볼 베어링이나 롤러 베어링의 표면 면에 위치한 금속 또는 플라스틱 실드로, 주로 베어링 내부 구조로 이물질이 들어가는 것을 방지하도록 설계되었습니다.
qq-n-290 fed spec single treatment response overall surface treatment document and classification, steel comp 4130 overall material, od 10.6800 in. nom,id 9.5500 in. nom,width 0.0295 in. nom,dia of undercut 9.6900 in. nom,width of undercut 0.0200 in. nom;silver coating 1.7.1 of mil-std-171,0.0004-0.0008 thk,bake for 3hrs at 191c or 375f to relieve hydrogen embrittlement special features, gpu/5a end item identification, nickel overall surface treatment