Flat belts — Most of the general
principles of belt drive operation discussed
earlier apply to flat belt drives.
In calculating tension ratios for flat
belts, consult the manufacturer for
typical values of the friction coefficient,
f. For a flat belt drive, k = 1.
Several useful formulas for endless
belts follow (refer to Figure 4). For
belt length in an open belt drive:
L0=2C+1.57(d+D)+(D-d)square/4C
For Crossed belt Drive:
Lx=2C+1.57(d+D)+(D+d)sq/4C
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