NJR5 Steel Stem PinionBoston 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

Keyway: No

Click here for spec sheet: HUCNPP Spec Sheet

Little maintenance

Click here for spec sheets: UCFCF Spec Sheet

KWY/Setscrew/Other: 1/8"Bore= #2-56 setscrew

4-Quadrant drain holes to remove internal condensation

Click here for spec sheets: SUCSFL Spec Sheet

Get maximum horsepower with minimum size and weight

Boston Gear manufactures both 14 1/2° and 20° PA

Type: Cored Bar

expanded air cools the motor

No-shock starts