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#2
04-15-2011, 08:05 PM
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There is the classic belt tensioner setup- 2 pulleys with a loose belt and a idler pulley mounted so it can swing and tension the belt when you want to go. This setup is only cheaper if you have some junk pulley laying around. You can get a nice max- torque centripetal clutch off ebay for $40 with a chain. A centripetal clutch is in my opinion the best CHEAP solution for a clutch.
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#3
04-15-2011, 08:07 PM
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This should help you out, this website is great an Ive purchased stuff from them before.
http://www.gokartsupply.com/clutches.htm
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#4
04-15-2011, 09:03 PM
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well, unless you have acess to milling machines and a lathe its not even worth it.
it would take ALOT of engineering and planning, and mostly testing too to get the right engagement settings and stuff. good thing for you, they are already mass produced lol i bought a #40/41 clutch off ebay for $20.
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#5
04-15-2011, 09:41 PM
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There's belt tensioner clutches, as mentioned earlier. Simple, cheap and easy to make.
I once saw a centrifugal clutch made from a car brake drum, very clever, wasn't balanced very well though and weighed a ton.
__________________
"If everything seems under control, you're just not going fast enough."-Mario Andretti 
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#7
04-16-2011, 06:25 PM
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Okay, I think I'll jsut use the belt tensioner set up beause I have alot, and I mean alot of pulleys lying around. I just didn't want to bring the 7/8 shaft on my 3hp to 3/4.
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#8
04-21-2011, 10:28 AM
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I've got something experimental going on with a magnetic clutch used for driving a mower deck on lawn tractors.
You can follow that thread in this section and see if it works out. If it does, it will be an exceptionally powerful, nearly free clutch. I've got 3 of these things and haven't paid a dime for any of them
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#9
05-03-2011, 01:24 PM
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I need to make a clutch too, but the pulley tensioner at the top of the page won't work from cuz the engine I have(4.75 HP Power Washer Engine), the shaft that turns is facing downward and I cannot place the engine on it side with out it choking and other numerous problems such as the gas tank leaks if it is placed ion it's side, any suggestions?
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#10
05-03-2011, 02:49 PM
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Quote:
You could find a gearbox off a ride on mower or something.
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#12
05-10-2011, 08:03 PM
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Do not use a worm gear box, if you do, you will not be able to coast after letting off the throttle. You can drive a spur gear with a worm gear, but you can not drive a worm with a spur. If you use a worm gear box, the minute you let off the throttle, your rear tires would lock up.
If you doubt this, and you have one of these boxes, just try turning the output shaft in an effort to watch the input shaft turn. You will find it locked solid, and you will not budge it an inch outside of any pre-existing free play present in the box.
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#13
05-10-2011, 08:38 PM
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On my belt tensioner, i run a mower tranny, so i have 5 speeds and reverse. Set it to neutral, get out and start the engine, jump back in and push the clutch that i also hooked up to the brake, shift into first, let go of brake/clutch.
Its slow enough to start from 5th gear, i just have to let go of the clutch slowly or else if i just take my foot right off, it puts so much load on the engine it almost dies. Works pretty good. Ill post pics if youre interested but i have them in my thread. Find it searching through my threads. Its a 6hp vertical shaft briggs mower engine and a 5 speed peerless/tecumseh transaxle.
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