A loose-fitting belt on a belt-driven device will cause:

A loose-fitting belt on a belt-driven device will cause:

• A. Bearing wear.
• B. Overheating motor.
• C. Pulley wobble.
• D. Worn pulley grooves.

Answer: (D)

When a belt in a belt-driven system is loose, it tends to slip as the pulley rotates. That slipping keeps rubbing against the sides of the pulley grooves, gradually wearing them down and changing the groove shape. Over time, the grooves become worn, which can worsen slipping and reduce the belt’s grip, accelerating wear on both parts. A loose belt isn’t mainly responsible for bearing wear or pulley wobble—the former is more about misalignment or excessive load, and the latter comes from mounting or alignment issues. Overheating the motor isn’t the primary outcome here either; it’s usually linked to other factors like overload or poor drive efficiency.

When a belt in a belt-driven system is loose, it tends to slip as the pulley rotates. That slipping keeps rubbing against the sides of the pulley grooves, gradually wearing them down and changing the groove shape. Over time, the grooves become worn, which can worsen slipping and reduce the belt’s grip, accelerating wear on both parts. A loose belt isn’t mainly responsible for bearing wear or pulley wobble—the former is more about misalignment or excessive load, and the latter comes from mounting or alignment issues. Overheating the motor isn’t the primary outcome here either; it’s usually linked to other factors like overload or poor drive efficiency.