked craftsman   Wed Apr 05, 2017 10:11 pm

not much progress. still waiting on $$$$ but here are some pictures of it mocked up with tracks. im loving this build! last 2 pictures show how the rear was stoved in, took about 1.5 hrs to remove that huge dent to my liking's, i also removed minor dents





in the hood and grill
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mightyraze
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PostSubject: Re: Tracked craftsman   Wed Apr 05, 2017 10:35 pm

Pretty good job on that dent. It was huge and squished tight!
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prancstaman
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PostSubject: Re: Tracked craftsman   Fri Apr 07, 2017 8:05 pm

This thing is going to look mean, LOL.
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Camdg2010
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PostSubject: Re: Tracked craftsman   Wed Apr 19, 2017 3:20 pm

so i was thinking the other day, i wanted to take some 1/4 steel and make sprockets out of them 4 sets for each track, on in front and one in back, that way i wouldnt need track guides... but i was thinking, what about taking 4 car rims that have a width of the slots in the tracks? cut triangular shape notches in them to act as teeth? if i made 4 of these then i wouldnt need guides because the rims would act as sprockets and keep itself aligned.. any thoughts?
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prancstaman
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PostSubject: Re: Tracked craftsman   Wed Apr 19, 2017 10:06 pm

I could see the 4 sprocket idea working but never seen it done for that purpose. I heard of a German tank, I think it was, use the rear sprocket for the drive sprocket and the front sprocket for the brakes. I can see your idea working just as long as the tracks are kept tight. On mine during testing, when the front idlers were not set right and the track was running to one side, I have guides built into the sprockets and it took alot of tension to keep the track on the sprocket without the track guides jumping off the sprocket. Would be good to bevel the triangles on the tips to help kick the tracks back into position when wanting to go to the side. That way the sprockets don't cut into the tracks.

Making the sprockets to fit the track is the hard way of doing it but doable. You can't just grab any rim when doing it this way because the teeth won't mesh up with the track. It will end up like; your starting point on the rim, the teeth are made to fit in the track, as you go around the rim mounting the teeth, when you get to the last tooth to mount on the rim will not fit because the space is too small. The rim will always have the wrong diameter when done this way.

It takes geometry and math to design a sprocket for tracks. If you was making the sprocket first then the tracks to fit the sprockets then that's a different story. I looked through the build thread on my Scorpion, on page 3, in the middle is where I made the sprockets. To give you an idea on how you need to do it. When I designed my sprockets I never new the primary diameter of the sprocket, and still don't.

Do you have the snowmobile sprockets still? It would help alot in the design of the sprockets if you want bigger ones.
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Camdg2010
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PostSubject: Re: Tracked craftsman   Thu Apr 20, 2017 5:22 pm

i dont have the sprockets no, but i measured the distance from each run of sprocket holes in both tracks and from center of hole to center of hole is 9 inches on both tracks... i think thats standard for most snowmobiles. im looking for 4 9 inch wide rims, maybe i can find 9 inch wide tractor rims but i doubt it. and i know what you mean by the teeth, i will more than likely get all the way to the end and not have room on the rim for the last tooth.... but would it really make a big deal to be missing 1 tooth?
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Camdg2010
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PostSubject: Re: Tracked craftsman   Thu Apr 20, 2017 5:46 pm

ok so scratch that idea off the board. i just went to our tow yard and its gonna be hard to find 4 of the same 9 inch wide rims that dont weigh a ton... back to making track guides...
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PostSubject: Re: Tracked craftsman   Thu Apr 20, 2017 8:14 pm

@Camdg2010 wrote:
i dont have the sprockets no, but i measured the distance from each run of sprocket holes in both tracks and from center of hole to center of hole is 9 inches on both tracks... i think thats standard for most snowmobiles. im looking for 4 9 inch wide rims, maybe i can find 9 inch wide tractor rims but i doubt it. and i know what you mean by the teeth, i will more than likely get all the way to the end and not have room on the rim for the last tooth.... but would it really make a big deal to be missing 1 tooth?

Yes, it is a very big deal for the sprocket to fit in the tracks right. If one tooth is spaced wrong then it will pop the track off the sprocket completely and when it goes back into the teeth then it will damage the track from the shock, every time the sprocket makes 1 turn.


here is a link to a webpage that will give you an idea on the sprocket. click on the picture of the gears, then watch the video for the chain and sprockets.
http://woodgears.ca/gear/index.html
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prancstaman
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PostSubject: Re: Tracked craftsman   Thu Apr 20, 2017 8:33 pm

Looks like the tires fit inbetween the holes on the tracks. Leave the tires on the rims and have the track guides be bolted on the track on the outside and bent to fit through the holes going in maybe 2 to 3 inches. If the tracks are tight then the tires shouldn't slip on the tracks
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