Tapered Roller Bearings

Single Row Metric Size Tapered Roller Bearings

Single row metric tapered roller bearings are a common type that is separable. The inner and outer rings of the bearing have tapered raceways, and the rollers are in the shape of a truncated cone. The rollers are in line contact with the raceways and can bear heavier radial and axial combined loads and axial loads. The larger the contact angle, the higher the axial load capacity; conversely, the smaller the contact angle, the lower the axial load capacity. Single row metric tapered roller bearings are designed to extend the contact line of the rollers with the inner and outer raceways and then roll at the same point on the bearing axis.

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Single row metric tapered roller bearings are a common type that is separable. The inner and outer rings of the bearing have tapered raceways, and the rollers are in the shape of a truncated cone. The rollers are in line contact with the raceways and can bear heavier radial and axial combined loads and axial loads. The larger the contact angle, the higher the axial load capacity; conversely, the smaller the contact angle, the lower the axial load capacity.

Single row metric tapered roller bearings are designed to extend the contact line of the rollers with the inner and outer raceways and then roll at the same point on the bearing axis. Single row metric tapered roller shafts mostly use inches.

Bearing Parameters

Bearing NO. Boundary dimensions
(mm)
Mass
(kg)
HEPT d D T
30202 15 35 11.75 0.054
30302 15 42 14.25 0.096
30203 17 40 13.25 0.056
32203 17 40 17.25 0.105
30303 17 47 15.25 0.129
32303 17 47 20.25 0.18
32004X 20 42 15 0.108
30204 20 47 15.25 0.092
30304 20 52 16.25 0.188
32304 20 52 22.25 0.241
32005X 25 47 15 0.12
33005 25 47 17 0.139
30205 25 52 16.25 0.155
32205 25 52 19.25 0.186
33205 25 52 22 0.214
31305 25 62 18.25 0.297
30305 25 62 18.25 0.289
32305 25 62 25.25 0.362
320/28X 28 52 16 0.156
32006X 30 55 17 0.195

Series of single-row metric tapered roller bearings

Popular types of Single row metric tapered roller bearings:

  • 30202
  • 30302
  • 30203

Features of single row metric tapered roller bearings

  • Low friction
    The flange’s optimized roller end design and surface finish promote lubricant film formation, resulting in lower friction. This also reduces frictional heat and flange wear. In addition, the bearings can better maintain preload and run at reduced noise levels.
  • Long service life
    The crowned raceway profiles of basic design bearings and the logarithmic raceway profiles optimize the load distribution along the contact surfaces, reduce stress peaks at the roller ends, and reduce the sensitivity to misalignment and shaft deflection compared with conventional straight raceway profiles.
  • Enhanced operational reliability
    The optimized surface finish on the contact surfaces of the rollers and raceways supports the formation of a hydrodynamic lubricant film.
  • Consistency of roller profiles and sizes
    The rollers incorporated in tapered roller bearings are manufactured to such close dimensional and geometrical tolerances that they are practically identical. This provides optimal load distribution, reduces noise and vibration, and enables preload to be set more accurately.
  • Rigid bearing application
    A single row metric tapered roller bearing is typically adjusted against a second tapered roller bearing. By applying a preload, a rigid bearing application can be achieved.
  • Running-in period with reduced temperature peaks
    Tapered roller bearings typically have a running-in period, during which a conventional design tapered roller bearing experiences significant friction, resulting in wear. This effect is noticed as a temperature spike. With a tapered roller bearing design, friction, frictional heat, and wear are significantly reduced, provided the bearings are mounted and lubricated correctly.
  • Separable and interchangeable
    The inner ring with roller and cage assembly (cone) can be mounted separately from the outer ring (cup). This facilitates mounting, dismounting, and also maintenance inspection routines. Furthermore, the separable components are interchangeable.

Applications of single row metric tapered roller bearings

Single row tapered roller metric bearings are widely used in industries:

  • mining
  • petroleum
  • heavy machinery
  • wind power
  • engineering machinery
  • and other industries