Official Answer
Answer
Wurin da ke cikin ramin rami ya kamata ya kasance yana da kusurwar 'square' mai kaifi don samar da iyakar wurin tuntuɓar. Koyaya, duk hanyoyin sarrafa injin suna barin ƙaramin 'radius' ($ r$) a ƙasan tsagi. Idan wannan radius ya yi girma da yawa (misali, $r> 0.1 · t$), zoben zai 'hau' akan radius, wanda zai haifar da 'Dishing' da raguwa mai yawa a cikin ƙarfin turawa. Gefen zoben yawanci deburred ne amma ba radiused zuwa $0.005"$ max. Masu zanen kaya dole ne su saka iyakar izinin tsagi radius ($ R_{max}$) a cikin zane. A high-performance tseren injuna, da tsagi ne sau da yawa 'undercut' don tabbatar da zobe zaune daidai lebur da lodi-hali bango, ta maxiar.
