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词汇 Sine bar
分类 英语词汇 英语翻译词典
释义

Sine bar

英语百科

Sine bar

Sine bar set up with one end raised on a stack of gauge blocks
10-inch and 100-millimetre sine bars.  In the U.S., 5-inch sine bars are the most common size.

A sine bar consists of a hardened, precision ground body with two precision ground cylinders fixed at the ends. The distance between the centers of the cylinders is precisely controlled, and the top of the bar is parallel to a line through the centers of the two rollers. The dimension between the two rollers is chosen to be a whole number (for ease of later calculations) and forms the hypotenuse of a triangle when in use.

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