Grundfos challenge harmonic drive
grabcad
Harmonic drive ratio- 1:100 (easily scalable) Spur gear ratio 1:5 This pair significantly outperforms a worm gear system paired with multiple spur gears Efficiency is greatly enhanced Depending on the assembly demands, three spur gears can be used in place of two to provide better access to mounting holes from above or to increase the size of both spur gears, allowing for bolt installation through cutouts in the spur gear.
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