Kev quenching hardness ntawm nplhaib nplhaib raceway muaj tus cwj pwm zoo rau nws lub peev xwm zoo li qub. Yog tias qhov peev xwm ntawm lub peev xwm muaj peev xwm yog 1 hauv HRC 55, qhov nyuaj tshaj plaws hauv kev sib raug zoo ntawm txoj kev sib tw ntawm txoj kev sib tw thiab lub peev xwm uas muaj peev xwm npaum li cas yog HRC 55. Feem ntau, qhov tseeb qhov tsis txaus siab yog li ntawm HRC57, li ntawd qhov tseeb ntawm feem ntau slewing bearings siab tshaj qhov theoretical tus nqi xam los ntawm HRC55. Nws kuj tseem yuav pom tau tias thaum lub zog qis tshaj HRC53, txawm tias nws muaj kev nyab xeeb ntawm 1.2, nws tsis zoo siv, tshwj xeeb tshaj yog thaum qhov nyuaj yog HRC50 xwb, qhov teeb meem ntawm kev nyab xeeb ntawm 1.7 lub sij hawm kuj tseem ceeb, uas yog qhov txaus ntshai heev. Kev kho tsis tshua muaj peev xwm ua rau kom lub nplhaib tua tsis tau yooj yim, pib ntawm pitting ntawm qhov chaw ntawm lub raceway mus txog thaum tsaus ntuj.
Los ntawm qhov kev tshawb fawb saum toj no, peb tuaj yeem paub tau tias yog tias qhov nyuaj ntawm kev tsis txaus siab ntawm txoj kev tua kabmob tsis txaus, qhov kev sib ntau ntawm txoj kev yuav raug puas ntsoog. Feem ntau, kev nyuaj ntawm txoj kev sib tw ntawm kev sib tua tau muaj qee yam ntawm seem uas seem. Yog tias nws zoo tshaj qhov seem no, peb yuav ua rau txoj kev raug kev puas ntsoog tsis zoo. Cuam tshuam qhov kev pab cuam ntawm lub nplhaib sib tua. Yog li no, qhov nyuaj ntawm txoj kev nyuab siab yog qhov tseem ceeb tshaj uas cuam tshuam rau txoj kev ua haujlwm ntawm lub nplhaib
