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  • Case Study: Subsurface Defect Analysis of Small Diameter Copper Rod
    Two samples of solid copper rod of approximately .30" diameter were tested in a 3 wavelength (N: 3) resonance mode EMAT (RM-EMAT). Transducer ID was .410" nominal. One of the samples has had a .040" hole end drilled approximately 1.25" deep. This sample was tested on an ARIS lab unit hand fed
  • Semipermanent Pins
    . The two basic types of semipermanent pins are machine pins and radial-locking pins. Machine pins are separated into four categories: dowel, taper, clevis, and cotter. are standardized in nominal diameters ranging from 1/16 to 7/8 in. Standard pins are 0.0002 in. oversize on the nominal diameter
  • Fittings: Tapered Pipe Fittings
    Nominal pipe sizes do not match the outside or inside thread diameter. To determine pipe sizes up to 1¼", measure the outside diameter of the threads. Subtract ¼" for the pipe thread size. (example, a fitting measures ¾" at the large end, then subtract ¼", the fitting in question is a ½" pipe
  • Understanding Tolerance Stack-up
    Tolerance stack-up is an especially important factor in microminiature O-rings due to the fact that the tolerances account for a large percentage of the nominal O-ring size. In a sealing application, the tolerances of all the parts in contact with the O-ring must be considered in order to create
  • Why Rubber Tubing Tolerances may be Different than Plastic/Rigid Tubing Tolerances
    as a "plus" or "minus" which means the nominal dimension can vary within the "plus or minus" range. For instance, if the manufacturing tolerance on an Inside Diameter of rubber tubing is: 0.250 ID +/- .010, the actual Inside Diameter of the tubing can range from 0.240 to 0.260 and still
  • Tubular Rivets
    in. is by far the most popular nominal shank diameter. A 0.125-in. carbon-steel rivet can cost less than rivets with shank diameters from 0.085 to 0.089 in. Unless limited by load requirements, the 0.125-in. rivet should be used. Inventory can be reduced if one rivet with a large grip range is used
  • Case Study: Multiple Analysis of Welded Steel Tube
    Three types of welded steel tubing samples were presented for evaluation of metallurgical conditions including: 1) Cold weld. 2) Galfan coating integrity. 3) Holes. 4) Differences in I.D. bead height. Three samples of .373" OD Galfan coated tube with a .043" nominal wall thickness were tested
  • Medical Device Link .
    atm and rated burst pressures in the range of 12 -20 atm. Multiple deployments may be necessary, so balloon fatigue is also a factor. Finally, to prevent damage to vessel walls caused by overinflation, balloons must have reliable diameters along the length of the balloon at nominal pressure
  • Pipe and Tubing
    costs less than tubing, and is normally used where: Outside pipe diameter conforms to the corresponding series for pipe threads. Therefore, the outside diameter of each nominal size remains constant regardless of wall thickness. Today, the range of wall thicknesses available provides an equivalent
  • Understanding Cold Cathode Fluorescent Lamps (CCFL'S)
    white light providing a backlight, with the capability of a full spectrum of color filtered out and displayed. In addition to back lighting, CCFL's provide visible and ultraviolet energy for scanning and detection applications in portable devices. Lamp size (diameter and length) substantially