Gears that aren’t properly chamfered and deburred can lead to overloaded edges and unanticipated and undesirable noise. This is particularly true in EV applications where torque transmission, unlike combustion engine vehicles, goes from zero to a much higher maximum almost instantly. As a result, EV gears require hard finishing (honing and threaded wheel grinding), and chamfering/deburring becomes critical. 

Horn recently announced another milestone in the history of the Supermini with a sintered chip-breaking geometry for the Supermini type 105. Boring, profile turning, internal grooving, threading, chamfering, face grooving, drilling and slot broaching: The Supermini tool system can be adapted for numerous machining operations. 

Manufacturers of EV drive systems are leaving no stone unturned in their quest for quiet-running, dependable transmission gears and shafts. Where once chamfering and deburring operations were almost an afterthought, they’re now considered a primary soft machining process, with widespread recognition that anything less than a flawless tooth flank can result in premature transmission failure, less-than-optimal efficiency, and unacceptable noise.