Nyloc nut on eyebolt: How tight?

ActingLikeAKid

Well-Known Member
Joined
Nov 16, 2015
Messages
1,134
Reaction score
15
Putting in an eyebolt on an HPR rocket. I'm using a nyloc nut so it won't back off. It occurred to me that if I leave it a tiny bit loose, that will let the eyebolt spin freely during recovery, which should reduce twisting in the gear. Any reason not to do this? Or should I snug it down securely?
 

JJSR

Well-Known Member
Joined
Dec 12, 2012
Messages
776
Reaction score
65
It would depend on where your putting it.
But I would think where ever you put it ,centering ring, av bay, it would eventually start to brake through it from all the load jerks it will get
 

Kruegon

Well-Known Member
Joined
May 20, 2014
Messages
1,885
Reaction score
4
I use the same on my builds. I usually tighten it down. Any slack could cause the bolt to snatch at the connection point. Almost like jerking the head of a hammer against something. Snug with reasonably wide washers will reduce the strain that a loose bolt impact would cause.
 

Banzai88

Lvl 2, Wallet..even more destroyed
TRF Supporter
Joined
Jul 15, 2015
Messages
3,079
Reaction score
1,409
Also, you don't want a working joint of hard parts down deep in the airframe. That purpose is best served with a swivel.
 

ActingLikeAKid

Well-Known Member
Joined
Nov 16, 2015
Messages
1,134
Reaction score
15
Well, that answers that pretty unequivocally :)

Next question: The eyebolt is load-rated (500, I think?) and the threaded part is about 2" long. I need less than half of that. I'm thinking
-If I cut it, I'll need to clean up the threads a little, but it would save me a bit of weight. Don't think it would hurt anything
-If I leave it as is, I'm sending an extra few grams up. I'm leaning toward leaving it alone. Thoughts?
 

rharshberger

Well-Known Member
Joined
Oct 13, 2014
Messages
11,428
Reaction score
3,321
Location
Pasco, WA
Trim the length, if its longer than the nut you are not gaining any strength, and as you pointed out the extra length is just extra weight.
 

Nathan

Joined
Apr 19, 2012
Messages
2,206
Reaction score
674
I do that with bolts and threaded rods all the time. Bolt cutter will mash the threads a little so just remove about another 1 mm with a file until you get to good threads.
 

Dave A

Well-Known Member
TRF Supporter
Joined
Jan 21, 2013
Messages
1,236
Reaction score
196
Use large fender washer under the nyloc nut anyway, if loose it can't pull out. Otherwise use a swivel on your recovery equipment.
 

Jarhead

Well-Known Member
Joined
Sep 30, 2013
Messages
308
Reaction score
4
Awesome. Thanks, y'all. Now, if I could just find my !#@!~$ hacksaw....
Before I cut I always run a standard nut on past the cut line. After cleaning the threads with a file removing the nut chases the threads for me.
Little something my dad taught me....
 

ActingLikeAKid

Well-Known Member
Joined
Nov 16, 2015
Messages
1,134
Reaction score
15
Before I cut I always run a standard nut on past the cut line. After cleaning the threads with a file removing the nut chases the threads for me.
Little something my dad taught me....

Thanks for the reminder. One of those "I used to know that...." things :)
 

dmgrime

Well-Known Member
Joined
Jan 4, 2015
Messages
257
Reaction score
27
So simple I love it! Ended up using a die to rethread my all rod. Doing this from now on! Thanks!
 
Top