Question

Sine bar is specified by:

• A. Its total length
• B. The size of rollers
• C. The weight of the sine bar
• D. The center distance between two rollers

Hint:

Sine bars are specified by the center distance between the rollers, as this defines the angle measurement accuracy.

Answer 1

The Correct Option is D

Step 1: Sine Bar Specifications A sine bar is a precision tool for angle measurement in machining, featuring a bar with rollers at each end. Its primary specification is the center-to-center distance between these rollers.Step 2: Conclusion The defining characteristic of a sine bar is the distance between the centers of its rollers (option 4). Final Answer: \[ \boxed{\text{The center distance between two rollers}}\]