7921DB
Type

Machine tool spindle bearings

Model:7921DB
Thickness(mm):20
Inner diameter d:105
Outer diameter D:145

Detailed information

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Dimensions
  • d105
  • D145
  • B20
  • r Minimum1.1
  • r 1 (Minimum)0.6
Load rating (N)
  • Cr48000
  • Cor54000
Load rating {kgf}
  • Cr4900
  • Cor5500
Limit speed(1)(rpm)
  • Grease lubrication6600
  • Oil lubrication7500
Action point position (mm)
  • a39.2
Installation size (mm)
  • d a (Minimum)112
  • Da (Maximum)138
  • r a (Maximum)1
Bearing code(2)
  • Single column7921A5
  • DB7921DB
  • DF7921DF
  • DT7921DT
Rated load (paired double type) (N)
  • Cr78500
  • Cor108000
Rated load (paired double type) {kgf}
  • Cr8000
  • Cor11000
Paired Duplex Limit speed(1) (rpm)
  • Grease lubrication4300
  • Oil lubrication6000
Paired Duplex Action point distance a0(mm)
  • Back-to-back configuration78.3
  • Face-to-face configuration38.3
Paired Duplex Installation size(mm)
  • db(3) (Minimum)-
  • Db (Maximum)140
  • rb(3) (Maximum)0.6
Coefficientfo
  • Coefficientfo16.4
weight(kg)
  • (Refer to)0.82

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