I am trying to replace my quill bearings. The lower bearing I removed with a bearing puller, but needed to press of the upper bearing, due to the length of the splines on the spindle. When starting to press, the inner race started to peel off the splines. It appears to sit against a machined shoulder so the bearing can ONLY slide over the splines. Is that "shoulder" instead a collar that slips over the spindle to separate the bearings?