Catalog excerpts
LONG-LIFE WATER-RESISTANT BEARING GREASE FOR ROLLING MILLS
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Grease for sealed type roller bearings What causes flaking and how can it be prevented? Flaking occurs when small pieces of bearing material are split off from the smooth surface of the raceway or rolling elements due to rolling fatigue, thereby causing areas with rough and coarse texture. Possible causes are due to poor lubrication, improper lubricant, entry of foreign debris and entry of water. Particularly for the sealed type 4-row tapered roller bearings, NSK developed long-life water-resistant grease (AQGRD R1) which is enhanced in base oil viscosity and special water-resistant...
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Flaking Life Test Life ratio Existing grease Bearing: 32968, P/C: 0.15, Speed: 567 r/min Scenario of cold rolling work roll at following conditions Bearing: HR32017XJ (open single-row tapered roller bearing) Room temperature while bearing temperature at 60-70 ºC Radius force: 35.8kN, Axle force: 15.7kN, P/C: 0.25, Speed: 1500 r/min Typical Analysis CONTENTS NLGI grade Consistency (worked penetration) Base oil Thickener Base oil viscosity, mm2/s at 40ºC/ at100ºC 322 Mineral oil Lithium complex soap 352 / 28.7 Viscosity index Water washout (mass%) Corrosion preventive properties (based on...
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NSK Sales Offices – Europe, Middle East and Africa UK NSK UK Ltd. Northern Road, Newark Nottinghamshire NG24 2JF Tel. +44 (0) 1636 605123 Fax +44 (0) 1636 643276 info-uk@nsk.com France & Benelux Middle East South Africa NSK Bearings Gulf Trading Co. JAFZA View 19, Floor 24 Office 2/3 Linbro Business Park info-me@nsk.com Germany, Austria, Switzerland, Nordic Warsaw Branch C/ Tarragona, 161 Cuerpo Bajo NSK Rulmanları Orta Doğu Tic. Ltd. Şti. Russian Branch Kuriş Kule İş Merkezi No:2 Kat:4 18th Line of Vasilievskiy Ostrov, 34846 Cevizli - Kartal - Istanbul Please also visit our website:...
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