On April 11, comparative tests for the development of a two-stage spur gear 5TS2-125-12,5 with involute and EC-gears were completed.
The operating time of gearboxes was carried out with parameters on water - 1500 rpm and 450 Nm.
- Involute gearbox - the destruction of the teeth of the second stage occurred after 300 minutes of operation.
- EC-reducer - the intermediate shaft was destroyed, the EC-engagement remained intact.

Results of comparative tests.
At KAMAZ, comparative tests of two gearboxes were performed - with involute and EC-gearing. The test period: March 25 - April 11, 2019 Involute gears polished: 5-6 cl of accuracy. EC-gears processed blade: 7-8 cells. accuracy.

The advantage of EC-gearing:
1. The temperature of the gearbox is 6.5 degrees lower.
2. The efficiency is 2% more.
3. The operating time at the two-time input moment (450 Nm) involute teeth broke after 300 minutes of work, and in the EC-reducer after 404 minutes the intermediate shaft collapsed, while the EC teeth remained intact. Earlier, during comparative tests for the ultimate moment in the Krylov Center in the EC-reducer, the body collapsed, and the EC-gears remained intact (this was 30% more than the input moment after the destruction of the involute gears). 4. Noise and vibration are comparable. (when grinding EC-teeth, noise and vibration in EC will be less).

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