When testing a bearing for excessive heat, the Tempilstik mark should be what length?

When testing a bearing for excessive heat, the Tempilstik mark should be what length?

• A. 3 Inches
• B. 2 Inches
• C. 4 Inches
• D. 1 Inch

Answer: (A)

Tempilstik shows heat by leaving a colored mark on the bearing surface, and the length of that mark is the visual cue for temperature. The idea is that the longer the mark, the hotter the bearing got. For identifying excessive heat, the standard threshold is a three-inch mark—if the mark reaches about three inches, the bearing temperature is above the allowable limit and needs attention. Shorter marks indicate temperatures within tolerance, while marks longer than three inches would imply even higher temperatures. So the three-inch length is the established indicator of overheating.

Tempilstik shows heat by leaving a colored mark on the bearing surface, and the length of that mark is the visual cue for temperature. The idea is that the longer the mark, the hotter the bearing got. For identifying excessive heat, the standard threshold is a three-inch mark—if the mark reaches about three inches, the bearing temperature is above the allowable limit and needs attention. Shorter marks indicate temperatures within tolerance, while marks longer than three inches would imply even higher temperatures. So the three-inch length is the established indicator of overheating.