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Use and
Care of the Dial Indicator (Continued) Measuring inner bearing ring face runout Remove the outer grease retainer/bearing cap. Mount the magnetic tool holder on the end bell of the motor. Mount the instrument on the tool post holder. Bring the sensor button into contact with the inner bearing ring. Raise and lower the sensor button with the tool post holder thumbscrew to determine full travel of the indicator pointer. Leave the pointer at midtravel and zero the bezel. Rotate the shaft with the sensor button against the inner ring of bearing. Maximum runout is 0.0003 inch for noise- tested bearings, regardless of size, and 0.001 inch per inch for standard bearings. Record the measurement on the motor data sheet (mechanical).
Record the measurement on the motor data sheet (mechanical). |
Click on image to enlarge. Measuring Bearing Inner Rings |
| Review Questions If you can correctly answer the questions below, you have learned the key points in this lesson. Choose the correct answer for each question, then look at your score below the questions. Review the lesson if you miss any questions. |
Check the stiffness of the indicator mounting as it is rotated. Gravity
loading may cause it to shift as it is rotated to bottom of travel. Also, ensure that the
dial indicator does not come into contact with the deck, frame, etc., during rotation.
