Tapered Roller Bearings - TDO (Tapered Double Outer) Imperial Timken 78238 - 78549D

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 78000 Cone Part Number 78238 Cup Part Number 78549D Design Unit Inch Cage Material Stamped Steel Related Assembly Number(s) 78238-90074 Dimensions d - Bore 2 3/8 in D - Cup Outer Diameter 5.5000 in B - Cone Width 1.3085 in C - Double Cup Width 2.0395 in T - Bearing Width across Cones 3.0625 in Abutment and Fillet Dimensions R - Cone Backface "To Clear" Radius1 0.200 in r - Cup Backface "To Clear" Radius2 0.06 in db - Cone Backface Backing Diameter 3.46 in Da - Cup Frontface Backing Diameter 5.19 in Aa - Cage-Cone Backface Clearance 0.24 in a - Effective Center Location3 0.31 in Basic Load Ratings C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)4 11800 lbf C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)5 79300 lbf C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)6 20600 lbf Ca90- Dynamic Thrust Rating (90 million revolutions)7 17500 lbf Factors K - Factor8 0.67 e - ISO Factor9 0.87 Y1 - ISO Factor10 0.78 Y2 - ISO Factor11 1.16 Cg - Geometry Factor12 0.0884