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Date: Mon, 16 May 2005 16:21:26 -0600
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
From: Bill Dube <bdube@al.noaa.gov>
Subject: Re: [FlyRotary] Re: I need misc engine parts
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At 03:50 PM 5/16/2005, you wrote:
>Kelly,
>I found a local Company who  does rolled threads, but will only do a 
>minimum of 16, I said I can handle that - but I don't know whether to cut 
>down 12 A bolts, cut down 13B bolts or get some high tensile rod and make 
>new ones.

         What length and diameter do you need exactly?

         200 mm M8 studs are an off-the-shelf item, for example. So are 
200mm M8 bolts with 101,000 psi rating.

         McMaster Carr has a pretty good stock of this sort of thing.

         http://www.mcmaster.com/


>Any suggestions on the best way to go?
>
>Someone suggested the 13B's are necked-down, I will have to check on this.
>There is also the suggestion of threading both ends, in a stud 
>configuration. This may not be necessary if using 12A bolts, but does 
>allow for some variation in length
>George,
>    Bill is correct of course about rolled threads being the way to go but 
> here
>in the middle of the USA availability and affordability are a 
>problem.......I do
>not have my 12A bolts in front of me at the moment and will have to double
>check if the threads are proud of the bolt diameter on the ones I 
>have.........
>
>--
>Kelly Troyer
>Dyke Delta/13B/RD1C/EC2
>
>Kelly,
>  If someone can find how long the bolts need to be I can see if we can 
> find a source to mail order them. ARP fasteners are a high quality 
> automotive source. <http://www.ARP-bolts.com>WWW.ARP-bolts.com
>We should check to see if they will make studs to replace the 13B bolts.
>Bill Jepson