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81nautique 
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Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5778 |
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 Posted: July-07-2017 at 12:15pm |
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Not to beat this to death but I stumbled onto the patent info, regarding the coupler taper it appears the steep taper was deliberate to facilitate "easy" removal and decrease man hours required.
From the patent application "A coupling receives a steeply tapered end of a propellor shaft and is secured thereto with a lock nut held in place with a set screw. A housing taper is steeper than known locking tapers to facilitate housing removal. The housing is internally threaded to receive an extractor element which, after lock nut removal, is screwed into the housing for abutment with the end of the propellor shaft with continued advancement of the extractor element resulting in housing separation from the shaft." full link |
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Riley
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Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7953 |
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Posted: July-07-2017 at 12:21pm |
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Just curious, is everyone that has bought one of these using a torque wrench to lock the shaft into the taper? Does that matter?
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phatsat67
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Joined: March-13-2006 Location: Indiana Status: Offline Points: 6157 |
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Posted: July-07-2017 at 12:45pm |
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Ken, is that coupler side splined too? MC has used splines for propellers for a while now.
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tryathlete
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Joined: April-19-2013 Location: Lake Villa, IL Status: Offline Points: 1797 |
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Posted: July-07-2017 at 1:00pm |
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Splines on both ends seems like a winner to me. There must be some logical reason why the keyway is used instead of splines.
From wiki Splines are ridges or teeth on a drive shaft that mesh with grooves in a mating piece and transfer torque to it, maintaining the angular correspondence between them. ... An alternative to splines is a keyway and key, though splines provide a longer fatigue life. |
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Duane in Indy
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Joined: October-26-2015 Location: Indiana Status: Offline Points: 1578 |
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Posted: July-07-2017 at 1:16pm |
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More than likely a 10" crescent and a piece of pipe 
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Keep it as original as YOU want it
1978 Mustang (modified) |
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: July-07-2017 at 7:03pm |
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And please, anti seize on the nut threads. |
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KENO
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Joined: June-06-2004 Location: United States Status: Offline Points: 11059 |
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Posted: July-07-2017 at 8:20pm |
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The ones I've seen had splines on both ends, but I don't know if they all are |
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Duane in Indy
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Joined: October-26-2015 Location: Indiana Status: Offline Points: 1578 |
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Posted: July-07-2017 at 8:55pm |
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Don't forget-----use a brass nut
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Keep it as original as YOU want it
1978 Mustang (modified) |
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Riley wrote: