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Schaeffler
R31311-A
Tapered roller bearing R31311-A
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Main Dimensions & Performance Data
d
55 mm
Bore diameter
B
29 mm
Width, inner ring
Cr
123,000 N
Basic dynamic load rating, radial
C0r
139,000 N
Basic static load rating, radial
Cur
16,400 N
Fatigue load limit, radial
nG
5,900 1/min
Limiting speed
nϑr
3,950 1/min
Thermal speed rating
≈m
1 kg
Weight

Mounting dimensions
da max
68 mm
Maximum diameter of shaft shoulder
db min
65 mm
Minimum diameter of shaft shoulder
CRa min
6.5 mm
Minimum axial space
CRb max
0 mm
Maximum axial space
ra max
2.5 mm
Maximum fillet radius of shaft

Dimensions
r1, 2 min
2.5 mm
Minimum chamfer dimension of inner ring back face
a
37 mm
Distance between the apexes of the pressure cones
d1
88 mm
Guidance rib diameter of inner ring
T1
31.5 mm
Width, total of inner subunit assembled with a master outer ring
E
89.563 mm
Inside diameter of outer ring back face
α
28.81083 °
Contact angle

Temperature range
Tmin
-30 °C
Operating temperature min.
Tmax
120 °C
Operating temperature max.

Calculation factors
e
0.83
Limiting value of Fa/Fr for the applicability of diff. Values of factors X and Y
Y
0.73
Dynamic axial load factor
Y0
0.4
Static axial load factor

Additional information
T7FB055
Comparative designation to ISO 10317 and ISO 355

Your current product variant
Tolerance classPNNormal (ISO 492:2014)
Heat treatmentStandard
CageStandardSheet steel cage, roller-guided
Internal designStandard
Quality levelStandard
Number of rolling element rows1Single-row design
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