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FAG
K78250-78537-W215D
Tapered roller bearing K78250-78537-W215D
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Main Dimensions & Performance Data
d
63.5 mm
Bore diameter
D
136.525 mm
Outside diameter
B
33.236 mm
Width, inner ring
C
23.52 mm
Width, outer ring
T
36.512 mm
Width, total
Cr
145,000 N
Basic dynamic load rating, radial
C0r
168,000 N
Basic static load rating, radial
Cur
20,600 N
Fatigue load limit, radial
nG
5,200 1/min
Limiting speed
nϑr
4,650 1/min
Thermal speed rating
≈m
2.3 kg
Weight

Mounting dimensions
da max
78 mm
Maximum diameter of shaft shoulder
db min
83 mm
Minimum diameter of shaft shoulder
Da min
105 mm
Minimum diameter of housing shoulder
Da max
125 mm
Maximum diameter of housing shoulder
Db min
129 mm
Minimum diameter of housing shoulder
Ca min
4 mm
Minimum axial space
Cb min
10 mm
Minimum axial space
ra max
2.3 mm
Maximum fillet radius of shaft
rb max
3.3 mm
Maximum fillet radius of housing

Dimensions
r1, 2 min
2.3 mm
Minimum chamfer dimension of inner ring back face
r3, 4 min
3.3 mm
Minimum chamfer dimension of outer ring back face
a
44 mm
Distance between the apexes of the pressure cones
d1
100.4 mm
Guidance rib diameter of inner ring

Temperature range
Tmin
-30 °C
Operating temperature min.
Tmax
200 °C
Operating temperature max.

Calculation factors
e
0.87
Limiting value of Fa/Fr for the applicability of diff. Values of factors X and Y
Y
0.69
Dynamic axial load factor
Y0
0.38
Static axial load factor

Your current product variant
Heat treatmentW215DBainitic hardened
CageStandardSheet steel cage, roller-guided
Internal designStandard
Quality levelStandard
Number of rolling element rows1Single-row design
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