GD41B Cast Iron Change GearBoston 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

Click here for spec sheet: UCPL Spec Sheet

Center Distance: 2

for a nearly infinite number of ratio possibilities

and web with spokes

Click here for spec sheet: NAT Spec Sheet

and cast iron and are manufactured in a variety of styles

Note: SNA bearings not in catalog

stem pinions

Click here for spec sheets: CUCNPFL Spec Sheet

Click here for spec sheet: SA Spec Sheet

ANGULAR DISPLACEMENT — Single 45° — Double 90°

see SNA vs SUC pages for bearing insert dimensions)