I am starting to think that a 15mm hole cannot be drill into a 20mm x 20mm Corian blank !! I am now on my third try and every one has split. I have drilled a pilot hole in each one...using the accompanying 11/32 bit that is used on the Empress kit ( which drills with no problems) before tackling it with the big guy, and have drilled ultra slow ..even ultra ultra slow with the last one, drilling no more than a couple of millimetres at a time ,then leaving it to rest for a few minutes ....but still they split .The slowest speed that I can drill on my lathe is 500rpm is this the reason or do I need thicker blanks, or should I just fling these crap Empress kits
I have darkened the photo so that you can see the problem . The blank on the left is the size of the pilot hole I'm using.
I have darkened the photo so that you can see the problem . The blank on the left is the size of the pilot hole I'm using.