Cam Terminology

B Backlash The play that exists between the contacting surfaces of mechanical elements. Backlash is the cause of vibration. Backlash in roller gear and parallel cams can be eliminated by pre-loading.
Barrel Cam A cylinder-shaped solid cam used to produce intermittent indexing and oscillating motions.
Bell Cam, End Cam A cam that uses the end of its cylinder.
Bottom Dead Point See Top Dead Point.