b'radial runout is the primary con-tributor to oversize holes. Eliminat-ing runout can be done in a cou-ple of ways, beginning with making sure the reamer is held in the best method possible. In some cases, this means using a good collet. In other cases, this might necessitate a high-quality chuck. No matter how it is held, if the reamer wob-bles when it spins, you likely will end up with an oversize hole. One of the more creative solutions I have seen for combating runout is holding the reamer in a boring head so the reamer can be dialed in.Runout of the reamer is only a problem when the reamer rotates ctemag.com/cteguide.com37Reaming.indd 37 9/19/22 2:23 PM'