Tapered Roller Bearings - TDO (Tapered Double Outer) Imperial Timken 748-S - 742D

Описание

The configuration of the TDO provides a wide effective bearing spread, making it ideal for applications in which overturning moments are a significant load component. TDO bearings can be used in fixed positions or allowed to float in the housing bore. Specifications Series 745 Cone Part Number 748-S Cup Part Number 742D Design Unit Inch Cage Material Stamped Steel Related Assembly Number(s) 748S-90025 Dimensions d - Bore 3 in D - Cup Outer Diameter 6-1/8 in B - Cone Width 1.8375 in C - Double Cup Width 3.3750 in T - Bearing Width across Cones 4.0000 in Abutment and Fillet Dimensions R - Cone Backface "To Clear" Radius1 0.14 in r - Cup Backface "To Clear" Radius2 0.06 in db - Cone Backface Backing Diameter 3.66 in Da - Cup Frontface Backing Diameter 5.64 in Aa - Cage-Cone Backface Clearance 0.05 in a - Effective Center Location3 -0.47 in Basic Load Ratings C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)4 21900 lbf C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)5 147000 lbf C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)6 38200 lbf Ca90- Dynamic Thrust Rating (90 million revolutions)7 12200 lbf Factors K - Factor8 1.8 e - ISO Factor9 0.33 Y1 - ISO Factor10 2.08 Y2 - ISO Factor11 3.09 Cg - Geometry Factor12 0.0898