I'm building an engraving spindle using a high speed bldc motor made for a model airplane. Today I'll be testing the first iteration at about 14,400 rpm. This is the highest speed my motors will go. If the test goes OK I'll be buying higher speed motors and will need bearings. My plan is to use ER8 collets in an ER8 holder that has a
10mm OD. So the ER8 holder will be the spindle. Which means the bearings will have a 10mm ID and a max OD of 30mm in order to fit into the spindle housing which will fit into a 1.5 ID tool holder. I think what I want is a couple deep groove bearings. The axial and radial loads will be small but the RPM so high that the dynamic load may be high. I will try using the load calculator at the SKF website but would also appreciate advice from folks here who do this kind of thing and can steer me in the right direction. Even though the SKF website has all sorts of great info I have been unable to find an SKF ball bearing catalog online. I need this in order to plug the right SKF part number into the bearing calculator. Thanks, Eric- posted
10 years ago