NEW! Faster Search Option
I recently purchased the Delta 14-651 hollow chisel mortiser for a bed I am building. I started putting 1/2" square holes just over 1' deep in one of the pieces last night and noticed that the bit got quite hot after only a couple of holes. I am wondering if I have it set up properly or if that is to be expected in hard wood such as the read oak I am using.
The center drill bit that came with the machine has a center point, a scoring point on the outside edge and a planing/scraping point/surface to clean the bottom of the hole. I apologize if I am not using the proper terms but I hope the description is adequate. The manual seems to indicate that the planing/scraping point/surface should be between 1/16 and 3/16 below the tips of the square chisel that surrounds the bit. I have it adjusted to about the middle of that range. This leaves the center point and the scoring point quite a bit below the chisel points. Does that sound about right.
I also notice that I have to pull down pretty hard on the handle. It is quite big and beefy but I never like forcing things. Any tips are appreciated.