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如图所示,为日本NSK公司开发的U系列(精密超大导程)滚珠丝杠,钢珠与丝杠与螺母的槽中循环滚动,螺母两端设有循环零件(端盖),与螺母构成循环通道。U系列丝杠因导程特别大(为标准丝杠的4～8
As shown in the figure, the U series (precision super large lead) ball screw developed by NSK Company of Japan circulates and rolls in the grooves of ball and screw and nut. There are circulating parts (end caps) at both ends of the nut, Circulation channel. U Series lead screw due to special large (for the standard screw 4 ~ 8