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Mini Fabrication Mini Choppers, Mini Sandrails....Pint sized anything Fabrication


Mini Fabrication Mini Choppers, Mini Sandrails....Pint sized anything Fabrication

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  #1  
Old 05-31-2007, 02:39 PM
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Tapered Shaft on Motor

I'm gonna build a couple motorized coolers. The ones that Bass Pro Shops sell are electric but I'm gonna make some gas powered ones. I've got a good 6.5hp engine off of a Generac generator, but its got a tapered shaft. I've searched high and low for a clutch to fit the shaft, I called Comet Clutches, but nobody seems to make one. Other than Custon machine work, does anyone know of a way to mate this motor up to a clutch?
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Old 05-31-2007, 04:41 PM
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You could always run a pulley or sprocket off the motor to a jackshaft?????
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  #3  
Old 06-01-2007, 08:33 AM
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You know where I could find a sprocket to fit that taper?
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Old 06-01-2007, 10:32 AM
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Can you take the coupler off the generator and weld a sprocket to it?
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Old 06-01-2007, 11:09 AM
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Theres not really a coupler, the rotor of the generator fits up on the tapered crankshaft. But, I guess I could try cutting the rotor up and welding a sprocket to it. That might just work. Any suggestions on making sure its square when I weld it, other than having straight cuts?
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  #6  
Old 06-01-2007, 11:33 AM
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KEGGER1454 KEGGER1454 is offline
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tack weld it....start the motor up.....see how far off you are and adjust from there. (make sure u tack it good though...nobody likes a raging sprocket to the head trick!)
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Old 06-01-2007, 11:40 AM
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Machine the coupler and the sprocket so that the sprocket buts up against a shoulder, then clamp it in a vise.
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Old 06-01-2007, 02:44 PM
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Hell id have a custom adapter made. the machine shop I work for only charges 20 bucks an hour. you should be out no more than a hundred bucks. then if the project goes to the mothballs (like so many of mine) the motor is still usable.
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Old 06-01-2007, 05:13 PM
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For $20.00 a hour I would have a lot of machining done. That's real cheap, hell they charge around $60.00 plus where I am.
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Old 06-01-2007, 05:27 PM
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Quote:
Originally Posted by therail View Post
Hell id have a custom adapter made. the machine shop I work for only charges 20 bucks an hour. you should be out no more than a hundred bucks. then if the project goes to the mothballs (like so many of mine) the motor is still usable.
WTF do you work? I've always been quoted a hell of a lot more than that! I stay way away from machined parts for that reason.
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  #11  
Old 06-01-2007, 08:18 PM
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The physics dept machine shop at OK state Univ. We are primarily a prototype shop for the physics and chem depts. But we will do any work that walks through our door, especially this time of year, it kinda slow. Its all manual machines though, so no super trick stuff. There are 2 full time guys and me there, those two turn out some very nice pieces. We do mainly alum and stainless, with a lot pure molybdenum. Turning a tapered shaft for that motor would be no prob.

Last edited by therail; 06-01-2007 at 08:21 PM.
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  #12  
Old 06-01-2007, 08:27 PM
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Just go buy a tapered reamer for $30 bucks with the same OD and degree and ream the sprocket to fit on the shaft then weld it. Or thread the end and use a nut to hold it on. The tapered interference fit will handle a lot of torque.
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  #13  
Old 06-04-2007, 09:20 AM
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Well I got the rotor shaft out of hte generator, and it turns out it had a necked down part at the end that was 3/4", so I got a sprocket to fit it and welded it on. The rotor is close to a foot long and hollow, so I hope it'll hold up we'll see. I might try reaming a sprocket though, it would save me a lot of space since I'm gonna have that rotor that sticks out a foot on there.
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  #14  
Old 06-05-2007, 12:32 PM
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I pulled the crank and set it up between centers in my bench lathe, ended up with 2.200" of straight 3/4 shaft. I fit a comet clutch and drilled detents for the set screws to sit in,(didn't want to drive across town to mill the keyway longer) Be very careful of the seal surface. LGWFLLT... (looks good, works fine, last long time) Total cost was the price of a new case gasket. Paul P.S a week or so after I turned my crank down, I found a new crank, with a straight shaft, at Tom's small engine repair, online, for $31.00, just a thought, swapin' out the crank is a POC. Paul

Last edited by REDcaddy; 06-08-2007 at 01:04 AM. Reason: think slow, type fast.
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  #15  
Old 04-05-2008, 07:46 PM
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Quote:
Originally Posted by therail View Post
The physics dept machine shop at OK state Univ. We are primarily a prototype shop for the physics and chem depts. But we will do any work that walks through our door, especially this time of year, it kinda slow. Its all manual machines though, so no super trick stuff. There are 2 full time guys and me there, those two turn out some very nice pieces. We do mainly alum and stainless, with a lot pure molybdenum. Turning a tapered shaft for that motor would be no prob.
Can you tell me if OSU stii does this type work for walk ins. Do they work on Saturdays ? Been a long time since I have been on a campus. Is access controlled ? thanks tdarden3k
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