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  • Speed Reducers and Gear Trains
    Gear trains and speed reducers are mechanical components often used for obtaining a desired angular velocity of an output shaft, while the input shaft rotates at a different angular velocity. The angular-velocity ratio between input and output members must usually remain constant. The value
  • Fundamentals of Metric Gear Trains
    Crowning is the removal of a slight amount of tooth from the center on out to reach edge, making the tooth surface slightly convex. This method allows the gear to maintain contact in the central region of the tooth and permits avoidance of edge contact with consequent lower load capacity.
  • PT 102: Low Frequency Vibration Measurements on a Compressor Gear Set
    The gear set on a critical turbo-compressor was monitored with a standard industrial accelerometer at very low frequencies. Severe vibrations at the hunting tooth frequency were found to be amplified by a compressor surge modulation. Diagnostic evaluation and repair effectively eliminated the surge
  • The Principles of Harmonic Drive TM Gearing
    The advantages of Harmonic Drive TM strain wave gear over other, more conventional gear trains are apparent. A simple three element construction combined with the unique principle of Harmonic Drive TM strain wave gear puts extremely high reduction ratio capabilities into a very compact
  • Fundamentals of Helical Gears
    In Figure 5-2 the gear train has a difference of numbers of teeth of only 1; z1 = 30 and z2 = 31. This results in a reduction ratio of 1/30. SECTION 6 HELICAL GEARS. The helical gear differs from the spur gear in that its teeth are twisted along a helical path in the axial direction. It resembles
  • Definite and Special-Purpose Motors
    , and brush-type motors have large starting torques. Applications with high inertias should be analyzed by the gearmotor manufacturer. This problem is critical with self-locking right-angle gearmotors. Since rotor and load are rigidly connected by the gear train, both must stop in the same time. In severe
  • Barely scratching the engineered surface
    of component surfaces at the micron scale. Doing so can improve wear, fatigue, and frictional performance of bearings, hydrostatics, engine components, and gear trains. For example, engineering the surfaces of transmission gear teeth can extend life about threefold. Engineered Surfaces include
  • Frosty reception for unprepared robots
    deploying automation in freezers. For one thing, gear trains that target these temperatures need different tolerances, clearances, and in some cases different materials. Integrators should also plan on dry low-temperature lubricants so viscosity isn't a problem. Similarly, low-temperature seals

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