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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> Jett Engineering Support >> Stud length
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Stud length - 11/24/2005 8:32:05 PM   
MJD


 

Posts: 1563
Joined: 5/27/2003
From: Orangeville, ON, CANADA
Status: offline 		Now there's a subject line that could raise an eyebrow..

Hi Bob,

I was fiddling with my pylon prop assortment just received from APC, and when fitting one to my SJ50 last night to admire it I was concerned about the very small amount of prop stud remaining. The stud on mine measures 0.70" long, and the hubs on these 8.8" props measure around 0.56" - 0.57", leaving barely over 1/8" of thread engagement. That seems marginal to say the least, esp. with aluminum threads.

What's the scoop?

Thanks,

MJD
       Post #: 1

RE: Stud length - 11/29/2005 3:57:45 PM   
bob27s



Posts: 4740
Joined: 4/9/2002
From: Cleveland, OH, USA
Status: offline 		Hey...

Thanks for writing

The threaded stud can be adjusted a bit. Dub also has 2 sizes available if needed.

The normal installation on the prop stud, is to thread it into the crankshaft all the way until it stops, then back it out about 2 turns. You do not want it to bottom out in the crankshaft.

To make it longer, you can back the stud out a bit more. Take the stud out, thread it back in a mimimum of 8 turns. This gives you about 3/16" of adjustment.

Bob


_____________________________

Bob Brassell
Jett Engineering - Engine Mfg Support Forum Host

(in reply to MJD)
       Post #: 2

RE: Stud length - 12/13/2005 11:11:52 PM   
MJD


 

Posts: 1563
Joined: 5/27/2003
From: Orangeville, ON, CANADA
Status: offline 		Ah yes.. I never even tried, but the stub loosened up with a gentle tweak, and indeed I can get it in 8 turns or more and have enough engagement for the pylon prop hubs. That was simple..

Ya loin sometin' new every day..

Thanks!

MJD

(in reply to bob27s)
       Post #: 3

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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> Jett Engineering Support >> Stud length
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