3878/20

Tapered roller bearings - Single-row - Inch series

Specifications
(Boundary dimensions ...etc)

d
36.512 mm
D
85.725 mm
T
30.162 mm
B
30.162 mm
C
23.812 mm
r(min.)
0.8 mm
r1(min.)
3.2 mm
Basic load ratings : Cr
135 kN
Basic load ratings : C0r
136 kN
Fatigue load limit : Cu
20.3 kN
Limiting speeds(Grease lub.)
4800 min-1
Limiting speeds(Oil lub.)
6400 min-1
Load center spread : a
22.9 mm
Constant :e
0.40
Axial load factors : Y1
1.49
Axial load factors : Y0
0.82

Mounting dimensions

da
48.0 mm
db
47.0 mm
Da
73.0 mm
Db
81.0 mm
ra(max.)
0.8 mm
rb(max.)
3.2 mm

Refer.

(Refer.)Mass
0.890 kg

Technical calculation for this product.

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