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: Understand sine bar specifications. A sine bar is a precision instrument used to measure angles in machining. It consists of a bar with two rollers at each end. The key specification of a sine bar is the center distance between the two rollers. Step 2: Conclusion The sine bar is specified by the center distance between the two rollers (option 4). Final Answer: \[ \boxed{\text{The center distance between two rollers}} \]