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Old 10-15-2019, 02:53 PM
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Norway, Rogaland, Tananger
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Spinner backplate and prop

Hi there. How easily should the bolt enter and go through the spinner backplate and the prop? Its very tight in my case.
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Old 10-15-2019, 03:00 PM
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United States, AZ, Mesa
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That's to tight.
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Old 10-15-2019, 03:00 PM
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What size bolts?
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Old 10-15-2019, 03:57 PM
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Des Moines, Iowa USA
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I prefer a rather loose fit so the parts can align w/o putting any strain on any of the parts. I would call the fit a normal bolt to bolt hole fit. I see in an earlier post you have an EME35. If you are referring to that engine here, it uses 5mm bolts where most engines that size use 4mm. That could account for your tight fit.
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Old 10-15-2019, 06:46 PM
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Should be ZERO interference between the washer, prop hub and spinner backplate. When drilling the prop, the best practice is to use a drill press. When using the drill press, the best method is to peck drill the hole. Peck drilling is basically drilling a little, release pressure, and begin drilling again. The bit gets warm and begins to wander when making your hole. Causing an interference fit. Also, drilling your prop and backplate 1 size larger than the major diameter of your bolt hole helps too. Usually, 1 size means about .015" or 1/64".
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