Cam speeds are often limited by utilizing the configuration as shown in figure 1. Factors contributing to less than adequate cam performance are oversized track (to allow clearance for the cam follower), reversal of cam follower rotation (caused by improper curve design), etc. The final results are noise, premature wear and limited speeds.
Enhancement can be achieved with the cam configured as shown in figure 2, in most cases within the same physical space. This design with 2 followers makes it possible to run at higher speeds, quieter, and extends the life of both the cam and followers. Another plus is that by utilizing the outer cam surface as the primary cam the pressure angle is reduced. All of these factors contribute to the possible higher speeds, less noise, and more accurate translated motion. A hardened and ground cam should be utilized to ensure accuracy and extended life.
More Speed
More Precise
Less Noise
Less Wear

In this case, a company that designed the cam shown (right) needed major weight reductions. As the scale depicts, the cam required considerable mass for its internal diameter size. Upon review of the machinery in which the cam was to operate MALLORY sales and manufacturing engineers submitted the cam shown (below).

The potential customer, under heavy pressure to have this new machine completed, granted approval of the concept and set out to redesign and manufacture the new follower system. Mallory machined the cam blank, installed six lightening holes (not shown), wire edm cut a keyway, milled the cam surfaces, sent the cam to heat treat and upon return, honed the internal diameter to final size. The customer received the new cam within one week, just as the new follower system had been completed.

The results: 50 percent reduction in weight, and a cam design that allowed the mechanism to be turned by hand. Previously the cam follower would bind in the cam track. The conjugate barrel cam and double follower system will allow this customer's machine to run faster and longer between service intervals.