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  • bdeuell's Avatar
    Today, 04:08
    My main concern would be the thread strength in the aluminum part. I would use a coarse pitch fastener as they are less likely to strip out. With the exception of thin wall materials where you can not get at least a couple full threads without using a fine pitch fastener but I would try to avoid this case. Edit: I assumed you were threading into the aluminum ...not sure if that is actually the case. Fine pitch fasteners have a higher tensile strength so the strongest fastener depends on your design.
    2 replies | 217 view(s)
  • AceEngineer's Avatar
    Yesterday, 19:16
    Mathcad is a very useful tool for any type of engineer that does design work. Learn it, if at all possible. It is especially useful for simulations and control algorithms. I also used it like a desk calculator for repetitive calculations. AceEngineer
    5 replies | 572 view(s)
  • AceEngineer's Avatar
    Yesterday, 19:09
    MS Office Picture Manager will resize images. On the right, click edit and then resize. You can also use PowerPoint. I always scan at the upper limit of my scanner so I have some resolution to give away during resizing. AceEngineer
    3 replies | 165 view(s)
  • srdfmc's Avatar
    Yesterday, 18:30
    Your are absolutely spot on. And this is truly Sad. But ppl shld not make the confusion btw Engineer and Designer/CAD Modeler. You don't expect the same from both. In my view, there is no way that you can see an Engineer without any solid programing skills. That it have to be with an analytical software like MathLab/Mathcad or via C++ or even VBasic. But I have been programming routines countless of time in my career. More than often did it put myself in a really weird situation regarding some kind of animosity with some colleague or a project leader.
    5 replies | 572 view(s)
  • srdfmc's Avatar
    Yesterday, 18:15
    OF course. FEA is never a necessity. It just help to lean your design faster when you go through several configuration... Which, as I understand Rambo3504 question, seems well to be the case. ;)
    4 replies | 223 view(s)
  • KevinC's Avatar
    Yesterday, 17:45
    Hey guys: I'm looking into purchasing stainless steel bearings (Roller and/or Ball Bearing), Spherical or not. I have a hard time finding a good vendor that sells good variety of stainless steel bearings. We use Bore sizes from 3/8" - 3" Diameter. I know it's easy to find steel bearings, but when it comes to stainless steel bearings, I find it tough to find vendors. Where do you recommand me to take a look of stainless steel bearings besides SKF ( I know the common bearing companies that have steel bearings, but what about stainless steel bearings)? How about stainless steel Rod Ends? Kevin
    0 replies | 24 view(s)
  • KevinC's Avatar
    Yesterday, 17:13
    Did you find a solution? I'm actually interested in the solution.
    1 replies | 471 view(s)
  • KevinC's Avatar
    Yesterday, 17:12
    Hey, you probably are not interested in an answer now, but here is a quick answer. Strength-wise: fine pitch is better. But try to use coarse pitch unless it's really needed. On a side note, since aluminum is a soft material in comparision to the screw/bolt, use a washer.
    2 replies | 217 view(s)
  • KevinC's Avatar
    Yesterday, 16:08
    I would be surprised if I see a Mechanical Engineer department in a company have more than 5% of engineers that would be able to use Matlab (in general). Maybe be more in a R&D company or in a very theory based and calculation intensive company. When you are trying to put Matlab (programming) into a job, most likely you are trying to be innovative, or the company itself has been using an existing Matlab program. I'm a fluent Matlab user, but I haven't seen a single project/job in my ME career or my colleage's in using it. Nevertheless, it's a good program to know how to use.
    5 replies | 572 view(s)
  • KevinC's Avatar
    Yesterday, 15:57
    Your initial market would be small. But hope you'll do well in a long run. My suggestion: 1) At least have 5-6 catridge available, as this is a product for the people who are just living with drugs/pills daily, and I know many of them takes pills and pills a day, so having a 5-6 catridge of pills are essential. 2) This thing doesn't look good, have a modification in the design, or else you won't be able to get a good market.
    19 replies | 1090 view(s)
  • KevinC's Avatar
    Yesterday, 15:10
    If it doesn't get to much cyclic loading (reversal loading), then just do static calculation would be good. Other wise, unless your loading statically is higher than your dynamic loading, you should do fatigue analysis.
    10 replies | 3507 view(s)
  • KevinC's Avatar
    Yesterday, 14:51
    Design Engineer majorly, but there are also people who will use it without being an engineer.
    1 replies | 1239 view(s)
  • PierArg's Avatar
    Yesterday, 06:57
    Hello vysang and welcome to the forum, if the shaft rotates it is subject to fatigue loads even if the load appears static...unless it is loaded in the axial direction (but this would be discordant with the real function of a shaft).
    10 replies | 3507 view(s)
  • PierArg's Avatar
    Yesterday, 06:42
    I think the FEA simulation is not necessary. :) It is suffice a white paper sheet, a pen and the levers theory
    4 replies | 223 view(s)
  • srdfmc's Avatar
    Yesterday, 06:20
    A Numerical simulation (FEA) will do it quickly and repeatedly with enduring accuracy during the design phase. ;)
    4 replies | 223 view(s)
  • armored cortex's Avatar
    23rd Oct '14, 21:30
    Hello, I thought I'd share some progress on a mini gun model that I have been working on for the past few weeks. The purpose of this project is to practice my modeling skills and to have another project for my portfolio. I have never worked as an engineer before but with enough practice I hope to land a job or an apprenticeship soon.
    0 replies | 118 view(s)
  • K.I.S.S.'s Avatar
    23rd Oct '14, 17:12
    If you read the original posters comment, he mentions that he is 'building a prototype' - a prototype is a working physical model.... He only later mentions the CAD models. And you'd be surprised - if you're a 'person of interest' to the security agencies of some countries, there might well be a law against it...
    5 replies | 228 view(s)
  • KevinC's Avatar
    23rd Oct '14, 08:43
    KevinC replied to a thread Force calculation in Calculations
    You can just use individual component and do a Free Body Diagram to solve for the shear force by the cutter. Disregard the momentum side as I don't think this is using impact force to cut the rod.
    1 replies | 101 view(s)
  • micha's Avatar
    23rd Oct '14, 07:42
    Thanks for thee reply. I dont have any software like illustrator so I guess I just have to go with what Ive got. It looks fine on my computer screen so fingers crossed it will look ok printed. The printing place wants 300 dpi files so I guess thats the resolution I should scan the files as? Its here> print24
    3 replies | 165 view(s)
  • KevinC's Avatar
    23rd Oct '14, 03:07
    Sorry, I know this is a really old thread, but, anyone found the answer to this question? I know the .808(bh)^.5 is for solid rectangular section for sure, but let's say I have a hollow section, what should I do in this case for Marin Factor.
    3 replies | 2227 view(s)
  • SHRJOBS's Avatar
    22nd Oct '14, 16:30
    Career Opportunity: Project Manager with Fameccanica North America in Cincinnati (West Chester), OH Are you a Project Management Leader with a proven record of managing complex projects? Do you have success with developing project plans that support business objectives? Would you like to join a fast-paced, quickly growing company and take your skills global? Fameccanica North America is growing! We are seeking a full-time Project Manager to join us in our Cincinnati / West Chester, OH location. We are the worlds leading equipment supplier for the hygienic disposables industry, designing and manufacturing high performance production equipment since 1975. We design machines used by major consumer goods companies for the production of disposable products such as diapers, sanitary napkins, detergent packing, and paper processing. As we are growing, we recognize the need to continue to provide strong operations support for both our business and our employees. Whats In It...
    0 replies | 84 view(s)
  • morrison's Avatar
    21st Oct '14, 23:06
    You will not usually get good results with increasing image size, it will get pixelated and blurry. You could try tracing the line illustrations with Illustrator but the results will not be very good. You could also just try scanning with the highest settings, for example 600 dpi or what ever your printer supports.
    3 replies | 165 view(s)
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