What is the recommended minimum chain wrap in a roller chain drive?
The recommended minimum wrap angle of the smallest sprocket in the drive is 120. The wrap angle can be reduced to 90, if good chain tension adjustment is maintained. If chain tension is not closely maintained with less than 120 wrap, the chain can jump teeth, resulting in damage to the chain and/or the sprocket. Note: For a sprocket ratio of 3:1 or less there will always be 120or more wrap on the small sprocket, regardless of the center distance.
The recommended minimum wrap angle of the smallest sprocket in the drive is 120°. The wrap angle can be reduced to 90°, if good chain tension adjustment is maintained. If chain tension is not closely maintained with less than 120° wrap, the chain can jump teeth, resulting in damage to the chain and/or the sprocket. Note: For a sprocket ratio of 3:1 or less there will always be 120°or more wrap on the small sprocket, regardless of the center distance.
