Posted by Bhunt on March 16, 2017 at 07:20:16 from (67.1.127.120):
In Reply to: Connecting Rod Nuts posted by 37Chief on March 15, 2017 at 21:12:23:
Quoting Removed, click Modern View to see
I wouldn't put A nylon locknut on there and I don't think they would have used em back then even if they had em that nylons gonna degrade and in the end you'll have the equivalent a square stove nut
. Here are a few no-no's working with fiber-locking nuts:
Bolts with damaged threads, rough ends or a 5/16 inch or larger bolt with a hole in the shank and having burrs at the hole are unacceptable for use with fiber-locking nuts.
Do not tap (run a tap through) the fiber insert.
Fiber insert self-locking nuts are limited in application to a temperature of 250 degrees F. The reason for this limit is because the effectiveness of the self-locking properties will reduce beyond this point.
When proper preload of a bolt is applied and maintained, regardless of the equipment used to load the bolts in a joint, the bolt cannot fail from fatigue, because it will experience no change in stress Anyone can cause any fastener to fail by simply over tightening or under tightening it. To review, torque is used to turn a nut to stretch a bolt and provide clamping force. It is usually done with a manual, hydraulic or pneumatic torque wrench based on Thread pitch( Typically fine thread vs coarse thread. The pitch of a Bolt thread is a measurement of how closely the threads are spaced. It can be expressed as the number of threads per Inch and can be measured with a thread gauge) The Diameter of the bolt is also a factor as is the material strength and the engineered tension requirements for the load. Basically your best bet is to follow the engineering requirements on the tractor your working on they have a proven record. For instance if you apply torque with the nut at the cotter key hole or above it chances are good you will break the bolt or stud. There are other locking methods that have been used and would assure you the nut will not back off Case has used a washer-lip under the head of the bolt bend one flange up on the bolt the other down on the rod cap. That may work with a nut as well Ill add a picture.
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