30300 Series

30300 Series

30311J2/Q

Description

Tapered roller bearings have tapered inner and outer raceways and rollers to handle simultaneous radial and thrust loads. Their axial load carrying capacity is directly related to the contact angle of the rollers and raceway shaft. 

They are available in single-row, double-row, and four-row designs. The individual parts of tapered roller bearings are commonly sold separately as cups and cones. Cones contain the roller assembly and inner ring while cups include the outer ring. Full assembly units contain both the cup and cone. As separable bearings, different designs and sizes are available to accommodate a variety of applications.


Dimension and Parameters

30300 Series 30300 Series
Designation :30311J2/Q
Principal dimensions(mm)
d1 :55
D :120
B :31,5
Basic load ratings(KN)
dyc(Cr) :166
stc(Cor) :163
Pu :19,3
Speed ratings(rpm)
Speed Ratings :4800
Limiting Speed :5600
Weight(Kg) :1,55
ISO335 
Dimensions (ABMA) :2FB
Dimensions (mm)
d :55
d1~ :84
B :29
C :25
r1,2(min) :2,5
r3,4(min) :2
a :24
Abutment and fillet dimensions (mm)
da(max) :71
db(min) :65
Da(min) :104
Da(max) :112
Db(min) :111
Ca(min) :4
Cb(min) :6,5
ra(max) :2
rb(max) :2
Value
e :0,35
Y :1,7
Yo :0,9