cycloid toothing The epicycloid is obtained by rolling a pitch circle on a pitched line of engagement. It can be clearly seen how the addendum flank of the tooth of gear wheel 1 rolls off the dedendum flank of the tooth of gear wheel 2. description ordernumber 369 see also: hydraulics: connection diagram of a feed control roller-cell pump tool radius offset on a CNC-lathe quick clamping device, hydraulic