Popcorn
02-26-2004, 03:54 PM
quote"
I drill the threads out for the non threaded tenons. I drill them one drill size at a time up to 5/16s. I don't know if it is necessary, but suspect that it might be best. I would be curious to know how difficult it would be to drill and thread solid rod.
"
Here is a picture of one of the bits I use to drill ferrules. You just grind off the tip and sharpen the remaining part to an edge. The cutting is done with the front of the bit so keep it razor sharp, (all your tools should always be razor sharp). You also need to grind a relief starting about an 1/8 of an inch back, for about an inch. You can do this with a dremal tool by running the bit in a drill or lathe as you grind. It is also important that when you grind off the tip you keep the diameter. The cutting is done by just one edge and the other side acts as a guide to maintain the proper hole size. To drill the ferrule just drill a pilot hole and then bore out the to size. After you bore you will find the bit is not even warm. and you will have a nice flat bottom hole. Good luck.
http://simplealbum.com/m/a/machineguycomcastnet/default.dir/thumb/bit.jpg
I drill the threads out for the non threaded tenons. I drill them one drill size at a time up to 5/16s. I don't know if it is necessary, but suspect that it might be best. I would be curious to know how difficult it would be to drill and thread solid rod.
"
Here is a picture of one of the bits I use to drill ferrules. You just grind off the tip and sharpen the remaining part to an edge. The cutting is done with the front of the bit so keep it razor sharp, (all your tools should always be razor sharp). You also need to grind a relief starting about an 1/8 of an inch back, for about an inch. You can do this with a dremal tool by running the bit in a drill or lathe as you grind. It is also important that when you grind off the tip you keep the diameter. The cutting is done by just one edge and the other side acts as a guide to maintain the proper hole size. To drill the ferrule just drill a pilot hole and then bore out the to size. After you bore you will find the bit is not even warm. and you will have a nice flat bottom hole. Good luck.
http://simplealbum.com/m/a/machineguycomcastnet/default.dir/thumb/bit.jpg