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Hello, I'm in way over my head as I've been asked what it will take to get our product (metal/plastic fasteners)code approved in south Florida. I am a mechanical/manufacturing engineer and have no idea what building codes might be? I've found that the codes and test standards are a rabbit hole...

We have some components that need to meet a 1000 hr salt spray test. Anything thicker than a G90 hot-dipped zinc will make the part not function in use. Other than redesigning the part to accommodate a thick coating, is there any alternative to hdg for a low cost thin coating that will pass...

Hi All, Thanks for the feedback, and I thought I'd give an update. First we just tried to schedule the forklift charging to off times from the engraving, but a better filter was needed too. The UPS helped a little, but but was really needed was a filter with more attenuation. The Furman unit...

Hello, Does anyone know of a brand-name or supplier of a rubber/metal shim/rubber type of laminated gasket material? I've seen them many times but don't know what that type of sandwich is called. Thanks...

Hello, We have a benchtop engraving machine that was stalling and was erratic sometimes. We narrowed it down to EMI from a forklift charger on the other side of the cement block wall. This unit is supposed to run on 120V single phase, and this is a 60+ year old building that's running 123V...

We currently have some aluminum die castings that are painted silver after machining solely for appearance. We're thinking it might be a cost reduction to grit-blast instead of painting as the end result would look similar, and in use the paint wears off in a short time anyway. Parts would...

Josef, You should also look at product specs, namely nozzle diameter, and as mentioned, material choice, to get what you're looking for. Some of the units cited here may be better suited for hobbyists, and others are more geared towards professional use. I think the adage "You get what you pay...

We just got a Dremel 3d45 FDM machine and I can't believe how well this machine works. https://digilab.dremel.com/products/3d45 The cost is roughly $1900 US, and it takes PA, ABS, & PET materials, the tolerance seems typical for this type of machine although I haven't really run it through it's...

These are threaded assemblies with no abutting shoulder to induce tension, so we rely on loctite only. As stated earlier, #638 was chosen for being far and above the highest strength. Yes, it is more viscous, and the gap filling capabilities rate at .010 in, but that is the maximum gap, not...

Thank you all for your comments, so here's an update to what we've been able to find out. It seems our overseas supplier is applying a corrosion inhibitor to the aluminum parts since they sit on the water for a month, so the loctite won't cure properly in the presence of nitrates. The short...

Were having issues with steel to aluminum loctited assemblies coming loose. Normally they'll withstand 40 ft-lbs. of torque, but when they fail, it's only at 5 ft-lbs. We clean and rinse parts, and use primer and #638 retaining compound for strength. When we take the failed assemblies apart...

Thanks Ed!

We have some sheets of S7 material and are unsure of the grain direction. Is there an industry standard which way the stencil lettering is oriented in relation to grain direction? Please see the attached photo, where all the smaller sheets have a constant W width, and vary in the L length...

Thank you for the feedback. Yes, I'd likely overthink it, but I suppose that's what we all do...and why these forums are so nice to have an on-line peer review. But I came here for answers and I got them. I guess it comes down to the classifying bodies calling essentially the same material...

Here's the compositions I found: A36 Carbon, C <= 0.25 % Copper, Cu 0.20 % Iron, Fe 98 % As Remainder Manganese, Mn 1.03 % Phosphorous, P <= 0.040 % Silicon, Si 0.28 % Sulfur, S <= 0.050 % 1018 Carbon, C 0.14 - 0.20 % Iron, Fe 98.81 - 99.26 % As remainder...

Would there be a difference in hardening response to nitride case-hardening C-1018 versus A36? C1018 has a carbon range of .14-.18% whereas A36 is < .25%. Thanks...

You should look at the steel suppliers websites and look for hardenability curves and such. https://files.engineering.com/getfile.aspx?folder=9ec352c7-e75a-4f0d-b1e8-e87cd6900d49&file=a1.png

And I stand by my statements. Investigate the problem and hypothesize. Anticipate needs. Samples being evaluated by a lab. Samples be sorted by apparent differences. Short and long term solutions developed. Hypothesis verified. Short and long term solutions implemented. There are 6 or 7...

I think this is a great example of trying to fix the problem before you understand what is wrong. Be interested to find out the result of the metallurgical examination. I never said I was trying to fix. I said I was trying to sort.

Thanks all for the replies. You've given me some things to look into. Have you had the case depth measured on one of the cracked parts to see what the case depth is? It doesn't really help being able to sort if that is not the root cause of the problem. We are having this done as I write, but...