推力軸承及其零件

　　FYB—推力軸承是由一個推力保持架與滾針或圓柱滾子，或推力球加推力墊圈組成的軸承單元，并可組件單獨使用，結構緊湊多樣，能承受單向軸向力，具有高承載能力和高剛度。軸承廣泛用于汽車、機床、冶金機械、紡織機械、電動機、傳動軸、齒輪箱等定位和支承處。

△結構形式
　　軸承滾動體有推力球、推力圓柱滾子、滾針等多種形式。
　　保持架有鋼的和有色金屬材質。
　　保持架有車制和沖壓結構。

△產品精度
　　尺寸公差和幾何精度按GB/T307。
　　配套圓柱滾子精度等級Ⅲ級（國標GB/T4661）。
　　滾針直徑相互差在2μm，精度等級為G2級（國標GB309）。
　　配套鋼球精度等級20級（國標GB/T308）。

△材料
　　滾動體材料為GCr15軸承鋼，淬硬HRC60—65。
　　推力墊圈材料為GCr15軸承鋼，淬硬HRC61—65。
　　沖壓零件材料為優質低碳鋼。
　　保持架為低碳鋼或有色金屬。

△特殊說明
　　裝配容易但需充分考慮裝配中的軸向預載荷。

△標準
　　GB/T273.2—1998滾動軸承推力軸承外形尺寸總方案（GB-12）
　　GB/T301—1995滾動軸承推力球軸承外形尺寸（GB-10）
　　GB/T307.4—2002滾動軸承推力軸承公差（GB-14）
　　GB/T4663—1994滾動軸承推力圓柱滾子軸承外形尺寸（GB-9）
　　JB/T7915—1995滾動軸承推力滾針和保持架組件、推力墊圈（GB-2）
　　JB/T8211—1996滾動軸承推力圓柱滾子和保持架組件及推力墊圈（JB-7）

Thrust Bearing and Its Components

FYB---thrust bearing and its components is a unit composed of thrust cage and needle roller or cylindrical roller, or thrust ball with thrust washer. It can also consist work-pieces used separately. Featuring compact structures, capability of bearing single-direction axial force, high loading ability and high rigidity. It is widely used in lathe, metallurgical and textile machinery; motor, driving shaft, gearbox and other location & supporting location.

Types of Designs:
For bearing rolling body, various structures of thrust balls, needle rollers and cylindrical rollers are available.

For cages, materials of steel and non-ferrous metal can be chosen.
There are different structures of cages, such as machined & punched.

Product Precision Accuracy:
Dimensional tolerance and geometrical accuracy is based on GB/T307.
Matched cylindrical roller precision grade is Ⅲ (ISO GB/T4661).
Mutual difference of needle roller diameter is 2μm, and the precision grade is G2 (ISO GB309).
Matched steel ball accuracy is grade 20 (ISO GB/T308).

Materials:
Material for rolling body is GCr15 bearing steel, quench-hardening HRC60---65.
Material for thrust washer is GCr15 bearing steel, quench-hardening HRC61---65.
Material for punched parts is quality low-carbon steel.
Material for cages is low-carbon steel or non-ferrous metal.

Special Directions:
Easy to mount, but axial preloading during installation is to be fully considered.