Sobanura akamaro ka 'Surface Finish' (RA) ku buzima bw'umunaniro w'impeta izenguruka.

Impeta zigumana impuzu zometse ku nsinga iringaniye, isanzwe ifite ubuso bunoze, buzunguruka hejuru hejuru no hepfo. Ariko, 'impande' z'insinga zirashobora kugira ibimenyetso bitobora cyangwa burrs. Uku kudatungana kwubuso bukora nkibitera guhangayika (notches). Munsi ya cyclicale imitwaro, gucika umunaniro bitangirira kuriyi nenge. Kugaragaza 'vibratory deburr' cyangwa 'gutembera' kurangiza nibisanzwe kugirango woroshye impande. Kubisabwa byizunguruka cyane, hejuru yubuso bwa 16-32 micro-inches RA ireba. Byongeye kandi, kurangiza neza bigabanya ubushyamirane mugihe cyo kwishyiriraho no kuyikuraho, birinda 'galling' ya shaft cyangwa bore hejuru.