Double Row TNA SeriesNA3780 Bearing

Double row tapered roller bearing TNA bearings are non-adjustable, double-row bearings that are supplied with built-in clearance.This results in a specifified mounting setting range satisfactory for specifific applications. They are similar to type TDO, but the  inner-ring front faces are extended so that they abut, which eliminates the need for the  inner-ring spacer of a TDO bearing.They can be used at either fixed positions or allowed to float in the housing bore to compensate for shaft expansion.


For desired fifitting practice and resultant mounted setting  range information, contact your VAFEM engineer. If a closer control of mounted setting range is required, type TDO bearing assembly is recommended.

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

Dimension and Parameters

Bearing Dimensions(mm/in.)
d :2
D :3.6718
T :2.5625
C :2.0625
Load Ratings(N/lbf)
Dynamic(1)
C1(2) :47800
Factors(2)
e :0.34
Y1 :1.99
Y2 :2.97
Dynamic(3)
C90 :7120
Ca90 :4120
C90(2) :12400
Factors(2)
K :1.73
Part Number
Inner :NA3780
Outer :3729D
Bearing Dimensions(mm/in.)
Shaft
Max. Shaft Fillet Radius
R(4) :0.14
Backing Shoulder Dia.
db :2.52
Housing
Max. Housing Fillet Radius
r(4) :0.03
Backing Shoulder Dia.
Da :3.46
Pin(mm/in.)
Ka :
Kb :
Bearing Weight(kg/lbs.) :4.02
Part Number:
d:
D:
B:
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