Run-in phase
The tooth flanks of new helical-worm and SPIROPLAN® right-angle gear units of the W..0 series are not yet completely 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 ratio.
During the running-in phase, the nominal efficiency of the gear unit is reduced by the respective value in the following tables.
| Helical-worm gear units | |
|---|---|---|
i range | η reduction | |
1-speed | Approx. 50 – 280 | Approx. 12% |
2-speed | Approx. 20 – 75 | Approx. 6% |
3-speed | Approx. 20 – 90 | Approx. 3% |
5-speed | Approx. 6 – 25 | Approx. 3% |
6-speed | Approx. 7 – 25 | Approx. 2% |
| SPIROPLAN® right-angle gear units W..10 to W..30 |
|---|---|
i range | η reduction |
Approx. 35 – 75 | Approx. 15% |
Approx. 20 – 35 | Approx. 10% |
Approx. 10 – 20 | Approx. 8% |
Approx. 8 | Approx. 5% |
Approx. 6 | Approx. 3% |
The run-in phase usually lasts 48 hours. 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.
