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Increasing Rolling Contact In Linear Guides
conformity. There is a trade-off, however, between scuffing and pure rolling. During elliptical contact, the ball purely rolls only at the center of the ellipse while scuffing occurs along the major axis of the ellipse. The following equation is used to calculate the degree of conformity: Based
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Recognizing gear failures
failure modes: bending fatigue, pitting, micropitting, scuffing, and wear. failure is the result of cyclic bending stress at the tooth root. Stress comes from a variable-lever-arm load that moves along the tooth profile during mesh. The damage process follows three stages: crack nucleation, crack
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Barely scratching the engineered surface
. Baseline gears are ground with in. Technicians boosted torque in steps until they saw scuffing. Treated gears handled up to 70% more torque than untreated. A topographical-modified surface compared to a standard ground surface. Engineered surfaces are flatter and less directional than ground surfaces
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The Bonded-On Bearing
. Incompressible in block or sphere forms, fibers exhibit columnlike behavior under load and will shear or fracture, protecting the soft binder from erosion and scuffing. This barrier under load lets the new coating wear better by an order of magnitude over PTFE and moly-filled coatings. The bonded surfaces
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Fighting friction with solid-film coatings
Low-friction coatings for bearings can improve bearing life and performance. Edited by Jean M. Hoffman Scuffing on bearing/wear surfaces, such as on the lobes of this rotor, is reduced or eliminated by the use of a low-friction coating. The bearing area of a knee brace is coated at the hinge
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Flexographic Glossary of Terms
and scuffing. Also called scuff or rub resistance. Abrasion Test. A test designed to determine the ability to withstand the effects of rubbing or scuffing. Adhesion. The state in which two surfaces are held together by interfacial forces; measure of the strength with which one material sticks to another
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Lubrication Technologies - A Whitepaper (.pdf)
. away by sliding. EP-fortified oil films can support a much greater load and offer greater resistance to scuffing than AW or. inhibited oils. This greater resistance to scuffing may cause certain friction-dependant devices such as backstops to slip. EP. additives are also chemically aggressive
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Pressure-Energized Seals
for a slightly modified shape. Claimed advantage of the collar shape includes improved resistance to wear and scuffing. Want to use this article? Click here for options!. (C) 2011 Penton Media Inc. Email this page. Printer-friendly version. Delicious. Digg. StumbleUpon. Reddit. Magnoliacom. Newsvine. Furl