Flender/Flender Gear Units/Bevel-helical gear boxes B2
move the contact zone from the starting position to an extreme position and back. It can be enteredseparately for each

of the extreme positions. Reference values of 1.5 per0.1 mm of displacement can be used for gears cut with medium

to large toolradii, or 0.8.5 for small tool radii. Dwell time can be included at any desired point to increase

material removal. 6.6.5 Using Lapping to Change Running Properties The tooth ank topography of the pinion and wheel changes due

to uneven material removal. In typical automotive lapping process, lengthwise crowning is reducedby 3 % and prole crowning by 5 %. Besides reducing ank crowninglapping typically leads to bias-in behavior being advantageous for the runningproperties (see Sect. 3.4.3 ). Lapping usually reduces transmission error by 6 %. At the middle of the tooth, material removal is about 5 per tooth ank, which enlarges the contact pattern.6.6 Lapping 2 Roughness attained by lapping fundamentally depends on grain size and lapping time. As reference, roughness zin the order of 6 can be attained using 2 grain. Surface structure is oriented in the sliding direction, which can have advantages for efciency. References [BART0] Barth, .: Fra sen, Fliepressen und Sintern von Kegelra dern fu Power Tools Ein Wettbewerb der Technologien. Innovation rund ums Kegelrad ( [CZEN0] Czenkusch, .: Technologische Untersuchungen und Prozessmodelle zum Rundschleifen. Dissertation, Universita Hannover ( [DEGN0] Degner, .: Spanende Formung. Theorie, Berechnung, Richtwerte. Carl Hanser Verlag, Mu nchen ( [DIN-EN1] DIN-EN 1, Ausgabe 1-0: Begriffe der Wa rmebehandlung von Eisenwerkstoffen ( [FEPA0] FEPA: FEPA-Standard 4-1. FLENDER GRAFFENSTADEN fepea-abrasives.org ( [GIES0] Giemann, .: Wa rmebehandlung von Verzahnungsteilen. Expert, Renningen ISBN3-8-1-6 ( [HOFM3] Hofmannn, .: Gleason Spiralkegelra der. Springer, Berlin ( [KLOC0] Klocke, .; Ko nig, .: Fertigungsverfahren Band 2 Schleifen, Honen, Lappen. 4. Au. VDI, Du sseldorf ( [KREN9]