Thank you for that reference. It is very thorough. Amazing.
Cockroach, as Terry mention (but I failed too in my original post) the spline I am planning to make has an involute profile (30 degree), so it is not as simple as having just several keys, but thank you for your comment.
Terry,
Thank you for your thoughts. I understand what you are saying and I am on the same page as you on every aspect. I am intrigue where those reference stresses came from and how could I adapt them if not using steel. I am trying to avoid using something like FEA since my guess is that it...
Hello experts,
I am in the process of designing a spline and I am using a few references to achieve that. For stress analysis I am using the Machinery's Handbook, shigley's and for tolerance and form I am using ANSI B92.1 standard.
There is one step of the process that I find troublesome. The...
Hello experts,
I am in designing a disc coupling for a custom application and I having some issues keeping the stresses under control. Almost all manufacturers use multiple thin disc stacked together. I understand that this is a good idea since cracks cannot propagate from one disc to the next...
KllrWolf,
You can have misalignment by having crowned teeth and the allowed misalignment will depend on the teeth design itself. Now the ANSI/AGMA 6123-B06 mentions that if you don't have crowned teeth in your spline you will have issues if your misalignment goes beyond 0.001 rad.
Here is also...
Mike,
Yes, The splicing has always been my concern, and I had assumed that I would just consider that the week spot and reduce the life of the rope by 20% (this is what I have heard). One the sheaves would have to be mounted on a flexible mount to not have sudden tension increases when the...
Chicopee,
Thank you for your comments. Is there one that you would recommend that covers the topic? I have a very old Shigley (3rd edition) and there nothing on this topic (closest thing it has is belt drives).
From the research I have done it seems that in most of the application it is the...
Hello experts,
Is there someone out there that has used SST wire rope in an application where you would normally use a belt? i. e. Where you have a driver motor and a driven load.
Could you in theory replace the belt for a SST wire rope loop/sling?
I have seen similar things in conveyor...
Thank you for your answers. Micalbrch, thank you for that document. I think 2 mechanical seals with a flush fluid (oil?) going through is the way to go. It seems like a back to back arrangement guarantees no leakage, but I would prefer a tandem arrangement. Is it possible for water to leak...
Hello experts,
I am designing a gearbox that needs to be submerged in water at 10 psi with a shaft coming into the water. My biggest challenge here is how to seal that shaft completely. I need to keep water from the area where the gears are in order to guarantee life and lubrication quality...
TVP,
Thank you for your recommendations. That NPL guide on SCC is very nice. Loved (and hated) this part:
"Finally, of course, Murphy’s Law dictates that the materials
that are resistant to SCC will almost inevitably be the most
expensive (and that they will be found to be susceptible to
SCC...
Also, Ed, would avoid the use of 17-4 PH H1025? The literature I found mentioned that it has good corrosion resistance to chloride environments.
Are there any mathematical models that could aid me in predicting what levels of stress are acceptable under certain chloride concentrations?
I perhaps should add that the maximum stresses are around 120 ksi.
Due to shaft features (shoulders, keyways, etc) and I am not getting an infinite life (a requirement here).
Ed, I appreciate your advice. I checked with 2507 and wouldn't work. I haven't check k-500 and 625. Can you asses me...
metengr,
We have been using 17-4 in the same environment but this application is more demanding strength-wise. We have also maxed out the diameter to match the largest ID from off the shelf components that go on the shaft. Ideally, we could choose a stronger material and stick with the current...
Hi,
I am designing a shaft that needs to be submerged in water with something like 500 ppm of chlorides (KCL, NaCL, etc). PH is around 8.0. Temperature is ambient. We have used SST 416 and evidenced pitting (stress corrosion cracking?). We moved to 17-4 H1025 with great results but currently we...
Hi,
I am designing a shaft that needs to be submerged in water with something like 500 ppm of chlorides (KCL, NaCL, etc). PH is around 8.0. Temperature is ambient. We have used SST 416 and evidenced pitting (stress corrosion cracking?). We moved to 17-4 H1025 with great results but currently we...
Hello,
I have been trying with no success to import our legacy files into the TC database. We are using TC 8.3 and our NX Native files are a mixture of NX 7.5 and NX 6.0 and we have lots of them.
Every part has a PART_NO Attribute and a PART_REV attribute.
Using the TC NX tool for importing...
Thanks Didier!
For some reason we don't have TC Command Prompt on the clients, so had to set the variables manually on the windows command prompt. But it worked flawlessly!
Best,
Rodrigo
Hello Didier,
I am trying to do the same thing but running tcin_templates_setup.bat -u=infodba -p=****** -g=dba seems not to be working for me. Any idea why? Do you run this .bat from command prompt?
It seems that no files are being uploaded to the database.
Thanks in advance,
Rodrigo
