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[Probable Spam] Reducing a hole diameter? (alternator pulle

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larry(at)macsmachine.com
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Posted: Sun Mar 07, 2010 4:26 pm Post subject: [Probable Spam] Reducing a hole diameter? (alternator pulle

Hi Michel,

I think I've done this at one time too. The logical thing would be to 

cut a larger hole to eliminate the key and do a press fit flanged

insert. Then cut the key again. The second alternative would be to make 

a flanged center piece that you could bolt into the pulley

and have the hole and key at the ready on assembly. In the second 

alternative, you'd only need to thin the section down and make a

good centering thin flanged insert. Doing anything with welding would 

deform the piece, so I'd avoid temperatures that high. Tho a

thermally done interference fit could be useful.



Best regards,



Larry McFarland  601HDS at www.macsmachine.com



Michel Therrien wrote:

 	  Quote: 	
		   Hi folks (especially those of you that are machinists 



 I made pulley for my alternator from an aluminum plate.  I have a lathe, but I'm far from being a machinist.



 I was pretty proud of me until about half an hour ago.  I made the center hole about .003 to .004 to large in diameter. (ouch!) (I cut .0015 to .002 too much).  Now, the pulley is pretty slack on the shaft. Is there a good way to make it the proper size (adonizing, other means) that will be  reliable... or do I need to start over and use this one as a failure trophy in my workshop?



 Thanks!



 ----------------------------

 Michel Therrien CH601-HD, C-GZGQ

   http://mthobby.pcperfect.com/ch601

   http://pages.infinit.net/mthobby

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