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Belleville Washer

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Sigmo(at)aol.com
Guest

Posted: Mon May 01, 2006 4:08 pm Post subject: Belleville Washer

I am mounting a GT prop on a Jabiru 3300 engine. The diagram calls for six  

AN4-43A bolts and twelve PH11773N belleville washers. 

I have made searches on every search engine I can find and can not find the  

belleville washers with that part number. 

Can anyone tell me where I can get these using that part number or get the  

spech's needed to get them from a Belleville supplier?

 

Thanks,

Mike Sigman

N7092N

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Andy Silvester

Joined: 10 Jan 2006
Posts: 18
Location: Marica, Rio de Janeiro, Brazil

Posted: Wed May 31, 2006 5:26 pm Post subject: Re: Belleville Washer

Jabiru specify using Bellville washers for mounting Jabiru propellers, because the wood they use is softer (relatively) than is used by other prop manufacturers. The washers are made of spring steel and 'dished' so that when torqued correctly, they exert some axial load and therefore retain tension to accommodate the wood moving with changes in humidity etc. A stack of Bellvilles allows a greater tolerance of movement. 

In the case of the GT propeller, which uses a denser wood, you don't need them unless specified by GT. The same goes for all other prop. manufacturers; use their specified method of mounting. We stock the Bellville washers for use on Jabiru props.



Andy Silvester

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info(at)usjabiru.com
Guest

Posted: Thu Jun 01, 2006 6:17 am Post subject: Belleville Washer

Belleville washers can be found at www.mcmaster.com  part number 9712K68



Pete Krotje

Jabiru USA Sport Aircraft, LLC



--

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jetboy

Joined: 22 Jul 2006
Posts: 233

Posted: Tue Jul 25, 2006 1:24 am Post subject: Re: Belleville Washer

Please advise where the installation diagram is for those 12 washers? are they stacked together or opposing? 

   I have been finding low torque on the bolts every 5 hrs or so and would have fitted the washers had it been known they were called for.  I looked at all the downloads and my manuals and CD theres no reference there so this must have been introduced since my engine new 2 yrs ago.



Thanks

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_________________
Ralph - CH701 / 2200a

tonyplane(at)bellsouth.ne
Guest

Posted: Wed Jul 26, 2006 5:35 am Post subject: Belleville Washer

The washer are installed "toe to toe" i.e. ( ), under the nuts and are shown 

on Jabiru dwg C009013-1.  Go to Jabiru USA for their Zenith Firewall Forward 

and pull up "Fit  prop and spinner assy" found at 

http://www.usjabiru.com/Zenith%20FWF%20Images/79.%20Fit%20Prop%20&%20Spinner%20assy.PDF.



Note: Recommend you use the torque values recommended by your prop 

manufacturer vice those shown for Jab.   It is my understanding that the 

wood used in Australian Jab props is a little softer and therefore more 

"crushable" than woods used by prop manufactures such as Sensenich.



Tony Graziano

Zodiac 601XL; N493TG - 120 hrs.

--------------------

 	  Quote: 	
		    > Time: 02:27:44 AM PST US


	


 	  Quote: 	
		   From: "jetboy" <sanson.r(at)xtra.co.nz>

 Subject: Re: Belleville Washer



 



 Please advise where the installation diagram is for those 12 washers? are 

 they

 stacked together or opposing?

   I have been finding low torque on the bolts every 5 hrs or so and would 

 have

 fitted the washers had it been known they were called for.  I looked at 

 all the

 downloads and my manuals and CD theres no reference there so this must 

 have

 been introduced since my engine new 2 yrs ago.



 Thanks



 --------

 Ralph - CH701 / 2200a

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