Answer
Maɓuɓɓugan igiyar igiyar ruwa suna faɗaɗa kuma suna yin kwangilar radially yayin kowane zagayowar. Idan ƙarancin saman $R_a$ yana da girma (misali, $> 125 μin $), diamita na waje na bazara zai fuskanci lalacewa. Wannan ɓacin rai na bangon radial $ b$ yana rage ƙimar bazara bisa ga $ K ∝ b$. Bugu da ƙari kuma, gogayya yana ƙara yawan zafin jiki na aiki, wanda zai iya hanzarta shakatawa a cikin kayan kamar SAE 1070. Don aikace-aikace masu girma (misali, $> 10 ^ 6 $ hawan keke), ya kamata a yi honed zuwa ƙare na $ 32 μin $ ko mafi kyau. A cikin famfunan mai na sararin samaniya, inda ake amfani da maɓuɓɓugan ruwa na $17-7PH$, sau da yawa ƙusa yana da ƙarfi-anodized ko kuma an rufe shi da busasshen mai mai don rage wannan juzu'i da hana haɓakar tarkacen ƙarfe na ƙarfe wanda zai iya toshe tsarin.
