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Compass Marine How To | all galleries >> Welcome To >> A New Prop Shaft > Spotting The Shaft
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Spotting The Shaft

Spotting The Shaft

After the coupling has been fitted to the shaft the set screw hole needs to be "spotted" into the shaft. The drill press is spotting the shaft in this picture.

Spotting is the creation of a small dimple in the shaft for the head of the set screw to recess into. If your shaft is not spotted for the set screw/screws you have an poorly machined shaft. Some unscrupulous vendors cut this corner.

Panasonic Lumix DMC-ZS3
1/60s f/3.9 at 9.7mm iso200 full exif

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