GD81A Cast Iron Change Gear 3.75" ID Catalog Product Section

Catalog Product Section

Many are available with or without hubs

Step Up Adapters are ideal for making the shaft larger

and most come with a selection of bore diameters

GD81A Cast Iron Change Gear 3.75" ID Catalog Product SectionBoston Gear change gears are used primarily on machine tools to provide different cutting speeds while using a constant speed input. All Boston Gear change gears are manufactured with a double key to accept the compound steel bushings that connect two gears together, allowing them to spin on an intermediate shaft. The change gears we stock range from 20 tooth through 128 tooth gears, in one tooth increments, depending upon the diametrical pitch, for a