Timken 78251D
Tapered Roller Bearings - Double Tapered Cones - Imperial
(BRAND)：TIMKEN
(Availability)：In Stock
(EMAIL)：info@noksbearings.com
Specifications
Series
78000
Cone Part Number
78251D
Design Units
Imperial
Cage Type
Stamped Steel
C1 - Dynamic Radial Rating (1 million revolutions)1
171000 N
C0 - Static Radial Rating
193000 N
Dimensions
d - Cone Bore
63.500 mm
B - Double Cone Width
65.989 mm
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius2
2.300 mm
da - Cone Frontface Backing Diameter
79 mm
Ab - Cage-Cone Frontface Clearance
2 mm
Basic Load Ratings
C90 - Dynamic Radial Rating (90 million revolutions)3
44300 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4
298000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5
77200 N
C6
65700 N
Factors
K - Factor7
0.67
G1 - Heat Generation Factor (Roller-Raceway)
62.6
G2 - Heat Generation Factor (Rib-Roller End)
19.1
Cg - Geometry Factor8
0.0884
