Re: [CAD_CAM_EDM_DRO] Timing Belts and Pulleys

Jon Elson wrote:

>
>>
> the pulleys will give an absolute 2:1 ratio over the long term.
> Depending on
> how accurately the hubs are bored, there may be some small cyclical error
> every turn. That's why I always buy the pulleys with undersize bores and
> bore them up to whatever size I need. I turn rings out of aluminum scrap
> that have an exact ID to match the pulley's OD, then split the rings.
> The OD
> of the ring is not important, but I turn it on the same mounting so that the
> ID and OD are perfectly concentric. I put these around the pulley when
> mounting in the lathe, so the pulley is held very accurately concentric
> to bore
> the ID.
>
>

Jon you need to make yourself some softjaws, much easier ;)

>
>

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Wayne M Weedon Email: wayne@...
Fdos Design Poole UK
Tel +44-1202-677025 Fax +44-1202-770515 Mobile: 07774 439915

Specialists in small batch & Production Mechanical/Electrical Engineering
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