LENZE
7
Technical data - Helical-worm gearboxes
Start-up efficiency
7-7
L-force gearboxes en 06/2011
Ratio
Start-up efficiency
i
r
±
A
5.6
0.71
8
0.71
9
0.67
10
0.71
11.2
0.71
12.5
0.67
14
0.71
16
0.67
18
0.67
20
0.55
22.4
0.67
25
0.55
28
0.67
31.5
0.55
35.5
0.67
During start-up, the start-up efficiency
±
A
of a helical-worm
gearbox is lower than its operative efficiency
±
at rated
speed.
The start-up efficiency
±
A
must therefore always be
considered when starting under load.
The start-up efficiency is determined by the oil temperature
and the degree to which the tooth faces have been run in.
The values given in the tables are theoretical values and are
valid with a tolerance of ± 10%.
Ratio
Start-up efficiency
i
r
±
A
40
0.55
45
0.67
50
0.55
56
0.55
63
0.55
71
0.55
80
0.55
90
0.55
100
0.55
112
0.55
125
0.55
140
0.55
160
0.55
180
0.55
200
0.55