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滾珠軸承,主要包含四個基本元件:滾珠、內環、外環與保持器,如圖所示。一般工業用的滾珠軸承滿足AISI 52100的標準[來源請求],滾珠與環通常是以高鉻鋼製成,洛氏硬度約在61至65之間。而保持器的硬度相較於滾珠與環低,其材料有金屬(如:中碳鋼、鋁合金)或非金屬(如:鐵弗龍、PTEF、高分子材料)。由於滾動軸承(如右圖)比頸軸承的轉動摩擦阻力小,因此相同的轉速下,摩擦產生的溫度會比較低。
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