https://www.mrosupply.com/speed-reducers/96729853_30739135_boston-gear/
Boston Gear 30739135 F730F-30KZT-B7-J4 Worm Gear Speed Reducer 30:1 Ratio 3.0" Center Distance...
Boston Gear 30739135 F730F-30KZT-B7-J4 30:1 worm gear speed reducer, 3.0" center distance, 140TC input flange, right-side solid output shaft, cast iron housing.