How to check prop shaft for straightness with a Dial Indicator

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Uploaded by on Jan 17, 2009

Tc Marine's marine mechanic, Wayne Coll shows you how to test a mercruiser alpha 1 prop shaft for straightness with a dial indicator

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Autos & Vehicles

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  • A wasted bearing would give you the same results, and thats called a test indicator, the 0-1.0 dial type is called a dial idicater.

  • why would I repair instead of buying new? pls answer

  • @EngEdge Finally someone who knows their GD&T!!! XD

  • Thanks. I am studying DTI but had no clue how they work...now I have an idea.

  • The measurement demonstrated in the this video is actually circular runout with the shaft datum reference being the associated bearings.

    Straightness would be measured by running the dial indicator parallel to the shaft measuring from the two highest contact areas along that surface length intersecting the axis.

  • @fgleich No please dont use a Press that would only make same worse.. on large marine shafts a litte heat is applied followed by cooling with a wet rag. for realignment...

  • @rob78888 Feck It it's the 'Youtube Spelling' Police ...RUN !!!!

  • could you also not straighten the bent shaft with a press ? Or just easier to replace it ? probably........

  • Too many spelling mistakes!

  • its verygood

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