Re: [CAD_CAM_EDM_DRO] Timing Belts and Pulleys

On Sun, 19 Nov 2006 18:42:32 -0600, you wrote:

>Steve Blackmore wrote:

>>I just chuck them in the "Griptru" or 4 Jaw, clock the bore central then
>>bore them out.
>>

>If the original bore is off-center, then you have made an eccentric
>pulley. Not a good idea where
>positioning accuracy is important. On a number of pulleys, the runout
>of the bore was
>CLEARLY visible! So, I either use an indicator on the major OD or
>something that will
>guarantee centering the teeth. Also, on flanged pulleys you can't
>assume the flanges
>are concentric to the teeth.

I'd stop buying off that manufacturer Jon, and buy concentric pulleys.

Steve Blackmore
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