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千分尺即分厘卡,它是用来度量工件的长度及外径的比较精密的量具。 图1是千分尺的构造:由下列零件装配而成:①尺架;②测砧;③螺丝测杆;④螺纹轴套;⑤紧定螺帽; ⑥刻度套管;⑦摩擦帽;⑧销子;⑨弹簧;⑩止动把。其中螺丝测杆③是千分尺中最关键零件之一。因为它上面有着螺 距为0.
Micrometer points PCT points, it is used to measure the length of the workpiece and the outer diameter of the relatively precise measuring tools. Figure 1 is a micrometer structure: assembled by the following parts: ① feet; ② anvil; ③ screw rod; ④ threaded sleeve; ⑤ tight nut; ⑥ scale casing; ⑦ friction cap; ⑧ pin ; ⑨ spring; ⑩ stop the handle. One screw rod ③ is one of the most critical parts of the micrometer. Because it has a pitch of 0 on it.