Bolt inspection, vibratory conditions
Bolt inspection, vibratory conditions
(OP)
I have a pretensioned bolted connection that always sees a rather high level of vibration where I want to use loctite thread locker to prevent bolt rotation, not safety wire. Does anyone have a clever & durable way of marking the bolts for inspection to determine whether or not there has been any unwanted rotation?
In the past I have ground a thin match line into the bolt head and steel using an abrasive wheel or provided match marks with paint.
Are there any less expensive options other than safety wire that you know of that ENSURE the bolts are not rotating?
Thanks!
In the past I have ground a thin match line into the bolt head and steel using an abrasive wheel or provided match marks with paint.
Are there any less expensive options other than safety wire that you know of that ENSURE the bolts are not rotating?
Thanks!





RE: Bolt inspection, vibratory conditions
Larry
RE: Bolt inspection, vibratory conditions
Regards,
Cory
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RE: Bolt inspection, vibratory conditions
For visual inspection rather than prevention, there are triangular washers you can use - set them to point up - if the bolt comes loose the washer moves. They are often used on wheel nuts of lorries.
This allows for resetting following retensioning which can be a problem with paint marking
RE: Bolt inspection, vibratory conditions
Then use a drip of "Lock Tight"
Then Mark with Steel marker that will leave a (semi)permanent line from the bolt, cross the washer, to the base material. seem mcmaster carr "Metallic Color Paint Markers"
any rotation is easly noticable
RE: Bolt inspection, vibratory conditions
I dont like Ny-locks, I have seen workers destroy the plastic $h!T with an air wrench.
RE: Bolt inspection, vibratory conditions
Loctite is fine if you are confident that the threads will be clean.
Safety wire DOES NOT ensure that bolts will not rotate.
Google for Torque Seal for a frangible visual indicator of rotation (it does nothing to prevent rotation).
RE: Bolt inspection, vibratory conditions
http://www.boltscience.com/pages/quality.htm
RE: Bolt inspection, vibratory conditions
RE: Bolt inspection, vibratory conditions