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Description / Abstract:
FOREWORD
The original design of precision roller chain dates back to the
late1 890s, although various types of drive chains have been in use
for centuries. The early automobiles used roller chain extensively
as the final drive.T he industrial use for roller chain grew
substantially, resulting in the desirability of standardization.
The perfected American Standard Chain of today has evolved to meet
the demand for ever increasing horsepower and higher speeds as well
as accurate timing.
In 1913 the Society of Automotive Engineers published formulas
for calculating the roller chain length, sprocket tooth profiles,
and other important design criteria. Recommendations from the
Roller Chain Committee of the American Society of Mechanical
Engineers followed in 1917 with dimensional standards for the
various components and assemblies. Early in 1920, through the
cooperation of these two groups, roller chain standards were
formulated and recommended for acceptance by industry. The progress
was followed in 1921 by organization of a sprocket committee
ofthe American Gear Manufacturers Association.