What is the recommended length of a tempilstik mark for testing bearings?

The recommended length of a tempilstik mark for testing bearings is 3 inches. This length provides an adequate surface area to ensure an accurate reading when testing for temperature. The 3-inch mark strikes a balance between visibility and precision, making it easier to confirm that the tempilstik is properly applied and to assess the temperature effectively.

Using a mark that is too short may lead to insufficient data, while a mark that is too long could result in overlaps or inaccuracies in reading the temperature. The choice of 3 inches standardizes the procedure, allowing for consistency in testing across various situations and ensuring compliance with safety protocols.