Which tool is typically used to locate the center of a cylindrical workpiece by marking reference points around its circumference?

Which tool is typically used to locate the center of a cylindrical workpiece by marking reference points around its circumference?

• A. Dial indicator
• B. Combination set
• C. Micrometer caliper
• D. Machinist scale

Answer: (B)

Locating the center on a round workpiece by marking points around the edge is a layout task that relies on marking and transferring geometry. A combination set fits this need because it provides tools for drawing and laying out lines and angles, allowing you to scribe multiple reference points around the circumference and transfer measurements around the circle. With those points, you can establish the center through the standard circle-layout techniques. The other tools are geared more toward measuring or checking rather than marking circular references: a dial indicator measures runout, a micrometer caliper measures diameter with high precision, and a machinist scale (ruler) covers linear measurements but isn’t ideal for circular layouts.

Locating the center on a round workpiece by marking points around the edge is a layout task that relies on marking and transferring geometry. A combination set fits this need because it provides tools for drawing and laying out lines and angles, allowing you to scribe multiple reference points around the circumference and transfer measurements around the circle. With those points, you can establish the center through the standard circle-layout techniques. The other tools are geared more toward measuring or checking rather than marking circular references: a dial indicator measures runout, a micrometer caliper measures diameter with high precision, and a machinist scale (ruler) covers linear measurements but isn’t ideal for circular layouts.