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Hot tags:GQZ precious-quality 7921dt,7921df,7921db,7921c bearing with reasonable price for customers all over the world and first-class service and unrivaled products.

GQZ high quality 7900 Series Single Row Angular Contact Ball Bearings

Angular contact ball bearings have inner and outer ring raceways that are displaced relative to each other in the direction of the bearing axis. This means that these bearings are designed to accommodate combined loads, i.e. simultaneously acting radial and axial loads.

The axial load carrying capacity of angular contact ball bearings increases as the contact angle increases. The contact angle is defined as the angle between the line joining the points of contact of the ball and the raceways in the radial plane, along which the combined load is transmitted from one raceway to another, and a line perpendicular to the bearing axis

The most commonly used designs are:

single row angular contact ball bearings 

double row angular contact ball bearings 

four-point contact ball bearings 


7900 Series
  • 7900 Series
  • 7900 Series

7900 Series bearing

Dimension and Parameters
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7900 Series 7900 Series
7921DT,7921DF,7921DB,7921C bearing
  • Bearing Numbers
  • Single row
    7921C
  • DB
    7921DB
  • DF
    7921DF
  • DT
    7921DT
  • Principal dimensions(mm)
  • d
    105
  • D
    145
  • B
    20
  • r(min)
    1.1
  • r1(min)
    0.6
  • Basic load ratings(N)
  • Cr
    51000
  • Cor
    57000
  • Basic load ratings(kgf)
  • Cr
    5200
  • Cor
    5800
  • Value
  • fo
    16.5
  • Limiting Speed (rpm)
  • Grease
    6300
  • Oil
    9000
  • Distance of action point(mm)
  • a
    26.7
  • Abutment and fillet dimensions
  • da(min)
    112
  • Da(max)
    138
  • ra(max)
    1
  • Weight
  • (kg)
    0.826
  • Basic load ratings(duplex bearing) (N)
  • Cr
    83000
  • Cor
    114000
  • Basic load ratings(duplex bearing) (kgf)
  • Cr
    8450
  • Cor
    11600
  • Limiting Speed(duplex bearing) (rpm)
  • Grease
    5300
  • Oil
    7100
  • Distance of action point (duplex bearing)(a0)
  • back-to-back arrangement
    53.5
  • face-to-face arrangement
    13.5
  • Installation dimensions(duplex bearing)
  • db(min)
    -
  • Db(max)
    140
  • rb(max)
    0.6