过去我厂在制造齿轮、齿条及螺丝等测定齿距(P),都是单纯以齿距游标尺检查;经验证明,由此测定出来的齿距,大部份是不精确的。於本厂生产八尺车床齿条加工时,所用的样板,仍以此种量具衡量,制作的加工品,依此样板进行制造的,其结果用齿距游标尺检查齿距,当测定一个齿时,其结果是 In the past, the gear pitch, rack and screw pitch etc. (P) of our factory were simply inspected with pitch rulers. The experience proved that most of the tooth pitches were inaccurate. In the factory production eight-foot lathe rack processing, the use of the model is still measured with this measuring tool, the production of processed products, manufactured according to the template, the results of pitch pitch with a ruler to check the pitch, when determining a tooth When the result is