Specifications
Series :675
Cone Part Number : 688TD
Cup Part Number :674
Design Unit : Inch
Cage Material : Stamped Steel
Dimensions
d - Bore : 3.9453 in / 100.211 mm
D - Cup Outer Diameter : 6.7500 in / 171.450 mm
B - Double Cone Width : 3.7500 in /95.250 mm
C - Cup Width : 1.1875 in / 30.163 mm
T - Bearing Width across Cups : 3.7500 in / 95.250 mm
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius1 : 0.03 in / 0.800mm
r - Cup Backface "To Clear" Radius2 : 0.130 in / 3.30mm
da - Cone Frontface Backing Diameter : 4.45 in / 113 mm
Db - Cup Backface Backing Diameter : 5.91in / 150.11 mm
Ab - Cage-Cone Frontface Clearance : 0.12in / 3 mm
Basic Load Ratings
C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)3 : 14600lbf/ 68400N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4: 97800 lbf /435000 N
C90(2) - Dynamic Radial Rating(Two-Row, 90 million revolutions)5 :25400lbf/ 113000N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 : 11700 lbf /52200 N
Factors
K - Factor7 : 1.24
e - ISO Factor8 : 0.47
Y1 - ISO Factor9 : 1.43
Y2 - ISO Factor10 : 2.14
G1 - Heat Generation Factor (Roller-Raceway) ：820
G2 - Heat Generation Factor (Rib-Roller End)： 172
Cg - Geometry Factor11 : 0.106
