Keep your nuts on....
Thread Starter
Melting Slicks
Joined: Aug 2006
Posts: 3,429
Likes: 20
From: Kingston Ontario
Keep your nuts on....
We just had a little seminar at work about the lock washer. It was said many years ago that the split lock wash is a useless piece. Here's some info I found. BTW, our machines all came with split lock washers. We are now getting rid of the washers and stocking Nordlock washers. The best out there. Something to consider when putting together our chassis. Here's some info on split lockwashers that a lot of us didn't know. They do vibrate loose quite easily unlike the Nord-lock washer...much better design.
http://www.eng-tips.com/viewthread.c...=114051&page=1
http://www.plantservices.com/articles/2002/347.html
http://www.eng-tips.com/viewthread.c...=161524&page=1
Page 12 of this article
http://www.pirate4x4.com/tech/billav...lts_signed.pdf
Here's the washers I like
http://www.stanleyind.com/product/wa...lock/nord.html
http://www.nord-lock.com/
http://www.boltmasters.com.au/main/n...rs/2004-10.htm
http://www.eng-tips.com/viewthread.c...=114051&page=1
http://www.plantservices.com/articles/2002/347.html
http://www.eng-tips.com/viewthread.c...=161524&page=1
Page 12 of this article
http://www.pirate4x4.com/tech/billav...lts_signed.pdf
Here's the washers I like
http://www.stanleyind.com/product/wa...lock/nord.html
http://www.nord-lock.com/
http://www.boltmasters.com.au/main/n...rs/2004-10.htm
Thread Starter
Melting Slicks
Joined: Aug 2006
Posts: 3,429
Likes: 20
From: Kingston Ontario
MacMaster Carr like the one guy said. There is a strict procedure to prevent loosening by only having the washer between the nut or bolt head and the flat surface. The head engineer at or place did some investigating and were throwing out the split lock washer.
Le Mans Master
Joined: Jan 2000
Posts: 8,918
Likes: 27
From: New Hill NC
The split washer has been used for a hundred years with great success. Sounds like someone just wants to sell some new washers. Sure they might be better in some applications, but they aint necessary on most auto applications. I dont go squirrel hunting with my cannon.
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Thread Starter
Melting Slicks
Joined: Aug 2006
Posts: 3,429
Likes: 20
From: Kingston Ontario
The split washer has been used for a hundred years with great success. Sounds like someone just wants to sell some new washers. Sure they might be better in some applications, but they aint necessary on most auto applications. I dont go squirrel hunting with my cannon.
Advanced
Joined: Mar 2007
Posts: 69
Likes: 0
From: Superior Wisconsin
I've been using them for the last 2 years on my race and trail sleds and never had a bolt or nut back out.
I been using them on the exhaust manifolds where I had problems with the bolts backing out even after using Loctite but then I got a tip from a well know engine builder to give these a try and never had one problem.
I'm using them on a 72 chevelle right now on my header bolts and never had to tighten them yet!!!
I been using them on the exhaust manifolds where I had problems with the bolts backing out even after using Loctite but then I got a tip from a well know engine builder to give these a try and never had one problem.
I'm using them on a 72 chevelle right now on my header bolts and never had to tighten them yet!!!
Thread Starter
Melting Slicks
Joined: Aug 2006
Posts: 3,429
Likes: 20
From: Kingston Ontario
I've been using them for the last 2 years on my race and trail sleds and never had a bolt or nut back out.
I been using them on the exhaust manifolds where I had problems with the bolts backing out even after using Loctite but then I got a tip from a well know engine builder to give these a try and never had one problem.
I'm using them on a 72 chevelle right now on my header bolts and never had to tighten them yet!!!
I been using them on the exhaust manifolds where I had problems with the bolts backing out even after using Loctite but then I got a tip from a well know engine builder to give these a try and never had one problem.
I'm using them on a 72 chevelle right now on my header bolts and never had to tighten them yet!!!
Melting Slicks
Joined: Feb 2003
Posts: 3,053
Likes: 4
St. Jude Donor '03,'11
i'm not convinced that system will work with conventional nuts. Sure the two pieces are designed to fit properly together and not slip, but you still have a nut with a smooth face trying to slip on a simple ribbed surface. I think it will still slip.
Drifting
Joined: Oct 2004
Posts: 1,496
Likes: 1
From: Lafayette Louisiana
It seems this is another of those "opinionated" subjects. I read an aricle that detailed nut and bolts, harndess scale etc. and their expert stated that a properly torqued nut and bolt did not require a lock washer. Now, after reading that do you think I throw all my split washers away? Not a chance, but I am also not going out of my way to change washers just because someone has a better one.
Melting Slicks
Joined: Oct 2004
Posts: 2,662
Likes: 8
From: Knoxville Tennessee
Most of the fasteners I use come from Caterpiller. They are grade 8 bolts and nuts. They also make nylon and full metal lock nuts which I use whenever possible. I use them primarily because they sell them where I work but their quality is second to none. Just another great source for fasteners!
Bernie
Bernie
Melting Slicks
Joined: Oct 2004
Posts: 2,662
Likes: 8
From: Knoxville Tennessee
I have use split lock washers a long long time and never had a bolt or nut loosen. But, again I use top quality Caterpillar hardware. There is a huge difference in the quality of fasteners. Always use the best!
Bernie
Bernie
Le Mans Master
Joined: Nov 2004
Posts: 6,434
Likes: 0
St. Jude Donor '07
If it's important use locktite
Thread Starter
Melting Slicks
Joined: Aug 2006
Posts: 3,429
Likes: 20
From: Kingston Ontario
The back side of each piece is ribbed so it won't slip. Split washers when they are torqued are flat. If you use a high grade bolt with a split washer and put the washer on the bolt head end it won't grip as easy as it would on the nut side since the nut isn't as hard as the bolt. We've seen the mark that split washers occasionally make on the nut, you rarely see it on the bolt. That little burr other than torque is what helps a split washer where as the nord-lock has two ribbed sides. To each his own, for the cost it's good insurance. Locktite is an option, once the bolt is loose at least the nut won't fall off....BUT...once the bolt is loose it loses all it rated holding/sheer strength. Something to consider.
Limping across the line
Joined: Oct 2002
Posts: 5,299
Likes: 109
From: Peoria Az
More fuel for thought: On any of the aircraft I have worked on the split lock washer is a very rare piece of hardware. Usually only used where a soft metal is found. In fact the only place I can recall using them is on the leads to the generator posts.
Aircraft are subject to all types of vibration and mainly use flat washers. All nuts are of the self locking or castlellated/cotter pin type.
My opinion if I can get away from the surface maring properties of a split lock nut I will
Aircraft are subject to all types of vibration and mainly use flat washers. All nuts are of the self locking or castlellated/cotter pin type.
My opinion if I can get away from the surface maring properties of a split lock nut I will