Double Row TDI Series78255D 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 :2.5586
D :5.513
T :2.602
B :2.598
Load Ratings(N/lbf)
Dynamic(1)
C1(2) :66900
Factors(2)
e :0.9
Y1 :0.8
Y2 :1.2
Dynamic(3)
C90 :9970
Ca90 :14800
C90(2) :17400
Factors(2)
K :0.67
Part Number
Inner :78255D
Outer :78551
Bearing Dimensions(mm/in.)
Shaft
Max. Shaft Fillet Radius
R(4) :0.06
Backing Shoulder Dia.
da :3.11
Housing
Max. Housing Fillet Radius
r(4) :0.09
Backing Shoulder Dia.
Db :4.61
Geometry Factors
G1 :62.6
G2 :19.1
Cg :0.0884
Bearing Weight(kg/lbs.) :10.85
Part Number:
d:
D:
B:
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