Which term describes the belt length measured at the tension member location?

Which term describes the belt length measured at the tension member location?

• A. Pitch Circle
• B. Pitch Line
• C. Center Distance
• D. Arc Length

Answer: (A)

The length of a belt is defined along the belt’s centerline where the tensile cords run, which is called the pitch line. Measuring along this line gives the actual belt length as it wraps around pulleys, since that is the path the belt follows and the point that carries the tension. The pitch circle terminology, on the other hand, belongs to pulleys/gears and refers to the imaginary circle that relates to how teeth or belt pitches engage on the pulley. It’s used to size pulleys and determine spacing, not to specify the belt’s length along its loop. Center distance is simply the space between pulley centers, and arc length would pertain to the portion of the belt in contact with a pulley, not the total belt length. So, the belt length measured at the tension member location is described by the pitch line.

The length of a belt is defined along the belt’s centerline where the tensile cords run, which is called the pitch line. Measuring along this line gives the actual belt length as it wraps around pulleys, since that is the path the belt follows and the point that carries the tension.

The pitch circle terminology, on the other hand, belongs to pulleys/gears and refers to the imaginary circle that relates to how teeth or belt pitches engage on the pulley. It’s used to size pulleys and determine spacing, not to specify the belt’s length along its loop. Center distance is simply the space between pulley centers, and arc length would pertain to the portion of the belt in contact with a pulley, not the total belt length.

So, the belt length measured at the tension member location is described by the pitch line.