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Home » Keywords » surface roughness

Items Tagged with 'surface roughness'

ARTICLES

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Mitutoyo Releases RTX Roundtracer Extreme

April 12, 2022

Mitutoyo America Corporation has released the RTX Roundtracer Extreme all-in-one measuring system that integrates roundness, contour and surface roughness measurement functions on a single platform to save time and improve productivity.


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Mitutoyo Presents CMMs and Vision Systems at MD&M West

February 23, 2022

Complete Measurement of Gearbox Components

July 1, 2018
In today's production environment, a variety of different measurement devices is used to assess the quality and accuracy of workpieces. These devices include CMMs, gear checkers, form testers, roughness testers, and more. It requires a high machine investment and a high handling effort - especially if a full end-of-line measurement is needed. One approach to reduce quality costs is to include all measurements in one single machine that is suitable and robust enough for use in production.
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Friction Coefficient of Differently Treated Steel Surfaces

November 1, 2017
A reader asks about ion-nitride finished shafts and the proper friction coefficient to be used for calculations.
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Gear Tooth Surface Roughness of Helical Gears Manufactured by a Form Milling Cutter

September 1, 2015
Manufacturing involute gears using form grinding or form milling wheels are beneficial to hobs in some special cases, such as small scale production and, the obvious, manufacture of internal gears. To manufacture involute gears correctly the form wheel must be purpose-designed, and in this paper the geometry of the form wheel is determined through inverse calculation. A mathematical model is presented where it is possible to determine the machined gear tooth surface in three dimensions, manufactured by this tool, taking the finite number of cutting edges into account. The model is validated by comparing calculated results with the observed results of a gear manufactured by an indexable insert milling cutter.
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Micropitting of Big Gearboxes: Influence of Flank Modification and Surface Roughness

May 1, 2011
Most research on micropitting is done on small-sized gears. This article examines whether those results are also applicable to larger gears.
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Influence of Surface Roughness on Gear Pitting Behavior

May 1, 2006
In earlier studies, surface roughness has been shown to have a significant influence on gear pitting life. This paper discusses how high surface roughness introduces a wear mechanism that delays the formation of pits. Accompanied by a full-page technical review.
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Obtaining Meaningful Surface Roughness Measurements on Gear Teeth

July 1, 1997
Surface roughness measuring of gear teeth can be a very frustrating experience. Measuring results often do not correlate with any functional characteristic, and many users think that they need not bother measuring surface roughness, since the teeth are burnished in operation. They mistakenly believe that the roughness disappears in a short amount of time. This is a myth! The surface indeed is shiny, but it still has considerable roughness. In fact, tests indicate that burnishing only reduces the initial roughness by approximately 25%.
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Basic Honing & Advanced Free-Form Honing

July 1, 1997
Rotary gear honing is a crossed-axis, fine, hard finishing process that uses pressure and abrasive honing tools to remove material along the tooth flanks in order to improve the surface finish (.1-.3 um or 4-12u"Ra), to remove nicks and burrs and to change or correct the tooth geometry. Ultimately, the end results are quieter, stronger and longer lasting gears.
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Gear Tip Chamfer and Gear Noise; Surface Measurement of Spiral Bevel Gear Teeth

July 1, 1993
Could the tip chamfer that manufacturing people usually use on the tips of gear teeth be the cause of vibration in the gear set? The set in question is spur, of 2.25 DP, with 20 degrees pressure angle. The pinion has 14 teeth and the mating gear, 63 teeth. The pinion turns at 535 rpm maximum. Could a chamfer a little over 1/64" cause a vibration problem?
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