NFR6 Steel Stem Pinion 5.50" ID Step Down Adapters are ideal

Step Down Adapters are ideal for making the shaft smaller

They are also the smoothest

run satisfactorily with all other standard 14 1/2° PA spur gears

Nylatron® GS is dark gray in color

NFR6 Steel Stem Pinion 5.50" ID Step Down Adapters are idealBoston Gears stem pinions feature small numbers of teeth that are cut integral to the steel shaft. Using a special, enlarged pitch diameter minimizes the undercutting of the teeth. When run with standard stock spur gears, stem pinions increase the ratios normally found in spur gear drives. Please note: Stem pinions are not intended to be operated with each other, with internal gears, or with eleven tooth spur gears. They will, however, run