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  • Users: TheReg
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  1. TheReg

    Dimension Stability from thermal expansion

    First thanks for any help.. We are using a bar of 2024-T3, approx 1-1/4" x 1-1/8" x 9" with male and female lug profiles, one per each side for mating parts. Male width is .770 and slot depth is .231 and the female profile width is .780 and profile extrusion is .233 which should give a .010...
  2. TheReg

    Multi-Head Riveter

    I am looking for a company that can supply a multi-head riveter. We are using 1/8 rivets and placing them on 1-inch centers, from a minimum of 6 to a maximum of 12 rivets. We would like to have a toggle switch to select which rivet would be applied. Needless to say, I dont know if this is...
  3. TheReg

    Strengthening Sheetmetal

    I am using 26ga. sheetmetal (9-3/4 wide) with two tabs welded (for self tapping screws), however, the the srews are torqued the sheetmetal bends. Will placing a groove across the width of the metal (over the top of this section) provide enough strength to overcome the screw torque? Can anyone...
  4. TheReg

    part mating sequence/coding

    What is the best method for determining a part mating sequence. Such as, (ie..)48 different, or final, parts use a combination of 3 components, which could be interchanged to produce wrong parts. Would like to use mating pins and cleanace holes. Is there an easy method for determining the...
  5. TheReg

    Part mating - Coding

    Waht is the best method for determining a part mating sequence. Such as, (ie..)48 different, or final, parts use a combination of 3 components, which could be interchanged to produce wrong parts. Would like to use mating pins and cleanace holes. Is there an easy method for determining the...
  6. TheReg

    bolts/screws in shear

    Question: I need some help finding the shearing stress of screws holding a shaft to a drum. T = 6724.08 (lb in.) Number of bolts = 6 Bolt Size = 5/16-18 X 1-1/2" Plate thickness = .750 Bolt Circle = 2-7/8" I know I can increase the size of the screws to 1/2" dia w/close fit...
  7. TheReg

    Inertia of rotating drum vs. Braking requirements

    First, I havent done these calcuations since school. I have a drum, which weighs 400lbs (24"Dia. x 12"W) supported by two stub shafts (1.688"Dia. x 12") rotating at 1750 rpm. I am trying to determine the intertia of the drum, so I can determine the torque required to stop...
  8. TheReg

    CFM to ft/min conversion

    I need some help find a nice conversion from 680 CFM @ 5" static pressure to ft/min.

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