In view of these challenges, the eccentric cycloid gearing (EC gearing) investigated in the FVA 864 I research project could potentially enable improvements. EC gearing features convexconcave tooth contact, resulting in low contact pressures at the tooth flanks. According to initial calculations, this lower contact pressure enables lower power losses compared to similar-sized involute gearing. Furthermore, the geometry of EC gearing allows for significantly higher transmission ratios compared to involute gearing, as there is no minimum number of teeth for the pinion in EC gearing. In extreme cases, single-tooth pinions are theoretically possible with EC gearing. Therefore, the use of EC gearing in high-ratio multi-stage gearboxes could enable the reduction of the number of stages without significantly increasing the space requirements. However, the influence of high speeds on the power loss of EC gearing has not yet been investigated. Furthermore, it is not yet known how the load-bearing capacity of EZ gears can be assessed for designing gears.

As part of the project, an analysis will be conducted to examine the influence of geometric parameters on the performance of high-ratio EC gearing. To investigate the manufacturing of EC gears, test gears will be manufactured using conventional methods (gear hobbing, heat treatment, hob grinding). The manufactured test gears will be used to experimentally investigate the highspeed efficiency of the EC gearing. In addition, the pitting and scuffing load capacity of EC gearing will be experimentally investigated to determine whether knowledge on these types of damage in involute gearing can be transferred to EC gearing.