Rubutun mai gajeriyar haɗin gwiwa ne, yana haifar da wannan al'amari saboda gazawar injina na ciki kamar abin nadi ko shaft eccentricity, ko wuce kima na walda, ko wasu dalilai.Yayin da saurin walda ya ƙaru, saurin extrusion na bututu yana ƙaruwa.Wannan yana sauƙaƙe extrusion na ruwa na ƙarfe yadudduka da oxides waɗanda aka mai tsanani zuwa narke zuwa babban ingancin weld.Hakanan, haɓaka saurin walda zai iya rage lokacin dumama saman tsagi, ta yadda za a iya rage ɗan gajeren da'irar mai tare da rage yankin da zafi ya shafa.

Akasin haka, ba kawai yankin da zafin ya shafa yana da faɗi ba, har ma da bakin ciki na bakin ƙarfe na babban fili na ruwa da aka kafa a saman tsagi ya zama mai kauri, kuma ana haifar da manyan burrs, wanda ke lalata ingancin walda.Koyaya, a wani takamaiman ƙarfin fitarwa, ba za a iya ƙara saurin walda mai sanyi ba tare da iyakancewa ba.In ba haka ba, dumama a bangarorin biyu na billet ɗin ba zai kai ga zafin walda ba, ta yadda za a sami lahani ko babu walƙiya kwata-kwata.

Don bakin karfe, ɗan gajeren haɗin haɗin gwiwa na ripple coefficient na mai yana rinjayar samuwar welds.Capacitance tacewa yana rage ripple zuwa ƙasa da 1%.Lokacin walda bakin karfe, mitar yawanci 200 welds tare da mai kyau tauri da babban mitar zafi shafi yankin..Yawancin lokaci, bangon ciki da na waje na bututun welded ana fesa baya daga yankin walda.Matsakaici, ci gaba da kumfa suna da kyau a ba da shawarar cewa ƙarfin walda ya isa kuma yanayin injin ɗin bai dace ba kuma kumfa duhu yanayin walda ba daidai ba ne kuma ingancin walda ba shi da kyau.