SEMRI Double row tapered roller bearings 74512D - 74845
Specifications
Series :74000
Cone Part Number : 74510D
Cup Part Number : 74848
Design Unit : inch
Cage Material : Stamped Steel
Dimensions
d - Bore : 5.1250 in / 130.175mm
D - Cup Outer Diameter : 8.4636 in / 214.975mm
B - Double Cone Width : 4.000 in /101.600 mm
C - Cup Width : 1.3750 in / 34.925 mm
T - Bearing Width across Cups : 4.000in /101.600 mm
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius1 : 0.06 in / 1.5mm
r - Cup Backface "To Clear" Radius2 : 0.130 in / 3.30mm
da - Cone Frontface Backing Diameter : 5.75 in / 146mm
Db - Cup Backface Backing Diameter : 7.72 in / 199.09 mm
Ab - Cage-Cone Frontface Clearance : 0.11in / 2.8 mm
Basic Load Ratings
C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)3 : 22300lbf/ 99000N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4: 150000 lbf /665000 N
C90(2) - Dynamic Radial Rating(Two-Row, 90 million revolutions)5 :38800lbf/ 172000N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 : 18600 lbf /82600 N
Factors
K - Factor7 : 1.2
e - ISO Factor8 : 0.49
Y1 - ISO Factor9 : 1.38
Y2 - ISO Factor10 : 2.06
G1 - Heat Generation Factor (Roller-Raceway) ：363
G2 - Heat Generation Factor (Rib-Roller End)： 68.5
Cg - Geometry Factor11 : 0.134
