Standard range - Belting Ware

22
Calculation
optibelt OMEGA HL/HP and optibelt OMEGA
Explanation of the symbols
a = centre distance [mm]
anom = centre distance, calculated using a standard
belt length [mm]
c0 = basic service factor
c1 = tooth in mesh factor
c2 = total service factor
c3 = speed ratio correction factor
c6 = fatigue correction factor
c7 = belt length correction factor
da = outside diameter of the timing pulley [mm]
dw = pitch diameter of the timing pulley [mm]
dwg = pitch diameter of the large timing pulley [mm]
dwk = pitch diameter of the small timing pulley [mm]
dw1 = pitch diameter of the driving
timing pulley [mm]
dw2 = pitch diameter of the driven
timing pulley [mm]
Ea = belt deflection for given span length [mm]
F = load to create deflection [N]
f = frequency for measurement using Optibelt TT [Hz]
i = speed ratio
L = drive span length [mm]
LwSt = standard pitch length of the timing belt [mm]
Lwth = calculated pitch length of the timing belt [mm]
n1 = speed frequency of the driving timing pulley [min-1 ]
n2 = speed frequency of the driven timing pulley [min-1 ]
P = power to be transmitted by
timing belt drive [kW]
PB = design power [kW]
PN = rated power [kW]
PÜ = actual transmitted power for standard
belt width [PN · c1 · c7] [kW]
Sa = minimum static shaft load when stationary [N]
Sn zul = maximum permissible circumferential load [N]
Sn3 = circumferential load to be effectively transmitted [N]
Sn = effective circumferential load to be transmitted
incl. actual centrifugal force [N]
t = tooth pitch [mm]
v = belt speed [m/s]
x = minimum adjustment of the drive centre distance
anom for tensioning the timing belt [mm]
y = minimum adjustment of the drive centre distance
anom for installation of the timing belt [mm]
ze = number of teeth in mesh on the small timing pulley
zg = number of teeth on the large timing pulley
zk = number of teeth on the small timing pulley
zr = number of teeth on the timing belt
z1 = number of teeth on the driving pulley
= number of teeth on the driven pulley
z 2