Spindle speed increaser, belt drive x 4

[sven_d]

Belt driven, water cooled spindle speed increaser using 4 deep groove ball bearings. Increases spindle speed x 4. Works a treat
Acad file is 2004dxf.

[Hood]

Very nice, tried to do something similar myself but gave up before I could get it right, cooling was the problem for me but looks like you have that sorted I tried the flood to cool things but as I had made the speeder up and added the coolant channels as an afterthought it wasnt very good.
Thanks for sharing.

Hood

[sven_d]

I overcame the heating problem (which was generated by the viton seal) by removing the spring and machining the seal so it only made contact by a fly-*********,
 still gets warm around 50c but not a problem.
sven

[RICH]

Good going and glad it suites your needs. Thanks for posting the drawing as that may someone a bunch of time.
RICH