双向推力角接触球轴承
 
　　FYB—双向推力角接触球轴承是由一整体外圈、一组剖分式内圈、钢球和保持架组 件及密封组成的轴承单元，其结构紧凑体积小，可双向受力，旋转精度高，并可在 承受很高径向负荷同时承受一定的轴向负荷。产品结构形式多样、旋转精度高、适 应性广、易于安装。主要用于机床上，特别是用于组合机床或加工中心的螺杆传动。

△结构形式
　　该类轴承角接触球与双沟道外圈、剖分内圈组合为一体，可承受双向载荷。
　　密封可根据使用具体情况选用唇密封或间隙密封。

△产品精度
　　尺寸公差和几何精度按GB/T307 P4级。
　　配套钢球精度等级3级（国标GB/T308）。

△材料
　　滚针材料为GCr15轴承钢，淬硬HRC60—65。
　　内外圈材料为GCr15轴承钢，淬硬HRC61—65。
　　保持架材料增强尼龙。

△特殊说明
　　安装时需施加推荐的拧紧力矩才能保证的技术特性。
　　装配时必须通过轴承套圈传递。
　　受塑料保持架、润滑脂和密封材料的限制，连续工作不得超过运转温度+120°C。

△标准
Double-direction Angular Contact Thrust Ball Bearing

FYB---double-direction angular contact thrust ball bearing is a bearing unit composed of an integral outer ring, a group of sectile inner rings, steel balls, cage assemblies and sealing. It features compact structure, small size and high rotating accuracy, enduring force in two directions and bearing certain axial load while holding very high radial load, and multiple structure styles, broad adaptability and easy installation. It is widely used in combination lathe or the spiral-rod drive in machining center.

Types of Designs:
Angular contact ball, double-channel outer rings and dissectible inner rings combine into one which can bear double-direction load. Lip seal or gap seal can be adopted according to the circumstances.

Product Precision Accuracy:
Dimensional tolerance and geometrical accuracy is based on GB/T307P4.
Matched steel ball precision grade is Ⅲ (ISO GB/T308).

Materials:
Material for needle roller is GCr15 bearing steel, quench-hardening HRC60---65.
Material for inner and outer races is GCr15 bearing steel, quench-hardening HRC61---65.
Material for cages is reinforced nylon.

Special Directions:
Recommended tightening moment should be exerted during mounting so as to ensure its technical property.
Transmission must be carried out through bearing races when fitting.
Limited by plastic cages, grease and sealing material, operating temperature is not allowed to surpass +1200C during continuous work.