CNC Air Drilling

CNC Air Drilling custom pegboard

Drilling multiple holes will definitely result in the heating of your bit and eventually burning the material being cut. Slowing the router speed to approx 2000 rpms can help but most routers can't be set this low. When I was doing the CNC work for Robocop 2014 I had to drill 80 sheets of MDF with 5/16" diameter holes and spacing very similar to pegboard. Each sheet had between 8,000 - 10,000 holes and this would have killed the spindle I was using.  By using an air powered drill with automatic oiler and a very large compressor the task became possible and I was able to cut through 4 sheets at a time. In this case a vacuum hold down would not have worked. I decided to drill hold down holes and used screws and flat washers to keep the 4 layers of MDF from lifting and binding when the drill bit lifted out of each drill hole. Mission accomplished!