|Crowning one or several pulleys in a belt system is the most common way of tracking a belt. For flat power transmission belts and narrow conveyor belts (up_to_8_in.), a radius crown is used. For wider conveyor belts, a trapezoidal crown is typically applied. Note: Never utilize an apex crown!|
A radius crown represents a great way to track a belt. Dimensionally, it does not take a big crown height in order for the belt to track properly, and exceeding the seemingly small amounts below will actually do more harm than good!
|Standard Radius Crown Heights h|
|Pulley Diameter D|
The min. pulley face width Wp = (belt width Wb x 1.1) + 0.5 in.
The max. belt width Wb = (pulley face width Wp - 0.5 in) / 1.10
|Pulley Diameter D||Crown Height h|
|1 to 2.75||0.012|
|2.75 to 4||0.017|
|4 to 6||0.022|
|6 to 8||0.026|
|8 to 11||0.034|
|11 to 14||0.042|
|Note:||The cylindrical part of the pulley Wc is half of the belt width Wb.|
|Also, it is recommended for the pulley width Wp to be approximately 10 to 20% wider than the belt width Wb for the pulley crown to function properly. For pulley widths less than 8 in., use a radius crown and refer to the flat belt pulley specifications above.|
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