10
Project planning
MOVIMOT® advanced
Operating Instructions – MOVIMOT
®
advanced
230
Run-in phase
The tooth flanks of new helical-worm and SPIROPLAN
®
gear units are not yet com-
pletely smooth. This makes for a greater friction angle and less efficiency during the
run-in phase than during later operation. This effect intensifies with increasing gear
unit ratio.
During the running-in phase, the nominal efficiency of the gear unit is reduced by the
respective value in the following tables.
Worm
i range η reduction
1-start About 50–280 Approx. 12%
2-start approx. 20–75 approx. 6%
3-start approx. 20–90 approx. 3%
5-start approx. 6–25 approx. 3%
6-start approx. 7–25 approx. 2%
SPIROPLAN
®
W10 to W30 SPIROPLAN
®
W37 to W47
i range η reduction i range η reduction
approx. 35–75 approx. 15% – –
approx. 20–35 approx. 10% – –
approx. 10–20 approx. 8% approx. 30–
70
approx. 8%
approx. 8 approx. 5% approx. 10–
30
approx. 5%
approx. 6 approx. 3% approx. 3–10 approx. 3%
The run-in phase usually lasts 48 hours. Helical-worm and SPIROPLAN
®
gear units
achieve their nominal efficiency values when the following conditions have been met:
• The gear unit has been completely run-in.
• The gear unit has reached nominal operating temperature.
• The recommended lubricant has been filled.
• The gear unit is operating in the nominal load range.
Operation at motor speeds above 1800min
-1
SEW-EURODRIVE recommends using oil seals on the A- and B-side made of fluoro-
carbon rubber for motors and gearmotors operated on frequency inverters at motor
speeds above 1800min
-1
.
25891936/EN – 05/2020
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