I need to do a lot of deep holes in UHMW material. Generally, these holes are 5/16" dia (loose tolerance) by 6" deep...sometimes deeper.
Using standard style long drill bits works ok..but there is a lot of pecking and the stringy chips tend to bind etc. I was wondering if anyone out there had any ideas for speeding up this process? Also, UHMW tends to dull bits fairly quickly. It's not terrible and 5/16" drills are easy to re-sharpen..but it would be nice to reduce this a bit. Carbide tips hold up ok, but it's hard to get the nice sharpness that UHMW likes to see when using carbide material.
Thanks for any ideas
Koz