OVERRUNNING: DUAL DRIVE AND TWO SPEED DRIVE
Medium and Low-Speed Overrunning and Medium and Low-Speed Engagement: (Overrunning speed = 700 RPM and up) (Engaging speed = up to 700 RPM)
In this application, one driven unit is driven at two speeds by a medium and a low-speed drive unit, both at speeds lower than 700 r/min. Two Cam Clutches enable automatic switching between the drive units.
Figure 28 shows an example of Cam Clutches being used with the pasting rolls of a corrugating machine for making cardboard. The pasting rolls are driven continuously by the main motor. During this time, Cam Clutch A engages and Cam Clutch B overruns. When the main motor must be stopped temporarily to fix a problem, it is necessary to keep rotating the pasting rolls in order to prevent paste on the roll surface from drying. To do this, the rolls are driven by an auxiliary motor at a low speed sufficient to prevent the paste from drying (Cam Clutch A overruns, while B engages). This system is also used with meat choppers and screw feeds in food processing machinery.
Example of pasting roll drive
Cam Clutch A
Cam Clutch B
Figure 28: Two speed drive – Medium Overrunning and engagement
Typical Series
Advantage
Same dimensions as the #62 type bearing Integrated Cam Clutch and bearing Compact and transmits high torque Excellent wear resistance when overrunning
BB
MGUS
MZ, MZEU
Grease is sealed in, lubrication maintenance is not required
TFS
Outside dimensions are the same as #63 type bearing
Outside dimensions are the same as #62 type bearing Compact designs are possible
TSS
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