Router can cut accurate circle templets.
Index the templet to the MDF, waste most of the disk with a jigsaw,
then trim to templet with assorted trimmers or straight bits and
collars.
Good starter router :
http://patwarner.com/621_offset.html
************************************************** **********************


On Apr 23, 3:32 pm, woodman"
wrote:
I need to cut many 3 in. and 6 in. holes in 1 inch MDF. I figure on
using a template and cutting on a shaper or router table ( my shaper
goes to 10K rpm) I am not sure what type of bit to use.
It would have to be bearing guided. Any input would be welcome
Thanks
Woodman