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Old 09-02-2017, 07:12 PM   #11
jiott
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Default Re: Ivoprop ifa bolts

No way would I use Lowe's (Chinese) bolts on something as critical as a prop. Aircraft quality for sure!
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Old 09-02-2017, 07:46 PM   #12
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Default Re: Ivoprop ifa bolts

In my case, the prop bolts screwed into the prop flange. (582 Rotax) The lock nuts were just an added safety feature. Don't think IVO even requires a lock nut on their bolts that screw into a prop hub. Just looked on their site and didn't see any shown or mentioned. I completely agree with you on aircraft grade nuts if they are actually holding the prop on. JImChuk
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Old 09-02-2017, 07:46 PM   #13
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Default Re: Ivoprop ifa bolts

Quote:
Originally Posted by jiott View Post
No way would I use Lowe's (Chinese) bolts on something as critical as a prop. Aircraft quality for sure!
I absolutely agree with you, Jim! Propeller bolts are always considered one of the more critical hardware applications, in my experience. You want something that's spec'd. properly, with a known pedigree. Prop bolts can be subjected to very high stresses, and a failure can result in a very bad day. It seems like we're mixing bolts and nuts here too.
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Old 09-02-2017, 08:01 PM   #14
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Default Re: Ivoprop ifa bolts

Just went back and reread my first post, and I did say Chinese bolts, when I meant to say nuts. No way would I have used Chinese (knowingly)?? (who knows where IVO gets theirs from these days) bolts from Lowes to hold the prop on. The bolts I used came from IVO. I wouldn't be a bit surprised that nuts bought on ebay were probably from China as well. JImChuk
PS sorry for the confusion I added to the topic.
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Old 09-03-2017, 07:03 AM   #15
Jfquebec
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Default Re: Ivoprop ifa bolts

I agree with you...but since one week i loocking for bolts and nut..
But..you dont think M8 bolts from everywhere are the same grades??
The best i want is to find these bolts and nut on aircraft spuce..
On my 912 80 hp ..i dont have thread in prop flange..so ..i need nylon nut.
I was angry to dosent find any precise information, like a plan with all i need..
Like you said.. propeller it's a critycal part..😩
I send a email to ivoprop to ship me some bolts and nut but he send me back im not in there computer ?????
I will re try to order from ivoprop..and i will try to have REAL view of the installations ( mouting bolts, washer,..ect)

Thank's again JIM,Dave, Avid
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Old 09-04-2017, 04:48 AM   #16
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Default Re: Ivoprop ifa bolts

hohoho...
after more ivestigating,here's what i find..

here...http://microlighters.co.za/viewtopic...6fb17ec0137cbc


912S and late model 912 80 hp 75 mm flange pattern for Ultrailght model propeller bolt holes are not threaded

so we use the stronger AN5 BOLTS,


so my flange are not thread (early model)
maybe AN5 is my option...
what do you think gentleman

Jf
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Old 09-04-2017, 10:22 AM   #17
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Default Re: Ivoprop ifa bolts

If 5/16" diameter is what you need, AN5 bolts should be good, Jf.
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Old 09-04-2017, 10:37 AM   #18
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Default Re: Ivoprop ifa bolts

FWIW, always use the specified bolts; if you use a grade 8 bolt where a grade 5 is specified you might think the 8 is stronger so overkill is good. Wrong! The 8 is stronger alright, but when you apply the specified torque the bolt will not stretch as much as a 5, so you lose much of the spring effect that keeps the bolt from loosening under vibration, stress cycles, etc.
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Old 09-04-2017, 10:40 AM   #19
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Default Re: Ivoprop ifa bolts

Also, I am a big fan of Nordlock washers for positive locking, especially if you don't have drilled bolt heads for safety wire.
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