NJR8 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

Click here for spec sheets: SUCSF Spec Sheet

Click here for spec sheet: UCHA Spec Sheet

Max V Value: 300 fpm

Click here for spec sheets: SNATF Spec Sheet

you can count on us to deliver what you need when you need it

Straight/Spiral Tooth: Spiral Tooth

Boston Gear’s precision-machined J and JS Series universal joints

Fan Cooled Rating: No

Click here for spec sheets: CUCNPFCS Spec Sheet

Bearing insert with 2 set screws has longer inner race for added load support

Click here for spec sheet: SAP Spec Sheet

expanded air cools the motor