![]() ![]() ![]() The smaller diameter shaft of your arbor chucked in the Jacobs chuck jaws is likely vibrating once under load, and I bet you have some runout at the face of the cutter because of it. I've run annular cutters in a hougen drill specifically set up for them a couple times, but have mainly run them in my mill, using an end mill holder directly into my spindle. An annular cutter machines it.Īt least as far as my limited knowledge of tool theory goes. A drill more or less chisels the material away. Being too, that the annular cutter needs to run very true and in a precise path, a standard twist drill wouldn't be nearly as affected as the cutter would be under the same circumstances. It doesn't take much to make a big change at the other end. Any lack of rigidity or runout at the jaws will be greatly magnified at the end of the tool. That, and the jaws of a drill chuck are designed to hold drills, not machining tools or arbors that hold them. I think that will give you the most rigidity for your current setup.003" at the OD of the arbor might not be concentric with the ID and even that amount will be magnified at the tool face once spinning. I'm not completely sure on the adapter, it looks ballpark to me, but I would check with the seller first to insure it has compatibility with Hougen cutters. Get a standard annular cutter adapter for the spindle of your drill motor. More rigidity is needed to support it and keep it from vibrating. Also, an annular cutter actually machines the material, while a twist drill acts more as a "chisel" if you will in comparison. Sure it'll work and I've done it more times than I can recall, but only with medium diameter tools and shallow cuts. Especially when subjected to side bearing loads. ![]() It's not going to hold it rigidly like a tool holder will. That's a reason it's not usually good practice to run an end mill in a Jacobs chuck. The jaws of a drill chuck can only grip it to a certain degree. Even the shaft of the arbor isn't very big by the looks of it. If you put an indicator on that cutter at it's leading edge, I bet you have runout. It's too long and loses rigidity being chucked in the jaws of a standard drill chuck. The adapter is creating runout and oscillation at the face of the tool. ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |