I happen to have my 6V starter apart. Here's some pics and measurements of the shaft. There's no sleeve that the gear rides on. SuziQ's measurements are actually on the shaft. There's a stepped down portion that goes into the nose of the housing. Don't beat me up on the accuracy with the caliper. I was doing it one-handed.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.