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always remember that the difference in the number of teeth between the internal gear and pinion should not be less than 15 (14 1/2° PA) or 12 (20° PA)
Click here for spec sheets: BUCNPFB Spec Sheet
full-depth system gears
Because Boston Air Motors go to work with air-cushioned smoothness they cut stress on your equipment
Max PV Value: 75
NAR8 Steel Stem Pinion 20 Degree Pressure Angle always remember that the differenceBoston 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
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