Changewheels (and metric to inch and inch to metric transposing gears) to fit Boxford and other South Bend 9-inch Clones (e.g. Hercus, Purcell, Smart & Brown Sabel, Blomqvist, Storebro, etc) All are 18 D.P. with a 14.5-degree pressure andlge and 0.125" depth of tooth. They are 3/8" wide, have a 9/16" bore, and have a 1/8" keyway. The idler and compound gears (two gears on one shaft) are different: they have a 5/8" bore with no keyway and are fitted to a hardened bush held in place with a through bolt.