Re: Disc Construction

• To: tesla-at-pupman-dot-com
• Subject: Re: Disc Construction
• From: NickandSim-at-aol-dot-com (by way of Terry Fritz <twf-at-verinet-dot-com>)
• Date: Thu, 29 Apr 1999 08:19:40 -0600
• Approved: twf-at-verinet-dot-com

Hi Reinhard,
                  why use G-10? At 1500rpm you could make the rotor out of 
plywood and it would stay together (remember the square function in the 
centrifugal force equation).  
If you're running faster than that a good way the keep discs together is to 
build a disc holder like the one below
(use courier to view)

     X
     X
   /|X|\
   ||X||___ 
 =====| ___> to motor          
   ||X||
   \|X|/
     X
     X 
XXXX=disc material ==== threaded rod of diameter of your choice

all other lines indicate boundary of material you machined this from

This spreads the load of centrifugal force around a much wider conatct area 
than if you just epoxied or keyed the disc to the shaft.

Nick Field 

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