No way would I use Lowe's (Chinese) bolts on something as critical as a prop. Aircraft quality for sure!
No way would I use Lowe's (Chinese) bolts on something as critical as a prop. Aircraft quality for sure!
Jim Ott
Portland, OR
Kitfox SS7 flying
Rotax 912ULS
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
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.
John Evens
Arvada, CO
Kitfox SS7 N27JE
EAA Lifetime
Chap. 43 honorary Lifetime
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.
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 Ã* REAL view of the installations ( mouting bolts, washer,..ect)
Thank's again JIM,Dave, Avid
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
If 5/16" diameter is what you need, AN5 bolts should be good, Jf.
John Evens
Arvada, CO
Kitfox SS7 N27JE
EAA Lifetime
Chap. 43 honorary Lifetime
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.
Jim Ott
Portland, OR
Kitfox SS7 flying
Rotax 912ULS
Also, I am a big fan of Nordlock washers for positive locking, especially if you don't have drilled bolt heads for safety wire.
Jim Ott
Portland, OR
Kitfox SS7 flying
Rotax 912ULS