Hem Saw Drive Pullys
Aftermarket HE&M Saw Veri Drive Pulleys
This type of drive package consists of a mechanically operated driver pulley mounted on the motor shaft, a spring-loaded pulley mounted on the driven shaft, and a variable speed belt running between the two pulleys.
- The center-distance between the motor and driven shafts is set at one position, and never changes.
- A 1:1 ratio between the motor and driven shafts occurs when the belt is in the median pitch diameter of both pulleys.
Output speed is reduced by turning the handwheel on the motor pulley, while the drive is running, to mechanically open the pulley face. This allows the belt to drop down to a lower pitch diameter on the driver pulley, while spring pressure in the driven pulley forces the belt to a higher pitch diameter. Speed increase is accomplished in exactly the opposite manner. By mechanically forcing the driver pulley faces together the belt is forced to a higher pitch diameter, and thereby drawn to a smaller pitch diameter on the driven pulley.
Hem® is a trademark of Hem Manufacturing Company, Inc
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