Sure Mic Crank?

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Topic author
ThreePedalTapDancer
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Joined: Sun Nov 24, 2019 2:29 pm
First Name: Ray
Last Name: M.
Location: Southern California

Sure Mic Crank?

Post by ThreePedalTapDancer » Sun Jan 26, 2020 9:47 pm

I have a Sure Mic counterweighted crank I recently retrieved from a estate. Is it a boat anchor or does it have value?
7A60A81C-E41D-4F2C-9B16-F30450E2998C.jpeg


Dan McEachern
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Location: ALAMEDA,CA,USA

Re: Sure Mic Crank?

Post by Dan McEachern » Sun Jan 26, 2020 9:57 pm

1) measure the journals 2) have it magnafluxed.


Topic author
ThreePedalTapDancer
Posts: 72
Joined: Sun Nov 24, 2019 2:29 pm
First Name: Ray
Last Name: M.
Location: Southern California

Re: Sure Mic Crank?

Post by ThreePedalTapDancer » Sun Jan 26, 2020 10:04 pm

-13, -20, -25,-30.


noelchico
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Board Member Since: 2005

Re: Sure Mic Crank?

Post by noelchico » Sun Jan 26, 2020 11:19 pm

I have one in my 26 and it is smooth. Some have had problems with them but I suspect that if they have lasted 100 years they'll last a few more.


Kerry
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Last Name: van Ekeren
Location: Rosedale Vic Australia

Re: Sure Mic Crank?

Post by Kerry » Mon Jan 27, 2020 12:17 am

They do crack, so as Dan posted, the first thing is a crack test, if you are not willing to invest or take a chance on doing your money, then the buyer would take that chance, so sort of makes it worthless at a buyers prospective.


Les Schubert
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Location: Calgary

Re: Sure Mic Crank?

Post by Les Schubert » Mon Jan 27, 2020 2:28 am

If I interpret your undersize measurements correctly, one of the journals is.030” worn.
I make it a policy to not use a crank that is smaller than.020” undersize.
My “rationale” is that the crank has too many “cycles” of use and is beyond its useful fatigue life.
Just my policy.
Additionally I will only use a Sure Mike in a comparably stock configuration engine, not in one significantly “souped up”


Ralph F
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Last Name: Fitz-Gerald
Location: Monkton, Vermont

Re: Sure Mic Crank?

Post by Ralph F » Mon Jan 27, 2020 7:32 am

I have sure Mic in my 15 touring. My father found this crank in a busted block in the late 50. I just had the motor rebuild 2 years ago by Pats Restoration and it still usable. I don't drive much over 35 mph.
Fitz

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