紧定螺钉又称为支头螺丝、定位螺丝。是一种专供固定机件相对位置用的螺钉。类型：方头凸缘端紧定螺栓、gb/t821-1988方头倒角端紧定螺钉、gb/t85-1988方头长圆柱端紧定螺钉、内方头紧定螺钉等。
格： 中文名称：紧定螺钉 英文名称：set screw 定义：用来固定两零件位置的螺钉。 紧定螺钉又称为支头螺丝、定位螺丝。 用途：专供固定机件相对位置用的一种螺钉。使用时，把紧定螺钉旋入待固定的机件的螺孔中，以
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内方头紧定螺钉 square-socket set-screw
开槽平端紧定螺钉 Slotted Set Screws with Flat Point
双头紧定螺钉扳手 end set screw wrench ; double-end set screw wrench ; double end set screw wrench
开槽长圆柱端紧定螺钉 Slotted set screws with dog point
六角凹头紧定螺钉 Hexagon socket set screws
开槽凹端紧定螺钉 Slotted Set With Cup Point
内六角圆柱端紧定螺钉 Hexagon socket set screws with dog point ; hexagon socket set screws wi
开槽锥端紧定螺钉 Slotted set screws with cone point
可通过两侧端盖上的调整螺盖来进行，调整前应松开紧定螺钉，调整后拧紧。
It can be adjusted by the adjusting screw caps located on the head covers of both sides. Loose the locking screws beforehand, then re-tighten them after.
所述的吊耳套1上设置有紧定螺钉，紧定螺钉的轴线垂直于吊耳套1的轴线。
The lifting lug 1 is provided with a holding screw the axis of which is perpendicular to the axis of the lifting lug 1.
轴承与轴的紧固方法是：对于带紧定螺钉的外球面球轴承，用内六角螺钉扳手将轴承宽内圈上的两紧定螺钉锁紧到位。
The method which the bearing is tightened to the shaft is : for set screws locking type bearing, tightening the two set screws located at two places on one side of the wide inner ring to the shaft.
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