Jul 23, 2021 July 23, 2021 Written by Mike Gunski. SPS Spindle repairs and services a wide variety of spindles styles including centerless grinding spindles. While they are not one of the more common spindles we see on a daily basis, we have the expertise to handle this unique spindle. Centerless spindles feature a regulating wheel spindle with a rubber wheel and another spindle running parallel to this with the grinding