Shaft Run Out Check

Yesterday i met my client, Mr Great Bedollah. He ask me to do the shaft run out check. I am very grateful because now i know how to do it. Thanks to Mr. Japri and Bedollah that taught me this lesson. I have learn this during metrological lab but i do not realize that it is really important. So let us learn it one more time.

1. First of all we have to check the dial indicator that we have can be trusted or not. The normal practise is by pressing the tip of dial indicator for a couple of times. If the dial indicator stop at the same point, we can conclude that it is reliable for the calibrating process.
2. Next is to make sure that the magnetic stand is working properly and the magnetic strength is enough to withstand the weight of dial indicator equipments. Take account the length of the stand because, longer shaft require longer stand for easier calibration process.
3. Make sure that the surface of the shaft that we want to check is free from dust and any other matters that will effects the calibration result.
4. Setup the dial indicator to the appointed location.Make sure that the tip touch the shaft surface. Do some test run by rotating the shaft.
   
5. Ready with your pen, and result paper and rotate the shaft. Make sure that your eyes is 90 degress with the dial indicator.
6. Record all the result data. The most important is to record data for highest point and lowest point.
7. After that, analyze that data, identify snd investigates what is the reason of result obtain. Whether there are dust, corrosion or other defect such as holes.
8. Then, document all your findings and send report to your client.

Remember to check the shaft at axial point also. Apply force to the shaft in axial direction. Record how long the shaft move when axial force is applied. All equipment has its own tolerance. If the data gathered is within tolerances, so the percentages of failure during operation can be minimize. That's all. Please comment if you want to add anything.