Browning Mounted Bearing - Engineering - BMB-07

1 260 See page 156 for trademark Mounted BearingTechnical SupportBrowning Technical ServicesPhone: 606-564-2093 FAX:606-564-2079 Mounted Bearing Application EngineeringPhone: 219-465-2211 FAX:219-465-2290E-mail: proper selection and application of power transmission products and components, including the related area of productsafety, is the responsibility of the customer. Operating and performance requirements and potential associated issues willvary appreciably depending upon the use and application of such products and components. The scope of the technical andapplication information included in this publication is necessarily limited.

2 Unusual operating environments and conditions,lubrication requirements, loading supports, and other factors can materially affect the application and operating results of theproducts and components and the customer should carefully review its requirements. Any technical advice or review fur-nished by Emerson Power Transmission Corporation and its divisions with respect to the use of products and components isgiven in good faith and without charge, and Emerson assumes no obligation or liability for the advice given, or resultsobtained, all such advice and review being given and accepted at customer's a copy of our Standard Terms and Conditions of Sale, Disclaimers of Warranty, Limitation of Liability and Remedy, pleasecontact Emerson Power Transmission Customer Service at 1-800-626-2120.

3 These terms and conditions of sale, disclaim-ers and limitations of liability apply to any person who may buy, acquire or use an Emerson Power Transmission Corporationproduct referred to herein, including any person who buys from a licensed distributor of these branded CONSIDERATIONSBMB-07 , 6:35 AM260261 See page 156 for trademark 262 Selection/Life CalculationsBall Bearings .. 266 Tapered Roller Bearings .. 268 Spherical Roller Bearings .. 269 Load Capacity/Life TablesBall Bearings 100 Series .. 270 ball Bearings 200 & 300 Series .. 271 Tapered Roller Bearings 900 & 950 Series.

4 272 Tapered Roller Bearings 920 & 970 Series .. 273 Spherical Roller Bearings 1000 & 1100 Series .. 274 Spherical Roller Bearings 22200 & 22500 .. 275 General 276 Sample 278 Installation InstructionsSet Screw Lock .. 280 BOA Concentric .. 281 Eccentric Lock .. 282 Insert Replacement ball Bearings .. 286950/970 Tapered Roller Bearings .. 287 LubricationBall Bearings .. 288 Tapered Roller Bearings .. 289 Spherical Roller Bearings .. 291 Vibration AnalysisBall Bearings .. 292 Tapered Roller Bearings 900 & 950 Series .. 295 Tapered Roller Bearings 920 & 970 Series .. 296 Spherical Roller Bearings 1000 &1100 Series.

5 297 Spherical Roller Bearings 22200 & 22500 .. 298 BMB-07 , 6:35 AM261262 See page 156 for trademark , , , , , "HA" )HA( "HA" )002(kcoLwercSteS)002(cirtnecnoCAOB)001( kcoLcirtneccEnoitamrofnIegnalFtloBowT)00 2(kcoLwercSteS)003(kcoLwercSteS)001(kcoL wercSteS)002(cirtnecnoCAOB)003(cirtnecno CAOB)002(kcoLcirtneccE)001( , 6:35 AM262263 See page 156 for trademark ,441citatStnemngilasiMdesuoHlladnasgnira eBrelloRderepaT079dna059eht(gningilafles yllanretxeerasgniraeBllaBdetnuoMehtottce pserhtiwngilasimnactresnigniraebrofdetiu sllewerasgniraebesehT). (gningilacimanydstimrepngisedsihT). ,eussinasiesiongniraeberehWseificepsxiff us"HA" "HA"naesion% )HA( , 6:35 AM263264 See page 156 for trademark )002(kcoLwercSteS)003(kcoLwercSteS)001(k coLwercSteS)002(kcoLcirtneccE)001( )002(kcoLwercSteS)003(kcoLwercSteS)002(c irtnecnoCAOB)003( , ,ycneuqerfnoitacirbuler, , 6:35 AM264265 See page 156 for trademark ConsiderationsnoitacilppAnoitaredisnoCno itadnemmoceRgniraeBdetnuoMecnerefeRgnitr atSegaPegdirtraCtnemecalpeRahtiwemocsgni raeBllaBdetnuoMdesuoHllA, )KN( , 6.

6 35 AM265266 See page 156 for trademark a3 factor takes into account a wide range of application and mount-ing conditions as well as Bearing features and design. Accuratedeterminiation of this factor is normally achieved through testing andin-field experience. Consult EPT Mounted Bearing Tech Support formore information.*See sample calculations on page an initial Bearing size and calculate the expected Lna life. If thelife is not acceptable, select another Bearing size as appropriate andrecalculate the Lna life. Continue this iterative process until an appro-priate Lna life is Load CalculationFor applications where combined radial and thrust loads are presentthe equivalent radial load (P) must be calculated before applying L10life For applications with only a radial load present P = Fr Where Fr = Applied radial load in applications with only a thrust load present EPT Mounted Bearing Tech (P) equivalent radial Use Table 3 to identify the relative axial load factor (ND2).

7 2. Determine the relative axial load (RAL): Fa -applied thrust load ND2 -relative axial load factor3. Match the nearest relative axial load value in Table #3 to the corresponding e value. for precise calculation, linearly interpolate the values for e for your exact relative axial load Calculate Fa/Fr and compare value to the e value found in step # Choose values for X and Y based on step #3 & 4 and from TableNo. 3. Linear interpolation is recommended for Calculate equivalent radial load using the following equation:P=XFr+YFa7. Calculate the adjusted life (Lna) using the life calculation to Page 304 for Relevant SYMBOLS FOR LIFE CALCULATIONC- Basic Dynamic Rating (lbs)C0- Static Rating (lbs)1,000,000 Revolutionsn- Speed (RPM)P- Equivalent Radial Load (lbs)K- Geometry FactorL10 - Rated Life (Hours)X- Radial FactorLna- Adjusted Rated LifeY- Thrust FactorFa- Applied Thrust Load (lbs)e- Geometry RatioFr- Applied Radial Load (lbs) ball Bearing Life CalculationThe following formula provided by the Anti Friction Bearing Manufactur-ers Association (ABMA)

8 Provides a method for calculating estimatedfatigue life of ball = (C/P)3 x 16667 nWhere:L10 = The number of hours that 90% of a group of identical bearingsunder ideal conditions will operate at a specific speed and load condi-tion before fatigue failure is expected to , the ABMA provides application factors for ball Bearingswhich need to be considered to determine an adjusted Rated Life (Lna).Lna = a1 x a2 x a3 x L10 Where:Lna = Adjusted Rated = Reliability factor applied where estimated fatigue life is based on reli-ability other than 90% (See Table No 1).Table 1 Life Adjustment Factor for Reliabilitya2 = Material FactorLife adjustment for Bearing race material.

9 All Browning ball bearingraces are manufactured from 52100 Vacuum Degassed Bearing the a2 factor is for all Browning ball Bearings. It is impor-tant to check with all manufacturers to ensure that proper adjustmentsare made when other Bearing steels are = Life Adjustment Factor for Operating ConditionsThis factor should take into account the adequacy of lubricant, pres-ence of foreign matter, conditions causing changes in material proper-ties, and unusual loading or mounting conditions. Assuming a properlyselected Bearing having adequate seals and lubricant operating below200 F and tight fitted to the shaft, the a3 factor should be ball bearings are typically slip fitted to the shaft and rely ondesign features such as the inner race length and locking device forsupport.

10 ABMA recommends an a3 factor of .456 for slip fit ball bear-ings.*Selection/Life CalculationsRAL= ball BearingsShock and Vibration Vibration and shock loading can act as an addi-tional loading to the steady expected applied load. When shock orvibration is present, the following a3, Life Adjustment Factors are rec-ommended. The shock factor is used in combination with the slip fit 2 Shock/Vibration Factor% , 6:35 AM266267 See page 156 for trademark CalculationsFor Inserts not shown in table 4:Insert:VE-200VS-100VB-200VE-100 VER-200LS-100 SLS-100LE-100 SLE-100 RUBRE-100LR-100 RUBRS-100 LRS-100 Ratings: Use standard duty, 200 Series, ratingsand factors for respective bore 200 Series for highest :VS-300VB-300 Ratings: Use medium duty, 300 Series, ratingsand factors for respective bore EPT Mounted Bearing Tech Support at219-465-2211 for additional BearingsTable 3 New Applicatioins.