What factor does NOT influence the power transmission capability of a belt?

The factor that does not influence the power transmission capability of a belt is related to the physical attributes and materials involved in the belt and its application. Pulley color has no direct impact on how effectively power is transmitted through the belt system.

Power transmission capability is largely affected by the area of contact between the belt and the pulleys, as greater contact area can increase friction and improve the ability of the belt to transmit power. The type of material used for the belt is crucial because different materials have varying coefficients of friction, elasticity, and durability, all of which impact the belt's performance. Additionally, the diameter of the pulleys plays a significant role; smaller pulleys tend to require more tension and can lead to increased wear, while larger pulleys help with smoother operation at higher speeds.

Since color does not change the mechanical properties or friction characteristics of the belt or pulleys, it does not influence power transmission capability.