Tapered Roller Bearings - TDI (Tapered Double Inner) Imperial Timken LM121948D - LM121911

Описание

TDI bearings have a one-piece double inner race and two single outer races and are typically supplied complete with an outer race spacer as a pre-set assembly. The bearing can be used at fixed positions on rotation shaft applications. For rotating housing application it can be used to float on the stationary shaft. Specifications Series LM121900 Cone Part Number LM121948D Cup Part Number LM121911 Design Unit Inch Cage Material Stamped Steel Related Assembly Number(s) LM121948D-902A2 Dimensions d - Bore 4 1/4 in D - Cup Outer Diameter 6 in B - Double Cone Width 2.5625 in C - Cup Width 1.1250 in T - Bearing Width across Cups 2.5624 in Abutment and Fillet Dimensions R - Cone Backface "To Clear" Radius1 0.03 in r - Cup Backface "To Clear" Radius2 0.130 in da - Cone Frontface Backing Diameter 4.53 in Db - Cup Backface Backing Diameter 5.51 in Ab - Cage-Cone Frontface Clearance -0.03 in Basic Load Ratings C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)3 9810 lbf C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 65900 lbf C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 17100 lbf Ca90- Dynamic Thrust Rating (90 million revolutions)6 4740 lbf Factors K - Factor7 2.07 e - ISO Factor8 0.28 Y1 - ISO Factor9 2.39 Y2 - ISO Factor10 3.56 G1 - Heat Generation Factor (Roller-Raceway) 218 Cg - Geometry Factor11 0.137 Spacer Note Spacer shows standard nominal .01 radii, actual bearing may vary