<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: Tahoma"><SPAN style="mso-spacerun: yes">&nbsp; </SPAN>FAG</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">四点接触球轴承属于单列角接触球轴承，可以在轴向两个方向随高载荷，在径向方向只能承受低载荷。为了保证低摩擦，特别是在高速下，要求保证有一个最小轴向载荷。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: Tahoma"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: Tahoma"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp; </SPAN><A href="http://www.nsk-nsk.com/"><SPAN style="mso-spacerun: yes">&nbsp;</SPAN>FAG<SPAN lang=EN-US style="FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma"><SPAN lang=EN-US>四点接触球轴承为双半圈，这样可以装入尽量多的钢球。带钢球的外圈组件和半个内圈可以独立安装，轴承调心能力很小</SPAN></SPAN></A></SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: Tahoma"><o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: Tahoma"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">由于钢球数量多，轴肩高以及接触角为</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: Tahoma">35</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">度，四点接触球轴承的轴向承载能力很高。当四点接触球轴承作为推力轴承使用时，其轴承座与轴承外圈之间留有很大配合间隙，以保证其不承受径向力。大型</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: Tahoma">FAG</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">四点接触球轴承外圈有两个定位槽，用于固定外圈（轴承代号后缀</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: Tahoma">N2</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">）。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: Tahoma"><o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: Tahoma"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN>FAG</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">四点接触球轴承的基本类型采用标准组游隙。需要时也可采用较大的游隙组（代号后缀</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: Tahoma">C3</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">）。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #666666; FONT-FAMILY: Tahoma"><o:p></o:p></SPAN></P>