Machinery Lubrication magazine published by Noria Corporation
Issue link: https://www.e-digitaleditions.com/i/190260
Platelet-shaped Particles These two-dimensional particles are generally flat with a rough perimeter. Their thickness typically is about one-tenth to one-thirtieth their lateral dimension. They can be further described as having either a laminar or wedge shape. One of the most common ways platelet-shaped particles can occur is by normal and tangential forces through contacting asperities. Spherical Particles As their name implies, these particles are fundamentally spherical. Normally less than 10 microns, they appear in small numbers and are sometimes fused together. As wear debris, spherical particles have been associated with rollingelement bearings and are often a precursor to fatigue failure. It must be noted that spherical particles are frequently found as contaminants rather than as wear debris. This type of spherical-shaped contaminant likely will be larger than 10 microns and often is a byproduct of welding and grinding processes. Wire or Curl-shaped Particles Typically long and skinny, these particles may resemble a wire, splinter or ribbon shape. While they can have smooth sides and edges, they normally will have a rougher appearance. Another common characteristic is how they are curled, which is similar to a shaving curl in a woodplaning process. For this reason, the particle may be rough on one side and smooth on the other. These types of particles have been linked to cutting wear where one of the contacting surfaces possesses an asperity or lodged particle that is plastically rigid compared to the other surface from which the ribbon-shaped particle is gouged out. Chunks or Irregular Particles The adhesion theory offers a possible explanation for why INTRODUCING OUR NEW CXL2 INJECTOR Possibly the only grease-oil metering device you'll ever need! © 2013 BIJUR DELIMON INTERNATIONAL. ALL RIGHTS RESERVED. FEATURES & BENEFITS • TamperResistantDesign • PrecisionMetering • CorrosionResistantProtection • Zinc-NickelPlating • 1000HourSaltSpray • StainlessSteelIndicators • Inch/MetricPorting&Outlets • FlexibleDesignConfigurations • 0.05ccm~0.40ccmDischarge • -30°C~+70°COperation • ForMediumOilsto#2Grease • EasytoUnderstand,Install&Service Industrial Applications DIRECT SALES HOTLINE (+1) 800-631-0168 WindTurbines UnITED STATES MobileEquipment MachineTool Packaging &Filling Robotic AssemblyCells FoodProcessing &Bottling CHINA FRANCE GERMANy UNITEDKINGDOM IRElAND|INDIA|SPAIN|RUSSIA | | | | CORPORATE HEADQUARTERS2250PERIMETERPARKDR.,SUITE120,MORRISVIllE,NC27560 www.machinerylubrication.com SALES@BIJURDELIMON.COM | September - October 2013 | 43