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30304-A
Tapered roller bearing
Tapered roller bearings 303, main dimensions to DIN ISO 355 / DIN 720, separable, adjusted or in pairs
Replaces
30304A, 30304A.J42A
Product information
Metric
Imperial
Main Dimensions & Performance Data
d | 20 mm | Bore diameter |
D | 52 mm | Outside diameter |
B | 15 mm | Width, inner ring |
C | 13 mm | Width, outer ring |
T | 16.25 mm | Width, total |
Cr | 34,000 N | Basic dynamic load rating, radial |
C0r | 32,500 N | Basic static load rating, radial |
Cur | 3,700 N | Fatigue load limit, radial |
nG | 15,600 1/min | Limiting speed |
nϑr | 9,700 1/min | Thermal speed rating |
≈m | 0.168 kg | Weight |
Mounting dimensions
da max | 28 mm | Maximum diameter of shaft shoulder |
db min | 27 mm | Minimum diameter of shaft shoulder |
Da min | 44 mm | Minimum diameter of housing shoulder |
Da max | 45 mm | Maximum diameter of housing shoulder |
Db min | 47 mm | Minimum diameter of housing shoulder |
Ca min | 2 mm | Minimum axial space |
Cb min | 3 mm | Minimum axial space |
ra max | 1.5 mm | Maximum fillet radius of shaft |
rb max | 1.5 mm | Maximum fillet radius of housing |
Dimensions
r1, 2 min | 1.5 mm | Minimum chamfer dimension of inner ring back face |
r3, 4 min | 1.5 mm | Minimum chamfer dimension of outer ring back face |
a | 12 mm | Distance between the apexes of the pressure cones |
d1 | 36.1 mm | Guidance rib diameter of inner ring |
Temperature range
Tmin | -30 °C | Operating temperature min. |
Tmax | 120 °C | Operating temperature max. |
Calculation factors
e | 0.3 | Limiting value of Fa/Fr for the applicability of diff. Values of factors X and Y |
Y | 2 | Dynamic axial load factor |
Y0 | 1.1 | Static axial load factor |
Additional information
T2FB020 | Comparative designation to ISO 10317 and ISO 355 |