Double Row TDI Series78251D Bearing

Double row tapered roller bearing TDI style consists of a single-piece (double) inner ring plus two single outer rings. It is normally supplied complete with an outer-ring spacer as a pre-set assembly. To suit the application duty, the builtin setting value needs to be established by your VAFEM engineer before an order is placed. A groove and holes can be supplied in the outerring spacer to allow lubricant to pass from the bearing  housing. Contact your VAFEM engineer for spacer information.

VAFEM (Shang Hai) Bearing Technology Co.,Ltd
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Double Row TDI Series

Dimension and Parameters

Bearing Dimensions(mm/in.)
d :63.5
D :140.03
T :66.09
B :65.989
Load Ratings(N/lbf)
Dynamic(1)
C1(2) :298000
Factors(2)
e :0.9
Y1 :0.8
Y2 :1.2
Dynamic(3)
C90 :44300
Ca90 :65700
C90(2) :77200
Factors(2)
K :0.67
Part Number
Inner :78251D
Outer :78551
Bearing Dimensions(mm/in.)
Shaft
Max. Shaft Fillet Radius
R(4) :2.3
Backing Shoulder Dia.
da :79
Housing
Max. Housing Fillet Radius
r(4) :2.3
Backing Shoulder Dia.
Db :117
Geometry Factors
G1 :62.6
G2 :19.1
Cg :0.0884
Bearing Weight(kg/lbs.) :4.83
Part Number:
d:
D:
B:
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