A V-pulley relies on friction; if the load is too high, the belt will slip. A Timing Pulley has teeth that lock into the belt. This makes it a mechanical necessity for any machine that requires "indexing" or "positional accuracy," as the belt cannot slip even under high torque.

Because timing belts are flat, they have a natural tendency to drift sideways (track) due to slight shaft misalignments. Flanges act as side-walls to keep the belt centered on the pulley. Typically, at least one pulley in a two-shaft system should be double-flanged.

Backlash is the tiny amount of "play" between the belt tooth and the pulley groove. In precision robotics or 3D printing, we use GT2 or specialized profiles and "Zero-Backlash" pulleys to ensure that when the motor reverses direction, the movement is instantaneous.

No. Even if they look similar, the tooth shape and the distance between teeth (pitch) are different. Using the wrong belt-pulley combination will cause the belt to "climb" out of the grooves, leading to rapid belt wear and system failure.

For most applications, Hard-Anodized Aluminum is excellent because it is lightweight (reducing motor load) and resistant to corrosion. However, for ultra-high-torque or abrasive environments (like rock crushing or heavy milling), Steel or Cast Iron is the preferred choice.