The mixing knife will wear out over time if the Thermomix® TM6 is regularly used for chopping hard food. The table below shows the recommended intervals for replacing the mixing knife.

USE EXAMPLE OF USE REPLACEMENT OF MIXING KNIFE AFTER
HEAVY Crush ice, grind grains daily 1⁄2 year
MODERATE Crush ice, grind grains weekly 2 years
LOW Hardly ever crush ice or grind grains 4 years