Cov khoom siv ntawm qhov chaw xyaum tuaj yeem muab faib ua cov hlau nrawm, cemented carbide, ceramics thiab polycrystalline pob zeb diamond.Ntawm lawv, high-speed steel yog cov khoom siv uas siv nrog cov nqi siab;cemented carbide muaj qhov hnav tsis kam thiab hardness, thiab tsim nyog rau kev ua cov ntaub ntawv nrog cov hardness siab;ceramic center xyaum muaj qhov kub thiab txias tsis kam, tab sis kev ua haujlwm tsawg;polycrystalline pob zeb diamond center laum muaj ultra-siab hardness thiab hnav tsis kam, thiab yog tsim rau kev ua cov ntaub ntawv siab hardness.Thaum xaiv cov khoom siv hauv nruab nrab, nws yuav tsum raug xaiv raws li qhov nyuaj ntawm cov khoom siv ua haujlwm thiab kev ua haujlwm.Feem ntau hais lus, rau cov khoom siv hlau nyuaj, koj tuaj yeem xaiv cov ntaub ntawv nyuaj, xws li cemented carbide, polycrystalline pob zeb diamond, thiab lwm yam;rau cov ntaub ntawv softer, koj tuaj yeem xaiv high-speed steel lossis ceramics.Tsis tas li ntawd, nws tseem yuav tsum tau them sai sai rau cov yam ntxwv xws li qhov loj me thiab qhov zoo ntawm qhov chaw xyaum ua haujlwm kom ntseeg tau tias kev ua haujlwm zoo thiab kev ua haujlwm raug.Thaum siv lub hauv paus xyaum, yuav tsum tau them nyiaj mloog mus rau kev ua lubrication thiab txias txias kom tsis txhob muaj cov cuab yeej hnav thiab txo qhov zoo ntawm qhov chaw vim yog kev ua haujlwm ntau dhau.Nyob rau tib lub sijhawm, peb kuj yuav tsum tau xyuam xim rau kev nyab xeeb thaum ua haujlwm kom tsis txhob muaj qhov ua haujlwm tsis ruaj khov lossis ua haujlwm raug mob los ntawm kev ua haujlwm tsawg.