Drive Systems

• Transfer power from place to place

• Can change size, direction and speed of applied force

• Belt, chain, gear, cam and variable speed systems

• Synchronous or non-synchronous

Belt Drives

Things to remember:

• The types of belts

• What tensile members do

• Tight side, slack side

• Creep vs. slip

Figure 15-2 from Industrial Mechanics

Belt Length Formula:L = 2 x C + 1.57(D + d) + (D – d) 2 / 4 x C

Let’s work out the belt length for two pulleys 30” apart. One has a 5” diameter and the other has a 10” diameter.

• Belt creep

• Slip

• Glazing