friction drive belt / pulley
Plain metal belts are created by welding together two ends of a metal tape to form an endless belt.High-energy beam-welding techniques, pioneered in the space program, form a high-integrity butt weld that is extremely strong and smooth.Friction drive pulleys are generally flat-faced with no timing element. Crowning pulley faces is not generally recommended. A full radius crown is less stressful on the belt, but is more difficult to machine and, therefore, more costly. The trapezoidal crown is more cost effective, but it should be avoided in applications having high belt tensile loads due to stress risers at the crown’s transition points between angled flats. Blending these points can be helpful but does not eliminate the high-stress risers.
