TKD Precision Balls - Corsairsarl.com

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PLASTIC BALLSPlastic balls are produced using standard and special polymerresins with diameters from 1.50 to 150 mm. and they can beused instead of stainless steel or steel balls in various industrialapplications at lower cost than metal balls.Plastic balls offer above all the advantage of being very light,since their specific weight is very low. They are also highlyresistant to heat and they provide smooth and silent running,totally noise and friction free. Unlike conventional metal ballsthey do not require lubrication.Another important feature is their excellent resistance tooxidation and abrasion and, therefore the use of these balls,even in very corrosive environments, allows long life of thecomponent concerned. They also provide electrical and heatinsulation and are not magnetic. The most suitable type ofsynthetic material can be chosen from a wide range of plasticseach with different characteristics.The most common applications include plastic bearingsand rollers, ball bearings for furniture, micro-pumps forsprays, dispensers, pumps and valves, precision instruments,measurement and control equipment, photographic andpharmaceutical equipment, computers, conditioning andautomation equipment, photocopiers and equipment for theindustry.NYLON (PA)Insoluble in common solvents, alcalis, diluted mineral acids and organicacid substances. It is, above all, resistant to alcalis, oils and petroleumgreases at temperatures up to 150 °C, inorganic saline solutions, aromatichydrocarbons, low strength alcohols, gasoline. It has high strength, rigidityand hardness characteristics.DELRIN (ACETAL RESIN - POM)Polymer resin with excellent mechanical and chemical resistance andgood electrical properties. Resistant to inorganic saline solutions,aliphatic, aromatic and chlorinated hydrocarbons, low strength alcohols,ether, combustible mixtures, mineral oils and greases. Balls made ofthese materials are often used for sliding fittings of tables and drawers,furniture bearings, rollers, valves and electronic components, sailing boatfittings.POLYPROPYLENE (PP)Excellent chemical resistance, low specific weight (less than water) andthe highest melting point of thermoplastics. It is an excellent electricalinsulator and has a low dielectric constant coefficient. It is often usedwhere the capacity to float on fluids in general is required. It is ideal forequipment used for blood transfusions, level indicators and deodorantroll-on sticks. It is highly resistant to chemical substances, such asacids, alcalis, alcohols and many inorganic substances, saline solutions,solvents, alcohols, gasoline (petrol), water, oils, greases, detergent, fruitjuices and milk. It is not resistant to aromatic hydrocarbons and chlorates.It is perfect for all medical and pharmaceutical applications.On request, we can supply further materials of plastic balls and glass fibres filled balls.SpecificationSpecificgravityHardnessSHORENormalconditionMax tempresitance ºCWaterabsorptionColdresistanceColourCharacteristicsNYLON (PA) 1.13 80 (D) 100º C 120º C 3% very good white Low cost plastic balls used in bearings,valves, etc. resitent to alkalis andpetroleum products and most mildchernicals.DELRIN (ACETALRESIN - POM)1.45 80 (D) 100º C 140º C minimum up to-40º Cwhite Similar to polymide but slightlyharder and denser and with low waterabsorption.POLYPROPYLE-NE (PP)0.92 80 (D) 80º C 100º C minimum very good ivory Low weight and low water absorptionused in fluid level gauges, flowmetersand valves where these propertiesare required with good corrosionresitance.Grade Sphericity Tolerance SurfaceInches mm Inches mmI 0.0005 0.0125 +/-0.001 0.025 PolishedII 0.001 0.025 +/-0.002 0.050 Polished andunpolishedIII 0.005 0.125 +/-0.005 0.125 Unpolished10
CERAMIC BALLSCeramic balls are widely used in strong conditons. Ceramic have a lower density than steel, a low coefficient of termalexpansion and a very high hardness. They have a long life in very high velocitiy applications. The most importantmaterials are Silicion Nitrid, Alumina Oxide and Zirconium Oxide.Si 3N 4SILICON NITRIDEThe most widely used type of ceramic due to very high resistance to wear and abrasion in general. It has a low coefficientof thermal expansion (25% of that of steel balls) and a weight 60% lower than steel. It has a micro-structure speciallydesigned for applications subject to great stress. It does not require lubrication, it is resistant to corrosion, antimagneticand electrically insulating, and it continues to be efficient at high temperatures up to +1400 °C. It combinesextreme hardness with a high precision ball. Si3N4 balls are widely used in high precision bearings in the airspaceindustry, for machine tools, measurement instruments, valves for automotive technique, compressors and fast turninghard disc.AL 2O 3ALUMINIA OXIDEAlumina Oxide balls are particularly well suited for use in extremely harsh environments where high temperatures,corrosive and erosive substances are present. Standard 99.5% alumina oxide ceramic balls have proven performancein wear, heat and corrosive environments, as well as, in maintaining dimensional stability at temperatures up to2000°F.Alumina resists oxidation and is tolerant to water, salt solutions, and many chemicals and acids, but is not suitable foruse in hydrochloric or hydrofluoric acids or strong alkaline solutions. Typical applications include pumps, valves andflow metersZr0 2ZIRCONIUM OXIDEThis material, compared has a high degree of compactness and considerable flexural strength, which makes it veryreliable. It also has a low modulus of elasticity, close to that of steel, together with an extraordinarily low thermalconductivity.Ceramic TypeALUMINIA OXIDEZIRCONIUM OXIDEChemicalcompositionDensityHardenessMax. operatingtemperature99,5% AL 2 O 33,90 g/cm³ 1700 HV 1750ºC/3182ºF5% Other97% ZrO 25,50 g/cm³ 800 HV 1100ºC/2012ºF3% MgOCorrosionresistanceInvert to most acids, but notreccomended in envionmments withsulphuric or hydrofluoric acids orstrong solutions.Inert except to hydrofluoric acid andstrong concentrations of sulphuricacid.SILICON NITRIDE87% SI 3 N 43,20 g/cm³ 1700 HV 1000ºC/1832ºF Inert to most acids13% Other11
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