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Measurement of Gear Tooth Dynamic Friction

Authors: Brian Rebbechi; Fred B. Oswald; Dennis P. Townsend; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER
Abstract:
Measurements of dynamic friction forces at the gear tooth contact were undertaken using strain gages at the root fillets of two successive teeth. Results are presented from two gear sets over a range of speeds and loads. The results demonstrate that the friction coefficient does not appear to be significantly influenced by the sliding reversal at the pitch point, and that the friction coefficient values found are in accord with those in general use. The friction coefficient was found to increase at low sliding speeds. This agrees with the results of disc machine testing.

Limitations: APPROVED FOR PUBLIC RELEASE
Description: Technical memo
Pages: 11
Report Date: SEP 96
Report Number: A821813
Keywords relating to this report:
*GEAR TEETH
*Sliding friction
CALIBRATION
DYNAMIC LOADS
DYNAMIC TESTS
ELECTROHYDRODYNAMICS
FORCE_MECHANICS_
LOAD DISTRIBUTION
LUBRICATING FILMS
SHEAR STRESSES
STRAIN GAGES
STRAIN_MECHANICS_
TORQUE
TRANSMISSION GEARS
VELOCITY
VISCOELASTICITY
VISCOSITY
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