Chuck Size For 10" Swing Lathe | The Hobby-Machinist
2.13..Logan supplied a 5" 3-jaw chuck and a 6" 4-jaw chuck for their 10" lathes. Logan supplied a 6" 3-jaw chuck and a 6" 4-jaw chuck for their 11" lathes. Larger chucks were available, but they are impractical on these lathes because the jaws would hit the bed when the chucks were opened.