Let me be perfectly clear, I do not know it to be a stub acme thread. It may very well be something completely different. I am told they bought it from their local John Deere dealer. I have never heard of a "farm implement thread" standard, nor has anyone else I work with.
I hope someone can help me. My team is investigating a field failure where the field crew bought a piece of all-thread and nuts that they claim is threaded with what they called a farm implement thread and then used it for something completely different than it's intended purpose. I have not put...
as long as it is hot dip and not electro-galvanized embrittlement should not be an issue, loss of properties due to tempering as mentioned perviously might be however.
there is a huge thread over in the structural forum on this. Hilti is making the replacement equipment. Power Fasteners supplied the original epoxy acrylate (vinyl ester) anchor material that failed. Epoxybot has the skinny on the chemistry and why it was not appropriate...
I would not use a resulphurized steel (1144) in a application where it could see cyclic loading. Free machining steels of this sort have terrible fatigue properties.
After reading all of this I'd venture to guess that everyone looking at it assumed someone else had verified things. This is the way of group projects, nobody takes ownership. The PE probably based his approval on a "baffle them with BS" dog and pony show by Power Fasteners' salesman based on...
Is heat such a bad thing in this application?=D I would assume that we are not talking about continuous duty here (several hours). for safety, it should be possible to thermally limit the device to lower power operation if overheating is an issue.
Ok, I misunderstood how it worked, I was envisioning a hydraulically actuated vise. After re-reading your post, it snapped how it worked to me. Sorry.
I agree you either have air in it, or a bad valve/seal somewhere in the system. The bellville's COULD be fatigued, but that does not sound like...
I believe Ion vapor deposition is going to be the process you'll need. I've seen it used on plastics before, the problem yo MIGHT have is if the glass spheres in the Syntactic foam rupture in the vacuum that they'll be sujected to. I've never tried to use syntactic foam in a vacuum so I'm not...
Heh, heaven forbid that the europeans would deign to use an existing working standard instead of creating their own incompatible one just to be different.
