live axle

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squat251

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ok, what is the cheapest way to aquire a 1" keyed drive shaft? I've put my trike on hold to build a friend a cart, and I would like to use a live axle, but where do i get one for cheap/ what can a take it off of to get it free?
 

squat251

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cool, see my wife just got back from Iraq and i haven't told her about the trike, so I'm building my friend a cart (traditional 4 wheels) with the same engine, and what I'll do is put the secondary pulley onto the live axle to save time.

tell me what you guys think about this, i plan on making the frame (the "base" of it) out of 1-2" steel threaded pipe with 90* angle pieces on the corners. from there (the back of it) I'm going to put on a swing arm, and build a roll cage out of 1x1 square tubing to mount the swing arms shocks to. FYI i will be welding around the threads, as i see that to be a weak point as the pipe is thinner there.
 

squat251

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well, its not really a torque converter, its the secondary pulley off a snowmobile engine, and I've thought about the whole oh noes loss of power cause of the lack of jackshaft gearing, but i think with the power of the engine, and the overall lightness of the cart its self, i shouldnt have any problems
 

Kaptain Krunch

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Yes it will have problems. A 1:1 ratio is BAD, you wont go anywhere, i dont care how powerful the engine is, you NEED a jackshaft.

By the way, snowmobiles use torque converters, so yes it is. I hope your using the primary clutch also, if not the secondary will start to open up and then the belt will just slip.
 

squat251

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well its a good thing that its not 1:1 then huh? the secondary on a snowmobile is rather large in comparison to the much smaller main drive, I'm pretty sure you have seen this, if not, i can post some pictures. unless my mind isnt letting me see something here, that should be around 2-3:1 not amazing, but it gets a little better
 

Kaptain Krunch

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well its a good thing that its not 1:1 then huh? the secondary on a snowmobile is rather large in comparison to the much smaller main drive, I'm pretty sure you have seen this, if not, i can post some pictures. unless my mind isnt letting me see something here, that should be around 2-3:1 not amazing, but it gets a little better

Do you know how i torque converter works? The two pulleys constantly change size, and although it may start out at 3:1 or so, at peak rpm it will be 1:1, or on some torque converters .75:1 or more.

Listen buddy, its not going to work, but if you want to be stubborn go ahead and fail, but dont tell me i didnt warn you.
 

squat251

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okay, but at peak power, its going to be driving the drive wheel which would have broken free of the friction that held it/them in place so the 1:1 will be at peak snowmobile engine speeds, right?

hmm, but even that statement makes it less sure...it will have very little torque, i would just burn out the belt...
 

Kaptain Krunch

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1:1 at sled engine peak (atleast 8k), with even 15" tires will have a calculated speed of over 400mph, and thats not realistic.
 

squat251

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yeah, no torque to keep it up, it would jerk forward, then the main would spin burning out the belt
 

squat251

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what tooth sprocket do you recommend for the jackshaft and the main drive shaft?

and sorry about that, ive been awake going on 72hrs so my mind is a bit frazzled
 

Kaptain Krunch

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Exactly, aim for 4:1 or 5:1 gear reduction at peak rpm. So secondary on jackshaft with chain too back tire, 10 tooth sprocket on jackshaft and a 40/50 on axle

Didnt i already argue with you about this?.
 

squat251

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its possible only it was the gearbox from the sled on that one, which so you know does work I got a chance to see it in action (and ride in seat 2) it works nicely im not sure what the ratio is though
 
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