Slotting da Chamfering matakai 2 ne don sarrafa kushin birki.
Slotting kuma ana kiransa grooving, yana nufin sanya ragi da yawa akan
gefen abin gogayya na birki, da nau'ikan kushin birki daban-daban suna da lambar tsagi daban-daban.Misali, birki na babur yawanci yana da tsagi 2-3, yayin da birkin motar fasinja yawanci yana da tsagi 1.
Chamfering shine tsari don yanke kusurwoyi a gefen toshewar gogayya.Kamar slotting grooves, chamfering shima yana da buƙatu daban-daban na yanke kusurwoyi da kauri.
Amma me yasa waɗannan matakai biyu suka zama dole?A gaskiya yana da fa'idodi masu zuwa:
1. Rage amo ta canza mitar mitar mitar oscillation.
2. Slotting kuma yana ba da tashar iskar gas da ƙura da za a fitar da su a cikin matsanancin zafin jiki, yadda ya kamata yana rage raguwar ingancin birki.
3. Domin hanawa da rage tsagewa.
4. Ka sanya birki ya fi kyau a bayyanar.