32004 X Bearings
32004 X Bearings
30204 Bearings
30204 Bearings

30304 Bearings

30304 Bearings
30304 Bearings

30304 Single row tapered roller bearing, inch size

Technical Specification of 30304 Bearings

Dimensions of 30304 Bearings

20 mm
Bore diameter
52 mm
Outside diameter
16.25 mm
Total width
34.4 mm
Shoulder diameter of inner ring
15 mm
Width of inner ring
13 mm
Width of outer ring
min.1.5 mm
Chamfer dimension of inner ring
min.1.5 mm
Chamfer dimension of outer ring
11.153 mm
Distance side face to pressure point

Abutment Dimensions of 30304 Bearings

max.28 mm
Diameter of shaft abutment
min.27.5 mm
Diameter of shaft abutment
min.44 mm
Diameter of housing abutment
max.45.5 mm
Diameter of housing abutment
min.47 mm
Diameter of housing abutment
min.2 mm
Minimum width of space required in housing on large side face
min.3 mm
Minimum width of space required in housing on small side face
max.1.5 mm
Radius of shaft fillet
max.1.5 mm
Radius of housing fillet

Caliculation Data of 30304 Bearings

Basic dynamic load ratingC
41.9 kN
Basic static load ratingC0
32.5 kN
Fatigue load limitPu
3.55 kN
Reference speed 
12 000 r/min
Limiting speed 
14 000 r/min
Limiting valuee
Calculation factorY
Calculation factorY0

Mass of 30304 Bearings

0.17 lb

Product Features of 30304 Bearings

  • Single row tapered roller bearings, inch sizes, designed to accommodate combined radial and axial loads and provide low friction in operation. The inner ring, including the rollers and cage, can be mounted separately from the outer ring.

  • These detachable and interchangeable parts facilitate installation, removal and maintenance. Rigid applications of bearings are achieved by mounting one single row tapered roller bearing on top of another and applying preload.

  • High radial and axial load carrying capacity

  • Accommodates axial loads in one direction

  • low friction and long service life

  • Separable and Interchangeable Components

Applications of 30304 Bearings

  • Double row/single row tapered roller bearings are mainly used in gearboxes, lifting equipment, steel rolling mills and for mining machinery, such as pit boring machines.

  • In the front wheel hub of the car, the small size of double row tapered roller bearings are used

  • Four-row tapered roller bearings four-row tapered roller bearings used in large cold, hot rolling mills and other heavy machinery. Mainly used in heavy machinery.

Applications of W 618/0.6 Bearings
Applications of Bearings
Wind Turbines
Applications of Bearings
Steel Industry
Applications of Bearings
Applications of Bearings
Food Processing Machinery
Applications of Bearings
Applications of Bearings
Mining & Construction
Applications of Bearings
Electric motors and generators

Product classification of Tapered roller bearings


  • Ball bearings are ideal for high-speed rotation, while roller bearings are more suited for high loads.
  • Because cylindrical roller bearings have separable inner and outer rings, they generally do not come with seals (open specification). As such, please apply seals or other protection around the equipment mounting.
  • EW Series bearings are small and utilize a pressed cage, making them suitable for standard operating conditions. ET Series bearings use a polyamide-resin cage suited for high temperatures. Finally, EM Series bearings have machined cages for use in harsh conditions such as gearboxes or vibrating machinery or in applications where the bearing must be quiet, such as in mid-to-large size motors.

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