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RN-RO-RV Gearboxes
SERVICE FACTOR of the gearbox
Service factor FS1.0 is meant as typical of 8 hours/day operation, with uniform load and mass acceleration factor k
(a)
0.2, starts/ stops lower than 300 per hour and ambient temperature between 15 and 35 Celsius.
The performance shown in the tables gives the service factor calculation as a ratio between gearbox maximum output
torque M
2
and application torque M
(app)
.
Mass acceleration factor
Load Class
A - Uniform load
k
(a)
0,2
B - Moderate shock load
0,2 < k
(a)
3
C - Severe shock load
3 < k
(a)
10
A/h - Number of starts/stops per hour
m
1
2
(a)
J
J
ir
J
k
2
Service factors