Hello everyone,
Today I'm designing an assembly that must be 100% 316 S/S and I have good reason to use button head socket hex head screws.
It's been my experience on small assemblies that these hex driven heads can strip out. So I assume my usual torque specifications for 316 S/S are too...
My company designs gear reducers with attachments. The balance quality of the attachments follows our company standards but it's a very basic practice. These are rigid rotors operating safely below first critical speed.
Balance quality can be calculated from the allowable bearing forces. How...
I have some customers who use BIM software like Revit.
I recently tried sending .SAT files of a 3D assembly but they couldn't import it. Then I tried .DWG files (confirmed in AutoCAD 2015) but again no joy.
Does anyone have a bulletproof, one-step conversion method? Ideally it would work on...
I have some gear-driven machinery where the customer will only perform maintenance when the unit is unable to rotate. The impeller end of this machinery cannot be taken out of the process flow and so it tends to rotate in either direction after de-powering it. Is there a proven product that...
My team did limited testing in making the jump from Creo 3 to 5. The new GD&T behavior caught us by surprise.
Technically we are not having issues and don't benefit from migrating all of our annotations every time we open and tweak a drawing. So the GD&T warnings and errors are costing us...
I will not reveal the specific topic because of course, this site is not where we conduct business.
My company produces machinery and not all of the components are fully designed in-house. Bearings, motors, seals, sensors, etc.
I have more than one topic in which the tech support coming from...
It's been decided that our Engineering team will be implementing a PLM system in 2019. 10 users. Moderately sized assemblies and no concurrent engineering. Three sites globally, one in UK, two in US, for now.
My last interaction with PLM was over 15 years ago in the days of Intralink. The...
We produce rotating equipment where the majority of the machine is overhung and unsupported. Steel and stainless steel, rotating on roller bearings. Our industry standard practice is to calculate first lateral and keep operating speed at 75% or less. Also practice is to mount this equipment...
Hello,
I have a bit of a technical challenge, in that we have some geartrain designs that were converted from nitrided helical gears to carburized and ground some years ago. The same diametral shrink fits were carried forward (for example, .0015T/.003T on a 2.75 nominal), which calculates to...
My company provides equipment in a variety of corrosion-resistant alloys.
We have done duplex in the past and had a few more mechanical failures (cracking) particularly around HAZs. Even with greatly reduced stress limits we couldn't stay out of trouble.
I have a few areas of focus to get...
I need to check concentricity in several mechanical seal installations ranging from 65mm to 90mm shaft diameter. Shaft is non-magnetic 300 series stainless steel. I'm looking for a compact shaft mount for a lever ("Last Word") indicator to measure the concentricity between the shaft and the...
My company builds rotating machinery and frequently handles customer specifications. Unfortunately, many specs are not optimized for our type of equipment so we expend energy dealing with exceptions and clarifications.
Internally this means we must:
- Identify all of the real world...
My team is faced with a constant barrage of requests to perform work. They come from several sources in the company and the scope varies widely. Keeping track of who is doing what, when they'll be done, and how/when the next new thing will be done is a major challenge. Let's say we have 6...
I am not a gear guy, but I work with one. Is there a practical way to cross reference ANSI/AGMA 2001 Grade 2 material cleanliness against Euro steel specs (i.e. 4320H for 18CrNiMo7-6)?
My gear guy insists that all of our material, even when using a euro vendor, must have Grade 2 cleanliness to...
I need to redesign a very basic component that connects a slender cylinder to a plate that is roughly perpendicular to the axis of the cylinder. I see a basic topology optimization study could help us use less material.
I'm not excited to add a suite of software to our portfolio and go through...
My company is finally putting an email retention policy in place. This is to limit legal costs in the event of a lawsuit and also to keep our email system costs in line.
For the last 15 years I've simply kept all email within my Inbox and relied on searching. Call it the Gmail philosophy, I...
I've been looking around for any standards or best practices that help a designer (me) communicate the finish quality of welds - both to my fabrication vendor and to my customers.
Bottom line, customers expect everything ground and polished (for free) like a medical device and fab vendors...
My company purchases welded components in low carbon or 304 or 316 stainless steel. The welding is usually continuous fillet welds ranging from .19 to .5 nominal size.
Occasionally a customer wants the welds "ground smooth". This creates troublesome expectations because I've not seen a...
We have an older CAD program called ExpertCAD. It is supported on the latest builds of Windows, but you can tell it uses older Windows APIs. It performs oddly when run from a server or over long-latency connections in a way modern Windows programs do not.
IT really wants to move us to a...
I have a need to inspect shafts for wear in the field. The most accessible I can provide is such that the important journal (say 2.5 dia) is still surrounded by a housing with 8.25 ID. Need +/-.0005" on diameter accuracy or better.
This obstructs the use of any common measuring tool. A 2-3"...
