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Recent content by Cup909

  1. C

    Connecting Skids Together

    I work in a manufacturing facility and we're mounting a robot to a semi-moveable skid so it can be moved as needed. The goal being that the robot can be moved & reconfigured to do different tasks as needed without needing to rip up concrete, etc. The skid is pretty straightforward, C channel...
  2. C

    Help finding a heat resistant, non-conductive, and pressure tolerant material

    Cheap and readily available - https://www.amazon.com/J-B-Weld-Temperature-Resistant-Metallic/dp/B07JJ3GPFG?source=ps-sl-shoppingads-lpcontext&ref_=fplfs&psc=1&smid=A2XZEZ32XAXM4A&gQT=0 Less cheap https://www.mcmaster.com/products/high-temperature-epoxies/
  3. C

    718 Roll Thread Lap Forming

    Precipitation hardening doesn't impact grain flow/refinement.** The grain flow would be lost during solution heat treatment. AS7478 actually prefers rolling before precipitation hardening. ** assuming you're not doing a silly heat treatment.
  4. C

    718 Roll Thread Lap Forming

    The machine is setup with built in end play to allow for the dies to move in forward/aft movement.. Internally the spindles are on a spring and the machine rests at a '0'. The spring is stretched/compressed to give the dies ab it of forward/aft movement. The dies themselves are keyed to the...
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    718 Roll Thread Lap Forming

    We're working on a project to roll thread some solution annealed 718 and have run into issues with lap formation. The parts are roll threaded in an infeed setup using a 2-die roller machine (setup picture below.) The dies are 6" long and close in on a 5" machined blank with chamfered ends. After...
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    Total Runout - Long Shaft

    You're completely right on the W calculation. It wasn't setup as a formula! (Value matched actual part, not the 1" rod we're discussing.) Corrected it and my value matches yours. See below. Thanks for the catch. Customer is the final customer, who initiated the contract to our company. There's...
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    Total Runout - Long Shaft

    I checked for any callout of restrained condition. Nothing like that in the general specification. Absent any sort of general specification, my interpretation is that it should be in the unconstrained condition. The customer explained that the runout condition is being controlled for...
  8. C

    Total Runout - Long Shaft

    This is an engineering drawing requirement. Turbine shaft, should be familiar to you. I didn't post the actual drawing/snippet for obvious reasons. I'm a supplier of the shaft. I just reviewed the drawing and there isn't a callout for restraint condition or equivalent. They do have a general...
  9. C

    Total Runout - Long Shaft

    I've seen varying CMM machines for hanging & measuring crankshafts, but most top out around 4-5'. Technically would work in my example, but the parts we're working on are turbine shafts at 9ft. At least I haven't seen one with the capability. Hanging and taking the vertical measurements would...
  10. C

    Total Runout - Long Shaft

    The deflection I calculate (screenshot below) for a 1" round, 5ft long at 54" datums (3" from either end), is a deflection of 0.147", so a significant amount and well out of tolerance to just ignore. That will be lessened slightly by the 3" cantilever on either end, but not near enough to...
  11. C

    Total Runout - Long Shaft

    I'm looking to measure the total runout of a very long shaft along the entire length. A 1" diameter shaft, 5' long, with datums 3" from each end, and a total runout requirement of .005". The traditional method would be to put the datums on Vee-blocks and roll it then drag the dial indicator up...
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