|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 (200mm wide), a radius crown is used. For wider conveyor belts, typically, a trapezoidal crown is 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 Height h|
|Pulley Diameter D|
The min. pulley face width Wp = (belt width Wb x 1.1) + 15 mm.
The max. belt width Wb = (pulley face width Wp - 15 mm) / 1.10
|Pulley Diameter D||Crown Height h|
|25 to 70||0.3|
|70 to 100||0.43|
|100 to 150||0.56|
|150 to 200||0..66|
|200 to 280||0.86|
|280 to 350||1.06|
|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 200mm, use a radius crown and refer to the flat belt pulley specifications above.|
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