River City Select

Cam Angle Measurements

In a former geometry analysis, the camming angle of the Black Diamond #3 Camalot was determined to be 14.9653 degrees. To verify this measurement, the cam angle was measured directly by placing the cam in a vice with parallel plates lined with white paper. The cam was inked so that when it was placed in the vice, it would mark the contact point of the cam with the walls of the vice. The distance of the two plates were set at respective widths and the cam angle was measured at each width. The measurements yielded an intermediate outer lobe camming angle of 14.648 degrees and an intermediate inner lobe camming angle of 13.66318 degrees.

The measurements taken regrettably had a big amount of scatter. This may have been due to the fact that the surface of the cam lobe is notched. Whereas a point in the area where the notch is located would commonly be the contact surface, the contact point is actually a point to the left or right of the notch as the notch itself is not capable to make contact with the surface. This leads to a few degrees of error; however, when these values are averaged, this error seems to be significantly reduced.

When measured directly, the outer and inner cam lobes were found to have cam angles of 14.648 and 13.663 degrees respectively. These values are reasonably close to the value of 14.9653 degrees determined from geometric analysis of the cam lobe shape.

If you’re interested, you will have to proceed learning more regarding the strength analysis and cam angle analysis of SLCDs at Matt’s exploration page.

Assembly Spring Loaded Length Degrees Pic

Assembly Spring Loaded Length Degrees Picture

Assembly Spring Loaded Length Degrees Pic

Assembly Spring Loaded Length Degrees Photo