The  VSI wear parts are contained both within and on the outer surfaces of the rotor. Different wear parts have different  material technology to resist either impact or abrasive wear . Selection of the correct wear parts for the application required is fundamental to ensure the desired performance.

The VSI wear parts that are worn the most inside the rotor are the Distributor plate, Rotor Tips, Lower wear plates and Feed tube. This happens because these parts have direct contact with the feed material at all times as it passes through the rotor. The distributor plate is worn in two ways,firstly by impact as the material falls vertically into the rotor and then abrasion as is sent horizontally out of the rotor.  The Rotor tips are the last thing to touch the feed material as it exits the rotor. They have a Tungsten insert that improves wear erence point for the other rotor wear parts. The lower wear plates generally wear more than the upper wear plates due to under utilisation of the rotors maximum throughput and the use of an incorrectly shaped trail plate. The feed tube is worn as it guides/funnels the feed  material into the rotor opening as it comes down from the hopper.