Official Answer
Answer
Zurfin tsagi $d$ muhimmin siga ne. An bayyana shi da $d = \frac{D_{shaft} - D_{groove}}{2}$ (na shafts) ko $d = \frac{D_{groove} - D_{bore}}{2}$ (na bores). Kwanciyar zoben ya dogara da 'kashi alkawari', wanda shine rabon bangon radial na zobe $b$ wanda ke zaune a cikin tsagi. Tsagi mai zurfi yana ƙara ƙarfin turawa amma yana sa shigarwa ya fi ƙarfin kuma yana ƙara haɗarin 'matsi' zobe yayin haɗuwa. Mafi kyawun zurfin $d$ yana tabbatar da cewa ko da a ƙarƙashin iyakar haƙuri (mafi munin yanayi), zoben yana kula da aƙalla $50% $. Don ingantattun na'urorin likitanci, $d$ galibi ana adana ƙanana don rage sawun sawun, yana buƙatar amfani da zoben Beryllium Copper don kiyaye ƙarfin bazara a ƙananan karkata.
