CAM CLUTCH BASICS
4. Basic Cam Clutch Construction Figure 4 provides a sectional view of the components which reside inside of a Tsubaki MZ Series Cam Clutch. This illustration is typical of Tsubaki Cam Clutch construction. Each of the components identified are critical for function and performance of the assembly.
Bearing Cam Spring
Inner race Outer race
Figure 4: Cam Clutch major component parts
Part
Appearance
Function
A number of cams set regularly in between the inner and outer races function as props or sliders depending on the relative rotating directions of the inner and outer races. This action causes engagement (clutching) and disengagement (overrunning) of the clutch inner and outer races. The cams are the vital component of a Cam Clutch, and they are available in various models and types to suit a variety of applications.
Cam
Inner Race
The inner and outer surface of the races are hardened and precision ground to enable the ability to withstand high compression stress during cam engagement.
Outer Race
Compressed springs are set at both ends of the cams to ensure that all of the cams contact the inner and outer races at all times. Thus, the cams are always ready for immediate engagement. This is extremely important so as to ensure that the load is spread evenly across all cams when they engage with the inner and outer races.
Spring
The bearings maintain concentricity of the inner and outer races and bear the radial load for the engagement of the cams and the inner and outer races. Maintaining concentricity is particularly important to ensure that the load is spread equally and simultaneously over the cams at the time of engagement.
Bearing
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