Dave wrote:
Aaron,

I also have a 10" Seneca Falls Star lathe. My pulley sheaves are
1-1/4" wide, and I use a 1-1/4" belt, which has worked fine. The
smallest pulley sheave, where the belt might otherwise get pinched, is
actually about 1-5/16".

Thanks everyone for all the good information about the belts and
adjusting the spindle. Hopefully I'll get the lathe working
this weekend.

-Aaron