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  • 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
  • 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
  • Xrd Residual Stress Measurements On Alloy 600 Pressurizer Heater Sleeve Mockups (.pdf)
    Alloy 600 penetrations in several pressurized water. reactors have experienced primary water stress. corrosion cracking near the partial penetration Jwelds. between the Alloy 600 and the cladding on the. inside diameter of the components. The. microstructure and tensile properties indicated
  • 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
  • New developments on the turbine-power front
    Alternative energy is in the headlines thanks to recent efforts to generate electricity from the tides and wind. Inventor Doug Selsam's turbine produces power in 9-mph winds and puts out an average 1 kW at 25 mph (24-V nominal). Marine Current Turbines place two generating units on an arm that can
  • Weighing the advantages of tubing versus pipe
    potential leak points and lower costs. Tubing is readily available in diameters up to 2 in. with a variety of wall thicknesses and materials to meet the toughest application demands. It's important to note that tubing and pipe are sized differently. A 1-in. pipe, for instance, has a 1-in. nominal
    in diameters up to 2 in. with a variety of wall thicknesses and materials to meet the toughest application demands. It's important to note that tubing and pipe are sized differently. A 1-in. pipe, for instance, has a 1-in. nominal bore, while a 1-in. tube has a nominal outside diameter of 1 in. Another
  • Tension Testing of Metallic Materials (ASTM E8)
    and a nominal thickness of 3/16 inch or more. Sheet rectangular specimens have a reduced area section of 1/2 inch and their thickness should not exceed 3/4 inch. Subsize specimens with a 1/4-inch width can be used for material thicknesses up to 1/4 inch. When the material has a thickness of a 1/2 inch or more
  • How linear FEA helps in fatigue analysis
    A few guidelines show how to correctly use FEA stresses to find reasonable margins of safety. In a simple case, a 1-in.-diameter bar (0.8-in. diameter at the groove) of 4340 steel has = 160 ksi and a 10,000-lb load in tension. Groove radius is 0.1 in. FEA reports a maximum tensile stress of 43.88
  • Laser Drilling Tablets for Use in Osmotic and Other Novel Drug Delivery Systems
    . The tolerances on hole diameter and shape are usually relatively loose, at least by the standards of other precision manufacturing tasks. A nominal 600 um hole usually has a +-100 um tolerance on diameter, and an allowable ellipticity of 1.0 to 1.5. Holes of these dimensions and tolerances could
  • Captive Nuts
    the sheet metal to become self-retaining. Lobed types have a smooth sinusoidal lobe shape with a radius greater than 5% of the nut's nominal thread diameter. Such lobes meet the requirements of MS33588, and do not create stress risers in the parent material. Lobed nuts are available in standard
  • Shoulder-Fillet Stress Calculations Clarified
    of stress-concentration factors (SCFs) , are computed as though a smooth, round bar of diameter is loaded in bending, tension, or torsion. Under conditions like bending only or tension only, the nominal stress state is uniaxial, " says Tipton. However, when a notch is present, a bar loaded only