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  1. Rentapen

    O/H Sign failures at baseplate

    Most base plates and columns/poles are full penetration (small hole for wires and water) or slip fit (stronger-double fillet) but both are usualy rose bud heated to make a better weld. But to change the material to a brittle condition I would suspect over spec'ng the material/rod or the fab shop...
  2. Rentapen

    shop drawings

    All dwg's, layouts and details, must be approved by a PE or AIA. Fab shops most time do structural detail and fabrication from contractors, always late with dwg's and loads of revisions, and don't employ AIA's or PE's because of cost. We build what you DESIGN and APPROVE no matter how goofy it...
  3. Rentapen

    US Customary vs. metric units

    Rentapen (mechanical) Rentapen (product designer) Rentapen (floor sweeper) Until all the machine shops and factories in the USA start using new machine tools with metric readouts etc. the USA will use inch. I can not design a special machine or product that will be made in the USA with pre 70's...
  4. Rentapen

    Non-Instance 3D part to Instance 3D part

    I had to change a few parts of an assembly. I exploded one detail to lose the instance and browser callout. I altered the 3D part and want to add instance & callout again. Is there a easy way or do I have to draw the new details long hand. thanks rentapen carl
  5. Rentapen

    MDT4 Copy & Break Link

    Has anyone figured a quick and easy "Copy and break Instance". I read where someone had a work-around but he didn't post it. regards rent-a-pencil
  6. Rentapen

    Instance Link Break

    Playing with MDT4, has anyone found a quick workaround to editing a instance copy? I saw someone had a ideal but it wasn't posted.
  7. Rentapen

    Default Tolerances in Title Block

    Think of the shop people. Any fraction must be read from a yo-yo (tape measure), I believe 1/16 is the smallest with better one's marked out at 1/32. Just wandering. rentapen
  8. Rentapen

    OK, Here is the "Burning" question..

    In our medium size tool, die, and special machine design house autocad 2d is the only way to cost effectivly be competitive. Since jobs shops are mostly all one-offs taking the time to make a 3d assembly does not make much sense. We do use customers sw and others models for our cnc smartcam and...
  9. Rentapen

    Old Inertia Papers New Design

    Need quick help or direction by morning (10:30 pm now) I'am now rent-a-penciling a new job using a old design. Large mold timing (22 ft dia) having 20 molds weight unknown at this time (this is old design). All this should be of no concern to you since I don't have a print (other then one...
  10. Rentapen

    Electro-Static,-Magnetic,-Mechanical punch press?

    Greetings and thanks! After searching on "Bump forming", interesting and useful, I searched on electromagnetic press and found my query. I now seem to remember years ago about a solenoid type press and low and behold this is it. Its based under "Winset Tech" which markets the...
  11. Rentapen

    Electro-Static,-Magnetic,-Mechanical punch press?

    To tell you the truth I won't know till monday, I took this weekend off and I'am not going back to look at that little piece of paper. OK I seem to remember this was for delpi mi so I would think. 1/2 dia ss some length. But I actually remember reading something else about a 2mm dimple and a...
  12. Rentapen

    Electro-Static,-Magnetic,-Mechanical punch press?

    Greetings, The boss is quoting a job and the request is to price out a standard punch (1.2mm hole pierce) press and the "Lordes (lores?) electrostatic press" . Now I've been structural, mechanical, industrial, and plant engineering but I can't fine a electrostatic press unless he...
  13. Rentapen

    Tolerance Stacking Using The RMS method?

    JL As a ref for spc-deming uninitiated, this links about the basic I can find. Although Deming mentioned it he never really incorperated into his system. If I remember right it was hold "Close, High, and Tight, and Everythings right" or something like that...
  14. Rentapen

    INSPECTION DIMENSION Standard

    roby, For MOST small to medium mfg'ers a number circled or star with a note is used. A majority out there ARE small to medium with a assembly consisting of only a few parts swaged, welded, pressed, or bolted together. They have no need of expansive cad systems or more then one assembly dash...
  15. Rentapen

    Downtime Calculation?

    uppili11, I just reviewed a tack-spot weld company in Blissfield Mich. do does work for all the Big Ums, they just patented a quick change weld process. You buy one large stationary machine (beer cooler size) then you buy a bunch of smaller forklift loaded pallets (large tv box size) with your...
  16. Rentapen

    Counter bore depths

    Wraith, Nothin' gets under a tool, diemakers or assembliers skin then someone who cuts a c'bore to a screw diameters depth. Besides the tolerance of cap heigth, wear on the pilot-c'bore step drill outside radius, sprung lock washers or plain washers, and chips in the hole, when they assemble...
  17. Rentapen

    Downtime Calculation?

    SteveMeisel, On your pallet race track line, do you have the old style bolt to the floor type stations or the newer on rollers bolt together station pallet race track (management loves the new lines, ask Flint Mich., you can pull a whole line in one weekend and move to a different location)...
  18. Rentapen

    Angle Gage On Line

    Where can I find "on-line" the gage dim. for my clip angles. Yes I have them on my "SS" cad detailing program (to lazy to transfer to paper but I will)and no I don't have steel construction or detailing book at home at my fingertips. I made a nice chart years ago but left it...
  19. Rentapen

    How to design a 20" Dia. Bearing 2,000 RPM

    Get off your chair and look at the lazy suzi style bearing most office chairs have. You can change that many ways. Delrin ball stamp steel race and track. Delrin/plastic race/track steel balls. Dove tail jibs and runs. Spoked inners or flange/clamped to whatever mounted. Air/fluid bearing after...
  20. Rentapen

    In-house Design Reviews & Quality Assurance

    Sending a design out to have a stamp from someone outside is a fact of life for most small to medium fabrication firms. We do silos and cement plant steel welding as 75 percent of our business maybe ten large jobs a year using lots of recycled designs but each new one must be stamped. why would...

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