Working on my vehicle the other night, I broke a tool from applying too much torque. I should have been using my torque wrench - I know this. Torque values are important. Using the correct torque values when installing set screws does two things: first, it guarentees that you have applied enough torque to keep the set screw from slipping, which could be a safety issue, and second, it keeps damage from occuring to the set screw, the sprocket, and the shaft. Refer to the chart below to find the correct set screw torque for your application.