Timken 3978
Tapered Roller Bearings - Single Cones - Imperial
(BRAND)：TIMKEN
(Availability)：In Stock
Specifications
Series
3900
Cone Part Number
3978
Design Units
Imperial
Cage Type
Stamped Steel
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1
242000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2
62700 N
Dimensions
d - Cone Bore
59.530 mm
B - Cone Width
30.048 mm
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius3
1.5 mm
da - Cone Frontface Backing Diameter
68 mm
db - Cone Backface Backing Diameter
70 mm
Ab - Cage-Cone Frontface Clearance
2 mm
Aa - Cage-Cone Backface Clearance
1.5 mm
a - Effective Center Location4
-4.6 mm
Basic Load Ratings
C90 - Dynamic Radial Rating (90 million revolutions)5
36000 N
C1 - Dynamic Radial Rating (1 million revolutions)6
139000 N
C0 - Static Radial Rating
191000 N
C7
24800 N
Factors
K - Factor8
1.45
Cg - Geometry Factor9
0.109
