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Bearing Replacement Guide
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Catalog excerpts

Bearing Replacement Guide - 1

MOTION & CONTROL™ BEARING REPLACEMENT GUIDE

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Bearing Replacement Guide - 3

Engineering Section Bearing Types and Performance 9 Inspection Bearing Failures 22 Bearings Selection Selection by Dimensions (Metric) 28 Selection by Dimensions (Inch) 102 Bearings Tables Extra Small Bearings 138 Maximum Type Ball Bearings 139 Double Row Deep Groove Ball Bearings 140 Single Row Angular Contact Ball Bearings 144 Double Row Angular Contact Ball Bearings 152 Duplex Ball Bearings (4 Contact Points) 156 Self-Aligning Ball Bearings 162 Cylindrical Roller Bearings 170 Tapered Roller Bearings 186 Spherical Roller Bearings 218 Super Precision Bearings 253 Other Product Ranges 261...

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Bearing Replacement Guide - 4

As one of the world's leading manufacturers of rolling bearings, linear technology components and steering systems, we can be found on almost every continent - with production facilities, sales offices and technology centres - because our customers appreciate short decision-making channels, prompt deliveries and local service. Pacific states aaaaa aaaa NSK commenced operations as the first Japanese manufacturer of rolling bearings back in 1916. Ever since, we have been continuously expanding and improving not only our product portfolio but also our range of services for various industrial...

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Bearing Replacement Guide - 5

The NSK brand, recognised around the world From home appliances, automobiles, and capital equipment to the aerospace industry – NSK bearings are used in an extensive range of applications. NSK established its global-scale enterprise on technology that has met the exact requirements of global industry. We have also established R&D systems and support services to meet the diverse needs of our customers in every continent. As a brand recognised around the world NSK continues to lead industry with its technical prowess. NSK is on the move, across the globe Headquarters Technical Offices Plants...

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Bearing Replacement Guide - 7

Technical Information Terminology Bearing Types and Performance Internal Clearance Precision Class Bearing Lubrication Care & Maintenance Inspection, Bearing Failures How to Order Replacement Bearings 8 9 10 11 12 15 22 24 Bearing replacement guide 7 NSK_BRG_GB_x.indd 7 29.11.10 10:32

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Bearing Replacement Guide - 8

Terminology Design and Classification Rolling bearings use balls or other rolling elements, located between bearing rings, to minimize friction. The rolling elements are separated and held in position by “cages” or other retaining devices. The construction of six of the most common rolling element bearings are illustrated here for identification of nomenclature. Specific dimensions and details for these bearings are given in the dimensional tables in the following sections of this catalog. Width Width Outer Ring Outer Ring Cage Outside Diameter Outer Ring Raceway Shield or Seal Single Row...

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Bearing Replacement Guide - 9

Bearing Types and Performance Hohe Hohe Hohe Kombinierte Kombinierte Kombinierte Kombinierte RadialAxial Loads High Angular Hohe Kombinierte HoheSpeeds Axiallasten Axiallasten Axiallasten Combined Loads Winkelabweichung WinkelabweichungWinkelabweichun Winkelabweichung Axiallasten Winkelabweichung Drehzahlen Misalignment Belastungen Drehzahlen Belastungen Drehzahlen belastungen belastungen belastungen Belastungen Belastungen Drehzahlen belastungen Belastungen Drehzahlen Bearing Type Lagertyp RadialSeries RadialRadialRadial Loads RadialAxiallasten Deep groove 600-6000-6200- Good belastungen...

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Bearing Replacement Guide - 10

Bearing Internal Clearance Internal Clearances and Standards Bearing internal clearance is the total clearance between the rings and rolling elements. Internal clearance influences fatigue life, vibration, noise, and operating temperature. Therefore, selection of the proper clearance is critical. Radial and axial clearances are defined as the total amount that one ring can be displaced relative to the other in either the radial or axial direction as shown in this drawing. To obtain accurate measurements for ball bearings, internal clearance is usually measured by applying a specified Axial...

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Bearing Replacement Guide - 11

Precision Class Bearing Tolerance Standards The dimensional and running accuracies of rolling bearings are standardized by ISO with regard to the following items: › Tolerances for bore diameter, outer diameter, individual ring width, and overall width › Tolerances for absolution dimensions of inscribed circle diameter and circumscribed circle diameter › Tolerances for chamfer dimension › Tolerances for width variations › Tolerances for taper angle and taper bore diameters › Tolerances for radial runout of inner ring and outer rings › Tolerances for axial runout of inner and outer rings ›...

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Bearing Replacement Guide - 12

Bearing Lubrication Lubrication - the Purpose Lubrication is needed to reduce friction and wear inside the bearing. Proper lubrication and procedures will allow the bearing to reach its expected life. Primarily, lubrication serves the following purposes: › Reduces Friction and Wear – Direct metallic contact between the bearing rings, rolling elements and cage is prevented by an oil film which reduces the friction and heat at the contact areas. › Extends Bearing Life – The rolling fatigue life of bearings depends in a large part on the viscosity and film thickness of the lubricant. A heavy...

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Bearing Replacement Guide - 13

Consistency Number [Given by the National Lubricating Grease Institute (NLGI) Scale] 0 2 3 4 Consistency (1) (1/10 mm) 385~355 340~310 295~265 250~220 205~175 Working Condition (1) 1 For centralized oiling. When false brinelling is liable to occur. For centralized oiling. When fretting is liable to occur. For low temperature. For general use. For sealed bearings. For high temperature. For general use. For sealed bearings. For high temperature. For grease seals. Consistency: Depth into grease attained by a cone when pressed with a specified weight, indicated in units of 1/10 mm. The larger...

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Bearing Replacement Guide - 14

Bearing Lubrication Radial Ball Bearings (a), Cylindrical Roller Bearings (b) (2) Tapered Roller Bearings, Spherical Roller Bearings *P=Bearing Load, C=Dynamic Load Rating When the operating speed exceeds the grease limiting speed listed for the bearing, oil lubrication should be used. Several methods are available and are described below. The best method to use will depend on operating conditions. Splash Lubrication: Drip Feed Lubrication: Circulating system lubrication: high speeds and high temperature high speeds to ultra high speeds ultui high speeds, like iet engine or machine tool...

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